nuclear power plant advantages essay

Nuclear energy protects air quality by producing massive amounts of carbon-free electricity. It powers communities in 28 U.S. states and contributes to many non-electric applications, ranging from the  medical field to space exploration .

The Office of Nuclear Energy within the U.S. Department of Energy (DOE) focuses its research primarily on maintaining the existing fleet of reactors, developing new advanced reactor technologies, and improving the nuclear fuel cycle to increase the sustainability of our energy supply and strengthen the U.S. economy.

Below are some of the main advantages of nuclear energy and the challenges currently facing the industry today.

Advantages of Nuclear Energy

Clean Energy Source

Nuclear is the largest source of clean power in the United States. It generates nearly 800 billion kilowatt hours of electricity each year and produces more than half of the nation’s emissions-free electricity. This avoids more than 470 million metric tons of carbon each year, which is the equivalent of removing 100 million cars off of the road.

Creates Jobs

The nuclear industry supports nearly half a million jobs in the United States and contributes an estimated $60 billion to the U.S. gross domestic product each year. U.S. nuclear plants can employ up to 700 workers with salaries that are 30% higher than the local average. They also contribute billions of dollars annually to local economies through federal and state tax revenues.

Supports National Security

A strong civilian nuclear sector is essential to U.S. national security and energy diplomacy. The United States must maintain its global leadership in this arena to influence the peaceful use of nuclear technologies. The U.S. government works with countries in this capacity to build relationships and develop new opportunities for the nation’s nuclear technologies.

Challenges of Nuclear Energy

Public Awareness

Commercial nuclear power is sometimes viewed by the general public as a dangerous or unstable process. This perception is often based on three global nuclear accidents, its false association with nuclear weapons, and how it is portrayed on popular television shows and films.

DOE and its national labs are working with industry to develop new reactors and fuels that will increase the overall performance of these technologies and reduce the amount of nuclear waste that is produced.  

DOE also works to provide accurate, fact-based information about nuclear energy through its social media and STEM outreach efforts to educate the public on the benefits of nuclear energy.

Used Fuel Transportation, Storage and Disposal

Many people view used fuel as a growing problem and are apprehensive about its transportation, storage, and disposal. DOE is responsible for the eventual disposal and associated transport of all commercial used fuel , which is currently securely stored at 76 reactor or storage sites in 34 states. For the foreseeable future, this fuel can safely remain at these facilities until a permanent disposal solution is determined by Congress.

DOE is currently evaluating nuclear power plant sites and nearby transportation infrastructure to support the eventual transport of used fuel away from these sites. It is also developing new, specially designed railcars to support large-scale transport of used fuel in the future.

Constructing New Power Plants

Building a nuclear power plant can be discouraging for stakeholders. Conventional reactor designs are considered multi-billion dollar infrastructure projects. High capital costs, licensing and regulation approvals, coupled with long lead times and construction delays, have also deterred public interest.

Microreactor (left) - Small Modular Reactor (right)

DOE is rebuilding its nuclear workforce by  supporting the construction  of two new reactors at Plant Vogtle in Waynesboro, Georgia. The units are the first new reactors to begin construction in the United States in more than 30 years. The expansion project will support up to 9,000 workers at peak construction and create 800 permanent jobs at the facility when the new units begin operation in 2023.

DOE is also supporting the development of smaller reactor designs, such as  microreactors  and  small modular reactors , that will offer even more flexibility in size and power capacity to the customer. These factory-built systems are expected to dramatically reduce construction timelines and will make nuclear more affordable to build and operate.

High Operating Costs

Challenging market conditions have left the nuclear industry struggling to compete. DOE’s  Light Water Reactor Sustainability (LWRS) program  is working to overcome these economic challenges by modernizing plant systems to reduce operation and maintenance costs, while improving performance. In addition to its materials research that supports the long-term operation of the nation’s fleet of reactors, the program is also looking to diversify plant products through non-electric applications such as water desalination and  hydrogen production .

To further improve operating costs. DOE is also working with industry to develop new fuels and cladding known as  accident tolerant fuels . These new fuels could increase plant performance, allowing for longer response times and will produce less waste. Accident tolerant fuels could gain widespread use by 2025.

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The Advantages and Disadvantages of Nuclear Energy

Since the first nuclear plant started operations in the 1950s, the world has been highly divided on nuclear as a source of energy. While it is a cleaner alternative to fossil fuels, this type of power is also associated with some of the world’s most dangerous and deadliest weapons, not to mention nuclear disasters . The extremely high cost and lengthy process to build nuclear plants are compensated by the fact that producing nuclear energy is not nearly as polluting as oil and coal. In the race to net-zero carbon emissions, should countries still rely on nuclear energy or should they make space for more fossil fuels and renewable energy sources? We take a look at the advantages and disadvantages of nuclear energy. 

What Is Nuclear Energy?

Nuclear energy is the energy source found in an atom’s nucleus, or core. Once extracted, this energy can be used to produce electricity by creating nuclear fission in a reactor through two kinds of atomic reaction: nuclear fusion and nuclear fission. During the latter, uranium used as fuel causes atoms to split into two or more nuclei. The energy released from fission generates heat that brings a cooling agent, usually water, to boil. The steam deriving from boiling or pressurised water is then channelled to spin turbines to generate electricity. To produce nuclear fission, reactors make use of uranium as fuel.

For centuries, the industrialisation of economies around the world was made possible by fossil fuels like coal, natural gas, and petroleum and only in recent years countries opened up to alternative, renewable sources like solar and wind energy. In the 1950s, early commercial nuclear power stations started operations, offering to many countries around the world an alternative to oil and gas import dependency and a far less polluting energy source than fossil fuels. Following the 1970s energy crisis and the dramatic increase of oil prices that resulted from it, more and more countries decided to embark on nuclear power programmes. Indeed, most reactors have been built  between 1970 and 1985 worldwide. Today, nuclear energy meets around 10% of global energy demand , with 439 currently operational nuclear plants in 32 countries and about 55 new reactors under construction. In 2020, 13 countries produced at least one-quarter of their total electricity from nuclear, with the US, China, and France dominating the market by far. 

Fossil fuels make up 60% of the United States’ electricity while the remaining 40% is equally split between renewables and nuclear power. France embarked on a sweeping expansion of its nuclear power industry in the 1970s with the ultimate goal of breaking its dependence on foreign oil. In doing this, the country was able to build up its economy by simultaneously cutting its emissions at a rate never seen before. Today, France is home to 56 operating reactors and it relies on nuclear power for 70% of its electricity . 

You might also like: A ‘Breakthrough’ In Nuclear Fusion: What Does It Mean for the Future of Energy Generation?

Advantages of Nuclear Energy

France’s success in cutting down emissions is a clear example of some of the main advantages of nuclear energy over fossil fuels. First and foremost, nuclear energy is clean and it provides pollution-free power with no greenhouse gas emissions. Contrary to what many believe, cooling towers in nuclear plants only emit water vapour and are thus, not releasing any pollutant or radioactive substance into the atmosphere. Compared to all the energy alternatives we currently have on hand, many experts believe that nuclear energy is indeed one of the cleanest sources. Many nuclear energy supporters also argue that nuclear power is responsible for the fastest decarbonisation effort in history , with big nuclear players like France, Saudi Arabia, Canada, and South Korea being among the countries that recorded the fastest decline in carbon intensity and experienced a clean energy transition by building nuclear reactors and hydroelectric dams.

Earlier this year, the European Commission took a clear stance on nuclear power by labelling it a green source of energy in its classification system establishing a list of environmentally sustainable economic activities. While nuclear energy may be clean and its production emission-free, experts highlight a hidden danger of this power: nuclear waste. The highly radioactive and toxic byproduct from nuclear reactors can remain radioactive for tens of thousands of years. However, this is still considered a much easier environmental problem to solve than climate change. The main reason for this is that as much as 90% of the nuclear waste generated by the production of nuclear energy can be recycled. Indeed, the fuel used in a reactor, typically uranium, can be treated and put into another reactor as only a small amount of energy in their fuel is extracted in the fission process.

A rather important advantage of nuclear energy is that it is much safer than fossil fuels from a public health perspective. The pro-nuclear movement leverages the fact that nuclear waste is not even remotely as dangerous as the toxic chemicals coming from fossil fuels. Indeed, coal and oil act as ‘ invisible killers ’ and are responsible for 1 in 5 deaths worldwide . In 2018 alone, fossil fuels killed 8.7 million people globally. In contrast, in nearly 70 years since the beginning of nuclear power, only three accidents have raised public alarm: the 1979 Three Mile Island accident, the 1986 Chernobyl disaster and the 2011 Fukushima nuclear disaster. Of these, only the accident at the Chernobyl nuclear plant in Ukraine directly caused any deaths.

Finally, nuclear energy has some advantages compared to some of the most popular renewable energy sources. According to the US Office of Nuclear Energy , nuclear power has by far the highest capacity factor, with plants requiring less maintenance, capable to operate for up to two years before refuelling and able to produce maximum power more than 93% of the time during the year, making them three times more reliable than wind and solar plants. 

You might also like: Nuclear Energy: A Silver Bullet For Clean Energy?

Disadvantages of Nuclear Energy

The anti-nuclear movement opposes the use of this type of energy for several reasons. The first and currently most talked about disadvantage of nuclear energy is the nuclear weapon proliferation, a debate triggered by the deadly atomic bombing of the Japanese cities of Hiroshima and Nagasaki during the Second World War and recently reopened following rising concerns over nuclear escalation in the Ukraine-Russia conflict . After the world saw the highly destructive effect of these bombs, which caused the death of tens of thousands of people, not only in the impact itself but also in the days, weeks, and months after the tragedy as a consequence of radiation sickness, nuclear energy evolved to a pure means of generating electricity. In 1970, the Treaty on the Non-Proliferation of Nuclear Weapons entered into force. Its objective was to prevent the spread of such weapons to eventually achieve nuclear disarmament as well as promote peaceful uses of nuclear energy. However, opposers of this energy source still see nuclear energy as being deeply intertwined with nuclear weapons technologies and believe that, with nuclear technologies becoming globally available, the risk of them falling into the wrong hands is high, especially in countries with high levels of corruption and instability. 

As mentioned in the previous section, nuclear energy is clean. However, radioactive nuclear waste contains highly poisonous chemicals like plutonium and the uranium pellets used as fuel. These materials can be extremely toxic for tens of thousands of years and for this reason, they need to be meticulously and permanently disposed of. Since the 1950s, a stockpile of 250,000 tonnes of highly radioactive nuclear waste has been accumulated and distributed across the world, with 90,000 metric tons stored in the US alone. Knowing the dangers of nuclear waste, many oppose nuclear energy for fears of accidents, despite these being extremely unlikely to happen. Indeed, opposers know that when nuclear does fail, it can fail spectacularly. They were reminded of this in 2011, when the Fukushima disaster, despite not killing anyone directly, led to the displacement of more than 150,000 people, thousands of evacuation/related deaths and billions of dollars in cleanup costs. 

Lastly, if compared to other sources of energy, nuclear power is one of the most expensive and time-consuming forms of energy. Nuclear plants cost billions of dollars to build and they take much longer than any other infrastructure for renewable energy, sometimes even more than a decade. However, while nuclear power plants are expensive to build, they are relatively cheap to run , a factor that improves its competitiveness. Still, the long building process is considered a significant obstacle in the run to net-zero emissions that countries around the world have committed to. If they hope to meet their emission reduction targets in time, they cannot afford to rely on new nuclear plants.

You might also like: The Nuclear Waste Disposal Dilemma

Who Wins the Nuclear Debate?

There are a multitude of advantages and disadvantages of nuclear energy and the debate on whether to keep this technology or find other alternatives is destined to continue in the years to come. Nuclear power can be a highly destructive weapon, but the risks of a nuclear catastrophe are relatively low. While historic nuclear disasters can be counted on the fingers of a single hand, they are remembered for their devastating impact and the life-threatening consequences they sparked (or almost sparked). However, it is important to remember that fossil fuels like coal and oil represent a much bigger threat and silently kill millions of people every year worldwide. Another big aspect to take into account, and one that is currently discussed by global leaders, is the dependence of some of the world’s largest economies on countries like Russia, Saudi Arabia, and Iraq for fossil fuels. While the 2011 Fukushima disaster, for example, pushed the then-German Chancellor Angela Merkel to close all of Germany’s nuclear plants, her decision only increased the country’s dependence on much more polluting Russian oil. Nuclear supporters argue that relying on nuclear energy would decrease the energy dependency from third countries. However, raw materials such as the uranium needed to make plants function would still need to be imported from countries like Canada, Kazakhstan, and Australia. The debate thus shifts to another problem: which countries should we rely on for imports and, most importantly, is it worth keeping these dependencies?

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Pros and Cons of Nuclear Power Essay

Introduction.

Nuclear power in description is a contained nuclear fission that generates electricity and heat. Nuclear power plants provide about 6% of the world’s energy and 14% of electricity. Nuclear energy is neither green nor sustainable energy because of the life threatening aspect from its wastes and the nuclear plants themselves.

Another reason is that its only source of raw material is only available on earth. On the other hand, nuclear energy is a non-renewable energy because of the scarcity of its source fuel, uranium, which has an estimation of about 30 to 60 years before it becomes extinct (Florida State University 1).

Nuclear power pros

Nuclear power has quite a number of pros associated with its use. The first pro of nuclear energy is that it emits little pollution to the environment. A power plant that uses coal emits more radiation than nuclear powered plant. Another pro of nuclear energy is that it is reliable.

Because of the fact that nuclear plants uses little fuel, their vulnerability to natural disasters or strikes is limited. The next pro is safety that nuclear energy provides. Safety is both a pro and a con, depending on what point of view one takes. Nevertheless, even though results from a reactor can be disastrous, prevention mechanisms for it work perfectly well with it. Another pro that is associated with nuclear energy is efficiency.

In considering the different economic viewpoints, nuclear energy offers the best solution in energy provision and is more advantageous. In addition, we have portability as the next pro of nuclear energy. A high amount of nuclear energy can be contained in a very small amount of volume. Lastly, the technology that nuclear energy adopts is readily available and does not require development before use (Time for change.org 1).

Nuclear power cons

On the other hand, nuclear energy has a number of cons that are associated with its usage. First is the problem of radioactive waste, whereby nuclear energy waste from it is extremely dangerous and needs careful look-up.

The other con of nuclear energy is that of its waste storage. A good number of wastes from nuclear energy are radioactive even thousands of years later since they contain both radioactive and fissionable materials. These materials are removable through a process called reprocessing which is through clearing all the fissionable materials in the nuclear fuel.

The next con of nuclear energy is the occurrence of a meltdown. A meltdown can be the worst-case scenario that can ever occur in a nuclear energy plant because its effects are deadly. The effects of a meltdown are very huge with estimation that radioactive contamination can cover a distance of over a thousand miles in radius. The final downturn associated with nuclear energy is radiation. Radiation mostly is associated with effects such as cancer, mutation and radiation sickness (Green Energy, Inc. 1).

Impacts of nuclear energy on the society

The society being an association that has people of diverse ideologies and faiths regarding the production and consumption of energy, and economic goods, to the good life and good society. Nuclear energy should serve social justice and quality of life rather than being looked upon as end in it.

The existence of technology is purposely for serving human needs; it can destroy people and human values, deliberately or by unintended consequences. Because of this, the technological processes are guided by values that require constant public scrutiny and discussion.

Nuclear energy has implications towards the political viewpoint in that a country might wish to take advantage of its nuclear weapons to gain control of others. This will deprive others of their democratic rights coexist within their territory without interference of intruders.

Legal impacts

In terms of the legal impacts of nuclear energy, there are regulations that gives rights to who or which organizations have the authority to own nuclear facilities. The legal implications also target what specific standards are set out for adequate protection and what risks are not acceptable.

From the above discussion, in comparing the pros and cons of nuclear energy, one can conclude that as much as nuclear energy has severe effects to people and environment it also has varied benefits. In my own viewpoint, I presume to counter with the cons rather than the pros. It is evident what devastating effect nuclear energy has on the environment and as much as it benefits the environment through low pollution, in case of an accident and there is a meltdown the whole environment will be wiped out.

In a moral standpoint, I believe that lives of people are more important than energy sources. In as much as we would wish to have the most reliable energy source, our lives is the most important than any other thing (Florida State University 1).

In conclusion, it is evident from the mentioned pros and cons that nuclear energy is not the all-time solution to any problem. One can argue that to the extreme it is much of a problem source that a solution. In an effort to getting a good life, withstanding the ethical and moral issues, we should always strive for sustaining our lives to the best way possible. Nevertheless, many of the social and ethical issues associated with emerging nuclear power require determinate, immediate, distinct, significant actions (Falk 1).

Works Cited

Falk, Jim. Global Fission: The Battle over Nuclear Power. Oxford: Oxford University Press, 1982. Print.

Florida State University. “Pros of Nuclear Power.” eng.fsu.edu . FSU, n.d. Web.

Green Energy, Inc. “Pros and Cons of Nuclear Power.” greenenergyhelpfiles.com . Green Energy, n.d. Web.

Time for change.org. “ Pros and cons of nuclear power ”. timeforchange.org. Time For Change, n.d. Web.

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IvyPanda . 2024. "Pros and Cons of Nuclear Power." February 29, 2024. https://ivypanda.com/essays/pros-and-cons-of-nuclear-power/.

1. IvyPanda . "Pros and Cons of Nuclear Power." February 29, 2024. https://ivypanda.com/essays/pros-and-cons-of-nuclear-power/.

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IvyPanda . "Pros and Cons of Nuclear Power." February 29, 2024. https://ivypanda.com/essays/pros-and-cons-of-nuclear-power/.

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The Advantages of Having Nuclear Power Plants

Types of Nuclear Energy

Nuclear power plants produce electricity using uranium and other radioactive elements as fuel, which are unstable. In a process called nuclear fission, the atoms of these elements are broken apart, in the process ejecting neutrons and other atomic fragments together with large amounts of energy. Practical nuclear power dates back to the 1950s and has proved itself a reliable, economical source of energy, providing power not only for communities but also for space missions and ships at sea. In the 21st century, global warming has provided new reasons to exploit the advantages of nuclear power.

Compatible Technology

Although a nuclear power plant gets its energy from radioactive materials, many nuclear plants have similarities with fossil-fuel plants. Both a nuclear facility and a coal-fired one produce heat to boil water into steam. The high-pressure steam turns a turbine, which in turn powers an electrical generator. The steam, turbine and generator technology is nearly identical in each situation. Using time-tested steam and turbine technology improves the nuclear power plant’s reliability.

Carbon-Free Energy

Power plants that burn fossil fuels, such as coal and natural gas, produce huge quantities of carbon dioxide, a gas that contributes significantly to global warming. By contrast, nuclear power plants make heat without burning anything. The radioactive materials produce no carbon dioxide, making nuclear power plants serious alternatives for generating electricity.

Off-Grid Power

Unlike traditional power plants that burn fossil fuels, nuclear plants consume no oxygen and give off no carbon dioxide. They run for long periods on a relatively small amount of fuel. This makes them ideal for powering submarines, which can operate under water for many months at a time. For similar reasons, special nuclear power generators used in deep-space probes provide electricity at the far edge of the solar system, where the sun’s rays are too weak to run solar panels. These nuclear generators do not use steam but convert heat into electricity electronically.

Base Load Power

Some sources of renewable energy, such as solar panels and wind turbines, provide electricity without making carbon dioxide. Their power changes depending on the weather and time of day, however. Nuclear power plants generate the same power around the clock, every day, regardless of outside conditions. Nuclear plants have what the energy industry calls “base load capability,” meaning it provides most or all of a population’s electricity needs reliably. Power grids are becoming increasingly computerized, however; they can switch between different power sources automatically. The “base load” advantage may lose its importance in time.

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About the Author

Chicago native John Papiewski has a physics degree and has been writing since 1991. He has contributed to "Foresight Update," a nanotechnology newsletter from the Foresight Institute. He also contributed to the book, "Nanotechnology: Molecular Speculations on Global Abundance." Please, no workplace calls/emails!

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The Differences Between Nuclear Power & Fossil Fuel-Burning Power Plants

Benefits and Disadvantages of Nuclear Energy

Jesse kuet march 22, 2018, submitted as coursework for ph241 , stanford university, winter 2018.

According to the 2017 BP Statistical Review of World Energy, about 4.7% of the world's energy budget is dedicated to nuclear energy. [1] The utilization of nuclear power has been portrayed negatively in the media. Although there are severe consequences if a nuclear power plant goes awry, there are also many benefits associated with its usage. The purpose of this paper is to inform readers about the advantages and disadvantages of using nuclear power to create electrical energy.

Advantages of Nuclear Power

Most light water reactors (See Fig. 1) that make up the world's nuclear capacity create electricity at costs of between $0.025 and $0.07 USD per kilowatt-hour dependent upon the design and requirements of each reactor, and experiences many favorable variables such as government subsidies and research. [2] To put into perspective, in California, the wholesale price to produce electricity from natural gas is approximately $0.05 USD per kilowatt-hour, revealing that nuclear energy may or may not be as costly as other alternatives in certain geographical areas. In addition, nuclear energy by far has the lowest impact on the environment since it does not release any gases like carbon dioxide or methane, which are largely responsible for the greenhouse effect." [3] As a result, this differentiates nuclear energy from fossil fuels in that it does not produce negative carbon externalities as a byproduct, "though some greenhouse gases are released while transporting fuel or extracting energy from uranium." [3] The factor of scarcity is not of concern when it comes to the reactors fuel source, which is primarily uranium. There are roughly 5.5 million tonnes of uranium in the known reserves that could be mined at $130 USD per kilogram. [2] Currently, with the world's consumption of around 66,500 tonnes per year, there is about 80 years worth of fuel with the known reserves since the element is relatively abundant in the earth's crust. The main advantage to nuclear energy is that is it relatively low-cost and consistently runs on its full potential, making it the ideal source to power national grids. [2,4]

Disadvantages of Nuclear Power

The hindrance in the growth of nuclear energy is due to many complex reasons, and a major component is the nuclear waste. The further implementations of nuclear power are limited because although nuclear energy does not produce CO 2 the way fossil fuels do, there is still a toxic byproduct produced from uranium-fueled nuclear cycles: radioactive fission waste. 1 tonne of fresh fuel rod waste from a nuclear reactor would give you a fatal dose of radiation in 10 seconds if placed 3 meters away. Plutonium is also of concern, as it increases an exposed person's potential in developing liver, bone, or lung cancer. [5] There is also a negative political perception associated with nuclear plants and nuclear weapons, so expansive growth of nuclear energy is difficult to accomplish. In addition, nuclear power plants could also be ideal targets for terrorists due to the fissile plutonium components of the waste, which could be reused as bomb fuel. [2] Also a terrorist attack on a large reactor would cause a widespread radiation catastrophe at a scale similar to Chernobyl. The final disadvantage is the plant's concentrated level of capital. Although the fuel cost to produce power using nuclear energy is relatively low, there is still the necessity of having highly skilled workers to build, maintain and monitor the operations to ensure the safety and process of the plant.

© Jesse Kuet. The author warrants that the work is the author's own and that Stanford University provided no input other than typesetting and referencing guidelines. The author grants permission to copy, distribute and display this work in unaltered form, with attribution to the author, for noncommercial purposes only. All other rights, including commercial rights, are reserved to the author.

[1] " BP Statistical Review of World Energy 2017 ," British Petroleum, June 2017.

[2] Q. Schiermeier, "Energy Alternatives: Electricity without Carbon," Nature 454 , 816 (2008).

[3] T. Thomas, " "Advantages of Nuclear Energy Use ," Physics 241, Stanford University, Winter 2016.

[4] G. Cravens, Power to Save the World: The Truth About Nuclear Energy (Knopf, 2008).

[5] D. M. Taylor, "Environmental Plutonium in Humans," Appl. Radiat. Isotopes 46 , 1245 (1995).

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Nuclear Power in a Clean Energy System

About this report.

With nuclear power facing an uncertain future in many countries, the world risks a steep decline in its use in advanced economies that could result in billions of tonnes of additional carbon emissions. Some countries have opted out of nuclear power in light of concerns about safety and other issues. Many others, however, still see a role for nuclear in their energy transitions but are not doing enough to meet their goals.

The publication of the IEA's first report addressing nuclear power in nearly two decades brings this important topic back into the global energy debate.

Key findings

Nuclear power is the second-largest source of low-carbon electricity today.

Nuclear power is the second-largest source of low-carbon electricity today, with 452 operating reactors providing 2700 TWh of electricity in 2018, or 10% of global electricity supply.

In advanced economies, nuclear has long been the largest source of low-carbon electricity, providing 18% of supply in 2018. Yet nuclear is quickly losing ground. While 11.2 GW of new nuclear capacity was connected to power grids globally in 2018 – the highest total since 1990 – these additions were concentrated in China and Russia.

Global low-carbon power generation by source, 2018

Cumulative co2 emissions avoided by global nuclear power in selected countries, 1971-2018, an aging nuclear fleet.

In the absense of further lifetime extensions and new projects could result in an additional 4 billion tonnes of CO2 emissions, underlining the importance of the nuclear fleet to low-carbon energy transitions around the globe. In emerging and developing economies, particularly China, the nuclear fleet will provide low-carbon electricity for decades to come.

However the nuclear fleet in advanced economies is 35 years old on average and many plants are nearing the end of their designed lifetimes. Given their age, plants are beginning to close, with 25% of existing nuclear capacity in advanced economies expected to be shut down by 2025.

It is considerably cheaper to extend the life of a reactor than build a new plant, and costs of extensions are competitive with other clean energy options, including new solar PV and wind projects. Nevertheless they still represent a substantial capital investment. The estimated cost of extending the operational life of 1 GW of nuclear capacity for at least 10 years ranges from $500 million to just over $1 billion depending on the condition of the site.

However difficult market conditions are a barrier to lifetime extension investments. An extended period of low wholesale electricity prices in most advanced economies has sharply reduced or eliminated margins for many technologies, putting nuclear at risk of shutting down early if additional investments are needed. As such, the feasibility of extensions depends largely on domestic market conditions.

Age profile of nuclear power capacity in selected regions, 2019

United states, levelised cost of electricity in the united states, 2040, european union, levelised cost of electricity in the european union, 2040, levelised cost of electricity in japan, 2040, the nuclear fade case, nuclear capacity operating in selected advanced economies in the nuclear fade case, 2018-2040, wind and solar pv generation by scenario 2019-2040, policy recommendations.

In this context, countries that intend to retain the option of nuclear power should consider the following actions:

• Keep the option open:  Authorise lifetime extensions of existing nuclear plants for as long as safely possible. 
• Value dispatchability:  Design the electricity market in a way that properly values the system services needed to maintain electricity security, including capacity availability and frequency control services. Make sure that the providers of these services, including nuclear power plants, are compensated in a competitive and non-discriminatory manner.
• Value non-market benefits:  Establish a level playing field for nuclear power with other low-carbon energy sources in recognition of its environmental and energy security benefits and remunerate it accordingly.
• Update safety regulations:  Where necessary, update safety regulations in order to ensure the continued safe operation of nuclear plants. Where technically possible, this should include allowing flexible operation of nuclear power plants to supply ancillary services.
• Create a favourable financing framework:  Create risk management and financing frameworks that facilitate the mobilisation of capital for new and existing plants at an acceptable cost taking the risk profile and long time-horizons of nuclear projects into consideration.
• Support new construction:  Ensure that licensing processes do not lead to project delays and cost increases that are not justified by safety requirements.
• Support innovative new reactor designs:  Accelerate innovation in new reactor designs with lower capital costs and shorter lead times and technologies that improve the operating flexibility of nuclear power plants to facilitate the integration of growing wind and solar capacity into the electricity system.
• Maintain human capital:  Protect and develop the human capital and project management capabilities in nuclear engineering.

Executive summary

Nuclear power can play an important role in clean energy transitions.

Nuclear power today makes a significant contribution to electricity generation, providing 10% of global electricity supply in 2018.  In advanced economies 1 , nuclear power accounts for 18% of generation and is the largest low-carbon source of electricity. However, its share of global electricity supply has been declining in recent years. That has been driven by advanced economies, where nuclear fleets are ageing, additions of new capacity have dwindled to a trickle, and some plants built in the 1970s and 1980s have been retired. This has slowed the transition towards a clean electricity system. Despite the impressive growth of solar and wind power, the overall share of clean energy sources in total electricity supply in 2018, at 36%, was the same as it was 20 years earlier because of the decline in nuclear. Halting that slide will be vital to stepping up the pace of the decarbonisation of electricity supply.

A range of technologies, including nuclear power, will be needed for clean energy transitions around the world.  Global energy is increasingly based around electricity. That means the key to making energy systems clean is to turn the electricity sector from the largest producer of CO 2 emissions into a low-carbon source that reduces fossil fuel emissions in areas like transport, heating and industry. While renewables are expected to continue to lead, nuclear power can also play an important part along with fossil fuels using carbon capture, utilisation and storage. Countries envisaging a future role for nuclear account for the bulk of global energy demand and CO 2 emissions. But to achieve a trajectory consistent with sustainability targets – including international climate goals – the expansion of clean electricity would need to be three times faster than at present. It would require 85% of global electricity to come from clean sources by 2040, compared with just 36% today. Along with massive investments in efficiency and renewables, the trajectory would need an 80% increase in global nuclear power production by 2040.

Nuclear power plants contribute to electricity security in multiple ways.  Nuclear plants help to keep power grids stable. To a certain extent, they can adjust their operations to follow demand and supply shifts. As the share of variable renewables like wind and solar photovoltaics (PV) rises, the need for such services will increase. Nuclear plants can help to limit the impacts from seasonal fluctuations in output from renewables and bolster energy security by reducing dependence on imported fuels.

Lifetime extensions of nuclear power plants are crucial to getting the energy transition back on track

Policy and regulatory decisions remain critical to the fate of ageing reactors in advanced economies.  The average age of their nuclear fleets is 35 years. The European Union and the United States have the largest active nuclear fleets (over 100 gigawatts each), and they are also among the oldest: the average reactor is 35 years old in the European Union and 39 years old in the United States. The original design lifetime for operations was 40 years in most cases. Around one quarter of the current nuclear capacity in advanced economies is set to be shut down by 2025 – mainly because of policies to reduce nuclear’s role. The fate of the remaining capacity depends on decisions about lifetime extensions in the coming years. In the United States, for example, some 90 reactors have 60-year operating licenses, yet several have already been retired early and many more are at risk. In Europe, Japan and other advanced economies, extensions of plants’ lifetimes also face uncertain prospects.

Economic factors are also at play.  Lifetime extensions are considerably cheaper than new construction and are generally cost-competitive with other electricity generation technologies, including new wind and solar projects. However, they still need significant investment to replace and refurbish key components that enable plants to continue operating safely. Low wholesale electricity and carbon prices, together with new regulations on the use of water for cooling reactors, are making some plants in the United States financially unviable. In addition, markets and regulatory systems often penalise nuclear power by not pricing in its value as a clean energy source and its contribution to electricity security. As a result, most nuclear power plants in advanced economies are at risk of closing prematurely.

The hurdles to investment in new nuclear projects in advanced economies are daunting

What happens with plans to build new nuclear plants will significantly affect the chances of achieving clean energy transitions.  Preventing premature decommissioning and enabling longer extensions would reduce the need to ramp up renewables. But without new construction, nuclear power can only provide temporary support for the shift to cleaner energy systems. The biggest barrier to new nuclear construction is mobilising investment.  Plans to build new nuclear plants face concerns about competitiveness with other power generation technologies and the very large size of nuclear projects that require billions of dollars in upfront investment. Those doubts are especially strong in countries that have introduced competitive wholesale markets.

A number of challenges specific to the nature of nuclear power technology may prevent investment from going ahead.  The main obstacles relate to the sheer scale of investment and long lead times; the risk of construction problems, delays and cost overruns; and the possibility of future changes in policy or the electricity system itself. There have been long delays in completing advanced reactors that are still being built in Finland, France and the United States. They have turned out to cost far more than originally expected and dampened investor interest in new projects. For example, Korea has a much better record of completing construction of new projects on time and on budget, although the country plans to reduce its reliance on nuclear power.

Without nuclear investment, achieving a sustainable energy system will be much harder

A collapse in investment in existing and new nuclear plants in advanced economies would have implications for emissions, costs and energy security.  In the case where no further investments are made in advanced economies to extend the operating lifetime of existing nuclear power plants or to develop new projects, nuclear power capacity in those countries would decline by around two-thirds by 2040. Under the current policy ambitions of governments, while renewable investment would continue to grow, gas and, to a lesser extent, coal would play significant roles in replacing nuclear. This would further increase the importance of gas for countries’ electricity security. Cumulative CO 2 emissions would rise by 4 billion tonnes by 2040, adding to the already considerable difficulties of reaching emissions targets. Investment needs would increase by almost USD 340 billion as new power generation capacity and supporting grid infrastructure is built to offset retiring nuclear plants.

Achieving the clean energy transition with less nuclear power is possible but would require an extraordinary effort.  Policy makers and regulators would have to find ways to create the conditions to spur the necessary investment in other clean energy technologies. Advanced economies would face a sizeable shortfall of low-carbon electricity. Wind and solar PV would be the main sources called upon to replace nuclear, and their pace of growth would need to accelerate at an unprecedented rate. Over the past 20 years, wind and solar PV capacity has increased by about 580 GW in advanced economies. But in the next 20 years, nearly five times that much would need to be built to offset nuclear’s decline. For wind and solar PV to achieve that growth, various non-market barriers would need to be overcome such as public and social acceptance of the projects themselves and the associated expansion in network infrastructure. Nuclear power, meanwhile, can contribute to easing the technical difficulties of integrating renewables and lowering the cost of transforming the electricity system.

With nuclear power fading away, electricity systems become less flexible.  Options to offset this include new gas-fired power plants, increased storage (such as pumped storage, batteries or chemical technologies like hydrogen) and demand-side actions (in which consumers are encouraged to shift or lower their consumption in real time in response to price signals). Increasing interconnection with neighbouring systems would also provide additional flexibility, but its effectiveness diminishes when all systems in a region have very high shares of wind and solar PV.

Offsetting less nuclear power with more renewables would cost more

Taking nuclear out of the equation results in higher electricity prices for consumers.  A sharp decline in nuclear in advanced economies would mean a substantial increase in investment needs for other forms of power generation and the electricity network. Around USD 1.6 trillion in additional investment would be required in the electricity sector in advanced economies from 2018 to 2040. Despite recent declines in wind and solar costs, adding new renewable capacity requires considerably more capital investment than extending the lifetimes of existing nuclear reactors. The need to extend the transmission grid to connect new plants and upgrade existing lines to handle the extra power output also increases costs. The additional investment required in advanced economies would not be offset by savings in operational costs, as fuel costs for nuclear power are low, and operation and maintenance make up a minor portion of total electricity supply costs. Without widespread lifetime extensions or new projects, electricity supply costs would be close to USD 80 billion higher per year on average for advanced economies as a whole.

Strong policy support is needed to secure investment in existing and new nuclear plants

Countries that have kept the option of using nuclear power need to reform their policies to ensure competition on a level playing field.  They also need to address barriers to investment in lifetime extensions and new capacity. The focus should be on designing electricity markets in a way that values the clean energy and energy security attributes of low-carbon technologies, including nuclear power.

Securing investment in new nuclear plants would require more intrusive policy intervention given the very high cost of projects and unfavourable recent experiences in some countries.  Investment policies need to overcome financing barriers through a combination of long-term contracts, price guarantees and direct state investment.

Interest is rising in advanced nuclear technologies that suit private investment such as small modular reactors (SMRs).  This technology is still at the development stage. There is a case for governments to promote it through funding for research and development, public-private partnerships for venture capital and early deployment grants. Standardisation of reactor designs would be crucial to benefit from economies of scale in the manufacturing of SMRs.

Continued activity in the operation and development of nuclear technology is required to maintain skills and expertise.  The relatively slow pace of nuclear deployment in advanced economies in recent years means there is a risk of losing human capital and technical know-how. Maintaining human skills and industrial expertise should be a priority for countries that aim to continue relying on nuclear power.

The following recommendations are directed at countries that intend to retain the option of nuclear power. The IEA makes no recommendations to countries that have chosen not to use nuclear power in their clean energy transition and respects their choice to do so.

• Keep the option open:  Authorise lifetime extensions of existing nuclear plants for as long as safely possible.
• Value non-market benefits:  Establish a level playing field for nuclear power with other low carbon energy sources in recognition of its environmental and energy security benefits and remunerate it accordingly.
• Create an attractive financing framework:  Set up risk management and financing frameworks that can help mobilise capital for new and existing plants at an acceptable cost, taking the risk profile and long time horizons of nuclear projects into consideration.
• Support new construction:  Ensure that licensing processes do not lead to project delays and cost increases that are not justified by safety requirements. Support standardisation and enable learning-by-doing across the industry.
• Support innovative new reactor designs:  Accelerate innovation in new reactor designs, such as small modular reactors (SMRs), with lower capital costs and shorter lead times and technologies that improve the operating flexibility of nuclear power plants to facilitate the integration of growing wind and solar capacity into the electricity system.

Advanced economies consist of Australia, Canada, Chile, the 28 members of the European Union, Iceland, Israel, Japan, Korea, Mexico, New Zealand, Norway, Switzerland, Turkey and the United States.

Reference 1

Cite report.

IEA (2019), Nuclear Power in a Clean Energy System , IEA, Paris https://www.iea.org/reports/nuclear-power-in-a-clean-energy-system, Licence: CC BY 4.0

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The Benefits Of Nuclear Power

It won’t solve our energy problems, but our energy problems can’t be solved without it.

The following essay is excerpted from the foreword to Keeping the Lights on at America's Nuclear Power Plants , a new book from the Hoover Institution’s Shultz-Stephenson Task Force on Energy Policy. This work is part of the task force’s Reinventing Nuclear Power research series.

Nuclear power alone will not solve our energy problems. But we do not think they can be solved without it. This is the crux of our concerns and why we are offering this book. It describes the challenges nuclear power is facing today and what might be done about them.

One of us, between other jobs, built nuclear plants for a living; between other jobs, the other helped make them safer. In many respects, this is a personal topic for us both. But here are some facts:

We know that our country’s dominance in civilian nuclear power has been a key part of America’s ability to set norms and rules not just for power plants in less stable places around the world but also for the control of nuclear weapon proliferation. We know that it’s an important technology-intensive export industry too: America invented the technology, and the United States today remains the world’s largest nuclear power generator, with nearly a quarter of global plants (more if you count the hundred power reactors aboard our navy ships at sea). Domestically, we know that nuclear power gives us reliable electricity supply at scale, supplying one-fifth of all of our power production and that nearly two- thirds of our country’s pollution and carbon-dioxide-free energy comes from these facilities.

There are known risks and real costs to nuclear too, of course, but on balance we believe that the benefits for the country come out well ahead. Historically, much of the national nuclear enterprise has rested on the backs of the US federal government (and military) as well as on the ratepayers of the electric utilities who own or operate these facilities. The question today is if—and how—those same players will be able to shoulder that responsibility in the future.

When we first started looking into the nuclear question as part of our energy work at the Hoover Institution a few years ago through the Shultz-Stephenson Task Force on Energy Policy, we had our eyes toward the future: What were the prospects and roadblocks for a new generation of small, modular nuclear reactors? How about the licensing framework for advanced, next-generation plant designs? Could a new entrepreneurial portfolio approach help break through the nuclear fusion barrier? We wanted to know what it would take to “reinvent nuclear power.” Soon enough, though, it became clear that it would not be enough to reinvent the future of nuclear power; if we don’t want to make the commitment to finance and run the mature and already depreciated light water nuclear reactors of today effectively, we won’t have the option to make that choice tomorrow.

Nothing in energy happens in isolation, so nuclear power should be viewed in its larger context. In fact, we are in a new energy position in America today.

First, security. New supplies of oil and gas have come online throughout the country. This not only has reduced our imports but also given us the flexibility in our production that makes price fixing cartels such as OPEC weak.

Prices are falling too, not just in the well known oil and gas sectors, the result again of American ingenuity and relentless commercialization efforts in fracking and horizontal drilling, but in new energy technologies as well. Research and development in areas such as wind and solar or electric vehicles are driving down those costs faster than the scientists expected, though there is still substantial room to go. We also have made huge strides since the 1970s Arab oil crises in the more efficient—or thoughtful—use of energy and are in a much better position energy-wise financially and competitively because of it.

Meanwhile there is the environment. The good news is that we’ve already made a lot of progress. As anyone who experienced Los Angeles smog in the 1960s and 1970s can attest, the Clean Air Act has been huge for the air we breathe. On carbon dioxide emissions, the progress is mixed, but the influx of cheap natural gas, energy efficiency, and a growing menu of clean energy technologies suggest promise.

Our takeaway from all of this is that for perhaps the first time in modern history, we find ourselves with breathing room on the energy front. We are no longer simply struggling to keep the lights on or to keep from going broke while doing so. What will we then choose to do with that breathing room?

To put a finer point on it: America needs to ask itself if it’s acceptable to lose its nuclear power capability by the midpoint of this century. If so, then, plant by plant, our current road may take us there. Some would be happy with that result. Those that would not should understand that changing course is likely to require deliberate actions.

What would we be giving up if we forgot nuclear power?

An environmentalist might note that we’d be losing a technology that does not pollute the air or water. Radioactivity is a cultural and emotional concern for many people, but nuclear power produces a relatively small amount of such waste—at a predictable rate, with known characteristics, and with $30 billion in disposal costs already paid for. Perhaps surprisingly, nuclear power production actually releases one hundred times less radiation into the surrounding environment than does coal power. Overall, with a long track record, the rate of human injury caused by nuclear power production is the lowest of any power generation technology, including renewable resources.

Jobs are increasingly discussed in energy, as they have long been in other business policy. Nuclear power plants each employ about six hundred people, about ten times more than an equivalent natural gas plant. Many nuclear workers are midcareer military veterans with few other outlets for their specialized skills—one US nuclear utility reported last year that a third of all new hires at nuclear facilities were veterans, Often intentionally located in rural areas, nuclear plants are major economic inputs to sixty small towns and cities across America. The nuclear power technology and manufacturing supply chain is a global export business for domestic businesses—not just for multinationals but also closely held nuclear-rated component suppliers, forgers, and contractors.

Someone concerned with security can appreciate that the fuel for nuclear power plants can be provided entirely from friendly suppliers, with low price volatility, and long-term supplies stored on-site and not subject to weather disruptions. Existing nuclear power plants use mature technologies with a long experience of domestic expertise in operations, oversight, and regulation. More broadly, a well-functioning domestic civil nuclear “ecosystem” is intertwined with our space and military nuclear capabilities, such as the reactors that power our aircraft carriers and submarines.

Finally, we shouldn’t discount that nuclear power plants are today being built at an unprecedented rate by developing countries in Asia and the Middle East, driven by power demands for their growing industries and increasingly wealthy populations. Those new plants are as likely to be built and supplied by international competitors as they are our own domestic businesses and their employees. The United States has so far held a dominant position in preserving global safety and proliferation norms owing to the strength of our domestic nuclear capabilities. Looking forward, new nuclear power technologies are available that could improve plants’ performance and the affordability of the power they generate. But tomorrow’s nuclear technologies directly depend on a continuation of today’s nuclear workforce and know-how.

In today’s American energy system, our biggest challenges are now human, not machine. Nuclear power illustrates this: while these generators have sat producing a steady stream of electrons, year by year, the country and markets have shifted around them. As long as we keep the gas pedal down on energy research and development—which is important for the long term—our country’s universities and research labs will ensure that new technologies keep coming down the pipeline as fast as we can use them. Often what is holding us back now is a lack of strategy and the willingness to make the political and bureaucratic changes necessary to carry one out. Technology and markets are moving faster than governments.

Nuclear power operators after Chernobyl and Three Mile Island were famously described as being “hostages of each other.” Any mistake made by one would reflect on all of the others. In many ways, this was an opportunity that became the basis for the American operators’ effective program of industry self-regulation. Today that phrase may have a new meaning. In recent years, the country’s energy industry has become unfortunately politicized, with many of the same sorts of identity- and values-based appeals that have come to dominate our political campaigns.

Technologies or techniques are singled out for tribal attack or support, limited by a zero-sum mindset. In truth, the energy system is not something that can be won. Instead, it’s more like gardening: something that you have to keep working at and tending to. Fans of gas or nuclear, electric cars or oil exports, fracking or rooftop solar—in the end, all are linked by common markets and governments. Each shot red in anger ricochets through the system, sometimes with unexpected consequences. This is why, for example, we support a revenue-neutral carbon tax combined with a rollback of other technology-specific mandates, taxes, and subsidies that would go a long way toward leveling the playing field. Ultimately, a balanced and responsive approach that acknowledges the real trade-offs between affordability, reliability, social impacts, environmental performance, and global objectives is the best strategy for reaching—and maintaining over time—any one of those energy goals. Our energy system has more jobs than one.

So while we find ourselves with breathing room today, we know that the path ahead is filled with uncertainty. The unforeseen developments that have delivered us to this point today could once again carry us to an unexpected situation tomorrow. Renewable resource costs have fallen faster than expected—can that pace be maintained as systems pass from plug-and-play at the margins to unexplored territory on the widespread integration or even centrality of intermittent generation? Natural gas has seen a boon throughout the country—how comfortable are we in betting the future on its continued low cost ubiquity? Coal has always been available alongside nuclear on the grid as a reliable base-load backstop—can we take for granted that it will survive a new regulatory environment through a series of technological miracles? Taking control of the grid through the large-scale storage of power would revolutionize our relationship with electricity and should be relentlessly pursued—but what if our technology can not deliver by the time we need it?

We are optimists about our country’s energy future. We are also realists. This book is about the nuclear situation today. But it is a mistake to compare the known challenges of the present with the pristine potential of the new. If one was to describe a new power-generating technology with almost no pollution, practically limitless fuel supplies, reliable operations, scalable, and statistically far safer than existing alternatives, it would understandably sound like a miracle. Our energy needs would be solved. No wonder the early America advocates of nuclear fission were so excited. Experienced reality is always more complicated, of course. We should bring to bear this country’s best minds and technologies to navigate that process responsibly. We have been through a roller coaster on energy in this country that is not likely to stop. New challenges will emerge, as will new opportunities.

It is far too early to take nuclear off the table. 

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Nuclear Power Plants Advantages

Electricity enhances human productivity, maintains comfort and safety, and contributes to development of economy. Every person benefits of electricity everyday. While the majority of people do not think where the electricity comes from, the key source of electricity is nuclear power plant. Nuclear generated electricity is unique because it addresses different short-comings of other means to generate electricity. Nuclear power plants provide solutions to many problems in areas of economics, environment, sustainability, safety, and even waste disposal. Despite of all arguments, nuclear power plants are the cleanest, cheapest and most efficient source of electricity in the United States.

Worldwide, there are 440 nuclear power reactors operating in more than 30 countries and producing combined 16% of the world’s supply of energy (Holton 742). Nuclear generated energy account for 30% of Japan’s electric capacity. France, on the contrary, has the stable population and energy industry is 80% nuclear. UK, for example, gets around 25 percent of its electricity from nuclear power plants (Elliott 24). Currently, the Unites States operates 103 nuclear power plants and relies on nuclear energy for 20% of electricity. The rising population leads to the greater demand for energy, and subsequent greater number of nuclear power plants. The relative costs of nuclear energy vary, but in general, the up-front costs of nuclear energy are high while the cost of operation is very low.

According to the report drafted by Massachusetts Institute of Technology, the United States should resume the development of nuclear power in order to reduce greenhouse gas emissions (Holton 742). The study revealed four areas of concern: safety, cost, proliferation, and waste. Nuclear raw materials, like fossil fuel, come from the Earth. In particular, Uranium is mined and the environmental impact of mining is well-researched. However, one of the key advantages of nuclear power is that the great amount of power comes from a small amount of Uranium. It means that a very little amount of Uranium has to be mined to generate electricity. Therefore, the environmental impact of Uranium mining is much less compared to fossil fuel drilling.

In addition, nuclear fuel is solid and there is no environmental threat posed by transportation spillage. Unused nuclear fuel is insignificantly more radioactive compared to the natural. From environmental perspective, the environment remains free of nuclear fuel contamination. Notably, “ten years ago, when the board of directors of the Connecticut Yankee Atomic Power Company decided to close its reactor at Haddam Neck, nuclear power was widely considered, if not a dying industry, then one that was seriously and chronically ill” (Charman 26). Today, the situation is opposite and the increasing body of research indicates that the benefits exceed the drawbacks of nuclear power plants.

Advocates, international bureaucrats, government officials, economists, academics, and journalists agree that nuclear power is able to save the global community from devastating climate change (Charman 26). Nuclear reactors do not emit carbon dioxide or other greenhouse gases when the atoms are split to create electricity. At the same time, nuclear power is promoted as one of the most economic electricity sources – the production cost of 1.68 cents per kilowatthour compared to 1.9 cents per kilowatthour for coal and 2.48 cents per kilowatthour for solar energy. Moreover, while oil and gas plants must be located close to pipelines, the nuclear power plants are relatively self-sufficient.

The opponents argue that nuclear power plants in the United States produce a small amount of waste. Although the waste is radioactive, all of the kinds of radiation are at low levels, naturally part of our environment. All processes produce waste and the waste from a power plant can be highly radioactive. However, nuclear fuel can be contained, treated, reduced, and recycled. The chemical hazards maintain their nature for indefinite period of time; the nuclear waste can be even preferable. In addition, the nuclear plants are safe. Leaving aside the accidents at Chernobyl in Ukraine and Three Mile Island in the United States, not a single fatality occurred in the result of the operation of nuclear power plant in the Europe Japan, or the United States.

The types of emissions occurring in nuclear power plants are: (1) neutrons leaving a nucleus of the same charge but one unit less in mass; (2) alpha particles leaving a decay product with nucleus with lower atomic and mass numbers; (3) electrons with no significant change in mass; and (4) gamma radiation which is electromagnetic radiation which can be emitted with each type of radiation (Burton 4). Scientists do not oppose nuclear power plants; however, they think that there are better choices. Today, the spent nuclear fuel is stored in the places it is not meant to be. Even though there is no threat, it could be (Holton 742).

Human activities depend upon the supply of electricity. The supply of fossil fuels is limited and may not last for more than 100 years. Wind and solar energy sources can be the solutions to sustain the world with power; however, the potential for power generation from the very small amount of Uranium is much greater. The breeder reactors, for example are constructed in the way that new fuel is created as the byproduct of the fuel usage. Uranium available in world oceans and the earth crust is enough to last for unlimited number of years.

The nuclear electric power industry has achieved the major improvements in its reliability (Apt et al 51). At the time of Three Mile Island accident, the U.S. nuclear plants were online only 58% of the time, while today they are producing electricity 91% of the time. In addition, the regular evaluations of nuclear electric generators are based on comparing the performance of the plant to the metrics emphasizing reliability and safety. These metrics include unplanned automatic interruptions, online time percentage, safety system performance, industry safety, chemistry and fuel defects, and plant emissions. The performance goals are set for each type of the plant and are strictly controlled by the World Association of Nuclear Operators.

Despite all controversies, the U.S. nuclear power increases its contribution to electricity supply. The problems of nuclear power are well-researched; however, many Americans remain concerned about the questions of safety and the disposal of nuclear waste, nuclear proliferation and economic viability (Lorenzini 31). The real advantage of the nuclear energy is its potency meaning that nuclear energy potential is vast and sustainable as long-term resource. Producing nuclear fuel requires minor exploration, mining, collection, and transportation. Nuclear plant requires only one refueling per year, while the coal plant requires 80 rail cars of coal per day (Lorenzini 31).

The human health advantages of nuclear power over coal are well-researched as well. The studies by the American Medical Association, the U.S. Environmental Protection Agency, the Norwegian Ministry of Oil and Energy, the Stanford Research Institute, an the National Academic of Sciences point out that coal is more hazardous, both to human health and the environment, than nuclear power (Lorenzini 31). The opposition to nuclear power is blind and not based on real facts. Moreover, the coal burning is the largest source of environmental contamination from electricity production, while the emissions of nuclear power plants are insignificant.

In addition, nuclear power plants contribute to reduction of the dependence on oil as the source of energy. Nuclear energy displaces the millions of barrels each year and reduces the trade deficits – it leads to the increased gross domestic product. Combined with the fact that nuclear plants produce electricity through the fission, not burning, nuclear power plants do not pollute air and water with dust or greenhouse gases. Nuclear wastes are isolated from the environment, while the burning of the coal remains dangerous for thousands of years.

Undoubtedly, the nuclear power plant operations cannot be free of risk; however, the Chernobyl tragedy had one positive result: the increased awareness and commitment of international community to ensuring safety. In conclusion, the long-term nature of nuclear power, the economic benefits, zero-emissions nature, opportunity to combat global warming and pollution, contribute to increasing number of nuclear power plants in the United States and worldwide. The fear of radiological emissions is caused by the misunderstanding of nuclear power and the operating process. Nuclear power plants are safer, cleaner, and more viable economically compared to other sources of energy.

Works Cited

Apt, Jay, Lave, Lester, and Granger Morgan. “Power Play: A More Reliable U.S. Electric System; U.S. Utilities Have a Lot to Learn about Avoiding Power Outages. They Can Benefit from the Experience of Foreign Utilities, Other U.S. Industries, and Even Their Own Nuclear Power Plants.” Issues in Science and Technology 22.4 (2006): 51.

Burton, Bob. Nuclear Power, Pollution and Politics . London: Routledge, 2003.

Charman, Karen. “Brave Nuclear World? the Planet Is Warming, and Proponents of Nuclear Power Say They’ve Got the Answer. Are Nuclear Plants the Climate Cavalry?” World Watch 19.3 (2006): 26.

Elliott, David. Energy, Society & Environment . New York, Routledge, 2003.

Holton, Conard. “Power Surge: Renewed Interest in Nuclear Energy.” Environmental Health Perspectives 113.11 (2005): 742.

Lorenzini, Paul. “A Second Look at Nuclear Power: By Overlooking Nuclear Power in the Quest for Clean Energy, We Are Condemning Ourselves to a Future of Increased Fossil Fuel Use.” Issues in Science and Technology 21.3 (2005): 31.

How to make up your mind about the pros and cons of nuclear power

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Disclosure statement

François Graner does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond his academic appointment.

Stefano Panebianco does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond his academic appointment.

Université Paris Cité provides funding as a member of The Conversation FR.

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French president Emmanuel Macron has recently announced that France will invest €1 billion into nuclear power, and build more reactors by 2030 to help stave off Europe’s energy crisis.

But even in France, where nuclear provides more than 70% of the country’s energy mix, the issue is controversial.

The debate is particularly polarised among those who live near nuclear power plants, depending on whether or not they profit either materially or symbolically from this proximity. There is also a constant tension between the press and the nuclear sector over coverage of the industry.

Decades since the first nuclear power plant was built, the debate is still hindered by misunderstandings over both the advantages and drawbacks of this technology.

Contrasting views

As physicists, the two of us mainly agree on the scientific and technological basics of the debate, and on every argument based on verifiable facts. But our different sensibilities as citizens lead us to weigh each argument differently and reach different conclusions on nuclear power.

One of us (Stefano Panebianco) estimates that the advantages of this technology make it a viable choice for the future, while the other (François Graner) estimates that our efforts should focus on a significant decrease in our energy consumption.

By drawing on our contrasting views based on a shared understanding of the scientific evidence, we want to help others form an opinion by listing the pros and cons of nuclear power using the rigorous methods of our everyday life as scientists.

To do so, we asked experts from across the spectrum, including physicists, economists, political scientists, anthropologists, historians, journalists, and NGO volunteers to contribute to a review of the major questions relating to nuclear power. The collected works do not provide a conclusion: we leave it to the readers to draw their own.

So, how should you make up your mind? Here are the basics.

Making choices about the future

The physics underlying nuclear production of electricity are well known . It is rather the industrialisation of the process that raises questions.

Scientific and technological research organisations try to anticipate future energy needs and develop new types of nuclear reactors to replace existing ones. Such research should not predict future choices to be made by politicians and society. However, it is a long-term process which often takes several decades of research, design, development and experimentation before approval, and hence the choices of research directions today can be somewhat binding for the future.

For instance, the study of fast neutron breeder reactor design and optimisation is a long-standing research field. This would allow nuclear fuel to be recycled, which would preserve natural uranium resources and reduce nuclear waste.

In France, two successive demonstrators, Phenix and Super-Phenix , were built and operated last century and a third one, Astrid , was planned in recent years. However, all of these projects have been subject to successive government decisions to pursue, stop, resume, and recently in the case of Astrid, stop again, or at least defer. These decisions were made based on economic, environmental, political and strategical criteria.

How much does it cost?

Natural uranium, which is used as fuel in power plants, is still a relatively abundant resource and does not yet contribute much to the total cost of nuclear energy.

The French Court of Auditors estimated the current average generation cost of nuclear energy for a life-span of 50 years at €60 per megawatt-hour , equivalent to six cents per kilowatt-hour. Though comparisons with other electricity sources are difficult to make, the highly variable public sale price of electricity is around 15 cents per kilowatt-hour.

Cost estimates heavily depend on hypotheses about the future, including the prolongation of power plant duration, waste choices and the decommissioning of reactors. Although decisions are often taken within the short-term vision of an electoral mandate, waste policy must take long-term implications into account .

Meanwhile, the technical feasibility of decommissioning is still hard to predict owing to different levels of understanding of the various reactor types. To maintain or decommission a nuclear power plant requires anticipation in term of money, know-how and energy, and so largely engages the next generations.

Nuclear power thus requires long-term political, financial and geological stability.

Is it safe?

In public debates about safety, a purely technical subject has been transformed into a political one.

Radioactivity must be controlled throughout all stages of the nuclear fuel chain to prevent any harmful effects on either humans or the environment. The risk of nuclear accidents , whether related to natural events, human error, waste, malice or war, has been addressed over the decades by significant improvements and by experience feedback from the two main accidents of Chernobyl and Fukushima. However, it remains a major preoccupation for the general public.

Preventing accidents involves many factors, including the human one; the know-how and motivation of workers depend on a strong partnership between operator and subcontractors .

Other environmental impacts during normal operations include the exposure of nuclear workers and the public to chemical or thermal emissions : the latter becomes problematic with the global warming, as river water required to run reactors becomes scarce and warmer.

Does nuclear have a role in fighting climate change?

What is the future of nuclear power? Scientists cannot make predictions. Instead, scenarios are useful tools for examining possible consequences and costs of hypotheses or choices, for instance by decreasing greenhouse gas emissions or even decreasing energy demand .

The fact that nuclear power plants do not emit carbon, at least during the phase of electricity production (as opposed to the whole fuel and plant life cycles), is an argument to consider in the context of bringing down global emissions.

Nuclear plants also deliver constant power, which is a drawback in terms of adaptation to demand, but an advantage in terms of regularity: development of intermittent renewable energies such as solar and wind exert pressure on electricity distribution networks , as these energies are not necessarily always available at peak times.

The role of politics

In practice, global energy transition scenarios are often used to establish and endorse choices that have already been made .

Globally, the decisions which have actually been taken rely heavily on geopolitics, for instance attempts to bring down reliance on petrol imports, and also decisions to develop military nuclear power alongside energy policy.

The dual system of funding civil and military research alongside one another is only justified if nuclear weapons are developed, which is again a political decision.

Why it’s so hard to decide

In deciding what to think about nuclear power, the list of arguments to take into account is frustratingly large , and many are coupled together. For instance, some reactors, loaded with the so-called mixed uranium and plutonium oxide fuel, partly contribute to recycle some nuclear products. Shutting them down could have the side effect of filling the current waste storage facilities more quickly than expected.

Even worse, decisions are often based on speculative hypotheses due to the difficulty of prediction. What is beyond doubt is that any decision taken or not taken today will affect future generations more than our own.

This means citizens should not leave decisions to be taken only on the basis of scientific or technical arguments, but should make up their own minds, taking into account the political and societal horizon they want for themselves and their children.

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What is nuclear energy and is it a viable resource?

Nuclear energy's future as an electricity source may depend on scientists' ability to make it cheaper and safer.

Nuclear power is generated by splitting atoms to release the energy held at the core, or nucleus, of those atoms. This process, nuclear fission, generates heat that is directed to a cooling agent—usually water. The resulting steam spins a turbine connected to a generator, producing electricity.

About 450 nuclear reactors provide about 11 percent of the world's electricity. The countries generating the most nuclear power are, in order, the United States, France, China, Russia, and South Korea.

The most common fuel for nuclear power is uranium, an abundant metal found throughout the world. Mined uranium is processed into U-235, an enriched version used as fuel in nuclear reactors because its atoms can be split apart easily.

In a nuclear reactor, neutrons—subatomic particles that have no electric charge—collide with atoms, causing them to split. That collision—called nuclear fission—releases more neutrons that react with more atoms, creating a chain reaction. A byproduct of nuclear reactions, plutonium , can also be used as nuclear fuel.

Types of nuclear reactors

In the U.S. most nuclear reactors are either boiling water reactors , in which the water is heated to the boiling point to release steam, or pressurized water reactors , in which the pressurized water does not boil but funnels heat to a secondary water supply for steam generation. Other types of nuclear power reactors include gas-cooled reactors, which use carbon dioxide as the cooling agent and are used in the U.K., and fast neutron reactors, which are cooled by liquid sodium.

Nuclear energy history

The idea of nuclear power began in the 1930s , when physicist Enrico Fermi first showed that neutrons could split atoms. Fermi led a team that in 1942 achieved the first nuclear chain reaction, under a stadium at the University of Chicago. This was followed by a series of milestones in the 1950s: the first electricity produced from atomic energy at Idaho's Experimental Breeder Reactor I in 1951; the first nuclear power plant in the city of Obninsk in the former Soviet Union in 1954; and the first commercial nuclear power plant in Shippingport, Pennsylvania, in 1957. ( Take our quizzes about nuclear power and see how much you've learned: for Part I, go here ; for Part II, go here .)

Nuclear power, climate change, and future designs

Nuclear power isn't considered renewable energy , given its dependence on a mined, finite resource, but because operating reactors do not emit any of the greenhouse gases that contribute to global warming , proponents say it should be considered a climate change solution . National Geographic emerging explorer Leslie Dewan, for example, wants to resurrect the molten salt reactor , which uses liquid uranium dissolved in molten salt as fuel, arguing it could be safer and less costly than reactors in use today.

Others are working on small modular reactors that could be portable and easier to build. Innovations like those are aimed at saving an industry in crisis as current nuclear plants continue to age and new ones fail to compete on price with natural gas and renewable sources such as wind and solar.

The holy grail for the future of nuclear power involves nuclear fusion, which generates energy when two light nuclei smash together to form a single, heavier nucleus. Fusion could deliver more energy more safely and with far less harmful radioactive waste than fission, but just a small number of people— including a 14-year-old from Arkansas —have managed to build working nuclear fusion reactors. Organizations such as ITER in France and Max Planck Institute of Plasma Physics are working on commercially viable versions, which so far remain elusive.

Nuclear power risks

When arguing against nuclear power, opponents point to the problems of long-lived nuclear waste and the specter of rare but devastating nuclear accidents such as those at Chernobyl in 1986 and Fukushima Daiichi in 2011 . The deadly Chernobyl disaster in Ukraine happened when flawed reactor design and human error caused a power surge and explosion at one of the reactors. Large amounts of radioactivity were released into the air, and hundreds of thousands of people were forced from their homes . Today, the area surrounding the plant—known as the Exclusion Zone—is open to tourists but inhabited only by the various wildlife species, such as gray wolves , that have since taken over .

In the case of Japan's Fukushima Daiichi, the aftermath of the Tohoku earthquake and tsunami caused the plant's catastrophic failures. Several years on, the surrounding towns struggle to recover, evacuees remain afraid to return , and public mistrust has dogged the recovery effort, despite government assurances that most areas are safe.

Other accidents, such as the partial meltdown at Pennsylvania's Three Mile Island in 1979, linger as terrifying examples of nuclear power's radioactive risks. The Fukushima disaster in particular raised questions about safety of power plants in seismic zones, such as Armenia's Metsamor power station.

Other issues related to nuclear power include where and how to store the spent fuel, or nuclear waste, which remains dangerously radioactive for thousands of years. Nuclear power plants, many of which are located on or near coasts because of the proximity to water for cooling, also face rising sea levels and the risk of more extreme storms due to climate change.

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• Nuclear energy
• Top pros and cons of...

The top pros and cons of nuclear energy

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• Jacob Marsh

As subject matter experts, we provide only objective information. We design every article to provide you with deeply-researched, factual, useful information so that you can make informed home electrification and financial decisions. We have:

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As with any energy source, renewable or non-renewable, there are pros and cons to using nuclear energy. We'll review some of these top benefits and drawbacks to keep in mind when comparing nuclear to other energy sources.

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Top pros and cons of nuclear energy

Despite the limited development of nuclear power plants recently, nuclear energy still supplies about 20 percent of U.S. electricity. As with any energy source, it comes with various advantages and disadvantages. Here are just a few top ones to keep in mind:

Pros and cons of nuclear power

On the pros side, nuclear energy is a carbon-free electricity source (with other environmental benefits as well!). It needs a relatively small land area to operate and is a great energy source for reliable baseload power for the electric grid. On the cons side, nuclear is technically a non-renewable energy source, nuclear plants have a high up-front cost associated with them, and nuclear waste and the operation of nuclear plants pose some environmental and health challenges.

Below, we'll explore these pros and cons in further detail.

Advantages of nuclear energy

Here are four advantages of nuclear energy:

Carbon-free electricity

Small land footprint, high power output, reliable energy source.

While traditional fossil fuel generation sources pump massive amounts of carbon dioxide (the primary cause of global climate change) into the atmosphere, nuclear energy plants do not produce carbon dioxide, or any air pollution, during operation. That's not to say that they don't pollute at all, though - mining, refining, and preparing uranium use energy, and nuclear waste pose a completely separate environmental problem. We'll discuss nuclear waste's role in all this later on.

Nuclear energy plants take up far less physical space than other common clean energy facilities (particularly wind and solar power). According to the Department of Energy, a typical nuclear facility producing 1,000 megawatts (MW) of electricity takes up about one square mile of space. Comparatively, a wind farm producing the same amount of energy takes 360x more land area, and a large-scale solar farm uses 75x more space. That's 431 wind turbines or 3.125 million (!!!) solar panels. Check out this graphic from the Department of Energy for more fun comparisons of energy sources, like how many Corvettes are needed to produce the same amount of energy as one nuclear reactor.

Nuclear power plants produce high energy levels compared to most power sources (especially renewables), making them a great provider of baseload electricity. "Baseload electricity" simply means the minimum level of energy demand on the grid over some time, say a week. Nuclear has the potential to be this high-output baseload source, and we're headed that way - since 1990, nuclear power plants have generated 20% of the US's electricity. Additionally, nuclear is a prime candidate for replacing current baseload electricity sources that contribute significantly to air pollution, such as large coal plants.

Lastly, nuclear energy is a reliable renewable energy source based on its constant production and accessibility. Nuclear power plants produce their maximum power output more often (93% of the time) than any other energy source, and because of this round-the-clock stability, makes nuclear energy an ideal source of reliable baseload electricity for the grid.

Disadvantages of nuclear energy

Here are four disadvantages of nuclear energy:

Uranium is technically non-renewable

Very high upfront costs

Nuclear waste

Malfunctions can be catastrophic, uranium is non-renewable.

Although nuclear energy is a "clean" source of power, it is technically not renewable. Current nuclear technology relies on uranium ore for fuel, which exists in limited amounts in the earth's crust. The longer we rely on nuclear power (and uranium ore in particular), the more depleted the earth's uranium resources will become, which will drive up the cost of extracting it and the negative environmental impacts of mining and processing the uranium.

High upfront costs

Operating a nuclear energy plant is a relatively low-cost endeavor, but building it in the first place is very expensive. Nuclear reactors are complex devices that require many levels of safety built around them, which drives up the cost of new nuclear plants. 

And now, to the thorny issue of nuclear waste – we could write hundreds of articles about the science of nuclear waste, its political implications, cost/benefit analyses, and more regarding this particular subject. The key takeaway from that would be this: nuclear waste is a complicated issue, and we won't claim to be anything near experts . Nuclear waste is radioactive, making it an environmental and health catastrophe waiting to happen. These reasons are exactly why governments spend tons of money to safely package and dispose of used-up nuclear fuel. At the end of the day, yes, nuclear waste is a dangerous by-product of nuclear power plants, and it takes extreme care and advanced technology to handle it properly.

A nuclear meltdown occurs when the heat created by a nuclear reactor exceeds the amount of heat being transferred out by the cooling systems; this causes the system to exceed its melting point. If this happens, hot radioactive vapors can escape, which can cause nuclear plants to melt down fully and combust, releasing harmful radioactive materials into the environment. This is an extremely unlikely worst-case scenario, and nuclear plants are equipped with numerous safety measures to prevent meltdowns.

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Essay on Nuclear Energy in 500+ words for School Students 

• Updated on  
• Dec 30, 2023

Essay on Nuclear Energy: Nuclear energy has been fascinating and controversial since the beginning. Using atomic power to generate electricity holds the promise of huge energy supplies but we cannot overlook the concerns about safety, environmental impact, and the increase in potential weapon increase. 

The blog will help you to explore various aspects of energy seeking its history, advantages, disadvantages, and role in addressing the global energy challenge. 

Table of Contents

• 1 History Overview
• 2 Nuclear Technology 
• 3 Advantages of Nuclear Energy
• 4 Disadvantages of Nuclear Energy
• 5 Safety Measures and Regulations of Nuclear Energy
• 6 Concerns of Nuclear Proliferation
• 7 Future Prospects and Innovations of Nuclear Energy
• 8 FAQs 

Also Read: Find List of Nuclear Power Plants In India

History Overview

The roots of nuclear energy have their roots back to the early 20th century when innovative discoveries in physics laid the foundation for understanding atomic structure. In the year 1938, Otto Hahn, a German chemist and Fritz Stassman, a German physical chemist discovered nuclear fission, the splitting of atomic nuclei. This discovery opened the way for utilising the immense energy released during the process of fission. 

Also Read: What are the Different Types of Energy?

Nuclear Technology 

Nuclear power plants use controlled fission to produce heat. The heat generated is further used to produce steam, by turning the turbines connected to generators that produce electricity. This process takes place in two types of reactors: Pressurized Water Reactors (PWR) and Boiling Water Reactors (BWR). PWRs use pressurised water to transfer heat. Whereas, BWRs allow water to boil, which produces steam directly. 

Also Read: Nuclear Engineering Course: Universities and Careers

Advantages of Nuclear Energy

Let us learn about the positive aspects of nuclear energy in the following:

1. High Energy Density

Nuclear energy possesses an unparalleled energy density which means that a small amount of nuclear fuel can produce a substantial amount of electricity. This high energy density efficiency makes nuclear power reliable and powerful.

2. Low Greenhouse Gas Emissions

Unlike other traditional fossil fuels, nuclear power generation produces minimum greenhouse gas emissions during electricity generation. The low greenhouse gas emissions feature positions nuclear energy as a potential solution to weakening climate change.

3. Base Load Power

Nuclear power plants provide consistent, baseload power, continuously operating at a stable output level. This makes nuclear energy reliable for meeting the constant demand for electricity, complementing intermittent renewable sources of energy like wind and solar. 

Also Read: How to Become a Nuclear Engineer in India?

Disadvantages of Nuclear Energy

After learning the pros of nuclear energy, now let’s switch to the cons of nuclear energy.

1. Radioactive Waste

One of the most important challenges that is associated with nuclear energy is the management and disposal of radioactive waste. Nuclear power gives rise to spent fuel and other radioactive byproducts that require secure, long-term storage solutions.

2. Nuclear Accidents

The two catastrophic accidents at Chornobyl in 1986 and Fukushima in 2011 underlined the potential risks of nuclear power. These nuclear accidents can lead to severe environmental contamination, human casualties, and long-lasting negative perceptions of the technology. 

3. High Initial Costs

The construction of nuclear power plants includes substantial upfront costs. Moreover, stringent safety measures contribute to the overall expenses, which makes nuclear energy economically challenging compared to some renewable alternatives. 

Also Read: What is the IAEA Full Form?

Safety Measures and Regulations of Nuclear Energy

After recognizing the potential risks associated with nuclear energy, strict safety measures and regulations have been implemented worldwide. These safety measures include reactor design improvements, emergency preparedness, and ongoing monitoring of the plant operations. Regulatory bodies, such as the Nuclear Regulatory Commission (NRC) in the United States, play an important role in overseeing and enforcing safety standards. 

Also Read: What is the Full Form of AEC?

Concerns of Nuclear Proliferation

The dual-use nature of nuclear technology raises concerns about the spread of nuclear weapons. The same nuclear technology used for the peaceful generation of electricity can be diverted for military purposes. International efforts, including the Treaty on the Non-Proliferation of Nuclear Weapons (NPT), aim to help the proliferation of nuclear weapons and promote the peaceful use of nuclear energy. 

Also Read: Dr. Homi J. Bhabha’s Education, Inventions & Discoveries

Future Prospects and Innovations of Nuclear Energy

The ongoing research and development into advanced reactor technologies are part of nuclear energy. Concepts like small modular reactors (SMRs) and Generation IV reactors aim to address safety, efficiency, and waste management concerns. Moreover, the exploration of nuclear fusion as a clean and virtually limitless energy source represents an innovation for future energy solutions. 

Nuclear energy stands at the crossroads of possibility and peril, offering the possibility of addressing the world´s growing energy needs while posing important challenges. Striking a balance between utilising the benefits of nuclear power and alleviating its risks requires ongoing technological innovation, powerful safety measures, and international cooperation. 

As we drive the complexities of perspective challenges of nuclear energy, the role of nuclear energy in the global energy mix remains a subject of ongoing debate and exploration. 

Also Read: Essay on Science and Technology for Students: 100, 200, 350 Words

Ans. Nuclear energy is the energy released during nuclear reactions. Its importance lies in generating electricity, medical applications, and powering spacecraft.

Ans. Nuclear energy is exploited from the nucleus of atoms through processes like fission or fusion. It is a powerful and controversial energy source with applications in power generation and various technologies. 

Ans. The five benefits of nuclear energy include: 1. Less greenhouse gas emissions 2. High energy density 3. Continuos power generation  4. Relatively low fuel consumption 5. Potential for reducing dependence on fossil fuels

Ans. Three important facts about nuclear energy: a. Nuclear fission releases a significant amount of energy. b. Nuclear power plants use controlled fission reactions to generate electricity. c. Nuclear fusion, combining atomic nuclei, is a potential future energy source.

Ans. Nuclear energy is considered best due to its low carbon footprint, high energy output, and potential to address energy needs. However, concerns about safety, radioactive waste, and proliferation risk are challenges that need careful consideration.

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Deepika Joshi

Deepika Joshi is an experienced content writer with expertise in creating educational and informative content. She has a year of experience writing content for speeches, essays, NCERT, study abroad and EdTech SaaS. Her strengths lie in conducting thorough research and ananlysis to provide accurate and up-to-date information to readers. She enjoys staying updated on new skills and knowledge, particulary in education domain. In her free time, she loves to read articles, and blogs with related to her field to further expand her expertise. In personal life, she loves creative writing and aspire to connect with innovative people who have fresh ideas to offer.

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Nuclear energy is the energy in the nucleus , or core, of an atom . Atoms are tiny units that make up all matter in the universe , and energy is what holds the nucleus together. There is a huge amount of energy in an atom 's dense nucleus . In fact, the power that holds the nucleus together is officially called the " strong force ." Nuclear energy can be used to create electricity , but it must first be released from the atom . In the process of  nuclear fission , atoms are split to release that energy. A nuclear reactor , or power plant , is a series of machines that can control nuclear fission to produce electricity . The fuel that nuclear reactors use to produce nuclear fission is pellets of the element uranium . In a nuclear reactor , atoms of uranium are forced to break apart. As they split, the atoms release tiny particles called fission products. Fission products cause other uranium atoms to split, starting a chain reaction . The energy released from this chain reaction creates heat. The heat created by nuclear fission warms the reactor's cooling agent . A cooling agent is usually water, but some nuclear reactors use liquid metal or molten salt . The cooling agent , heated by nuclear fission , produces steam . The steam turns turbines , or wheels turned by a flowing current . The turbines drive generators , or engines that create electricity . Rods of material called nuclear poison can adjust how much electricity is produced. Nuclear poisons are materials, such as a type of the element xenon , that absorb some of the fission products created by nuclear fission . The more rods of nuclear poison that are present during the chain reaction , the slower and more controlled the reaction will be. Removing the rods will allow a stronger chain reaction and create more electricity . As of 2011, about 15 percent of the world's electricity is generated by nuclear power plants . The United States has more than 100 reactors, although it creates most of its electricity from fossil fuels and hydroelectric energy . Nations such as Lithuania, France, and Slovakia create almost all of their electricity from nuclear power plants . Nuclear Food: Uranium Uranium is the fuel most widely used to produce nuclear energy . That's because uranium atoms split apart relatively easily. Uranium is also a very common element, found in rocks all over the world. However, the specific type of uranium used to produce nuclear energy , called U-235 , is rare. U-235 makes up less than one percent of the uranium in the world.

Although some of the uranium the United States uses is mined in this country, most is imported . The U.S. gets uranium from Australia, Canada, Kazakhstan, Russia, and Uzbekistan. Once uranium is mined, it must be extracted from other minerals . It must also be processed before it can be used. Because nuclear fuel can be used to create nuclear weapons as well as nuclear reactors , only nations that are part of the Nuclear Non-Proliferation Treaty (NPT) are allowed to import uranium or plutonium , another nuclear fuel . The treaty promotes the peaceful use of nuclear fuel , as well as limiting the spread of nuclear weapons . A typical nuclear reactor uses about 200 tons of uranium every year. Complex processes allow some uranium and plutonium to be re-enriched or recycled . This reduces the amount of mining , extracting , and processing that needs to be done. Nuclear Energy and People Nuclear energy produces electricity that can be used to power homes, schools, businesses, and hospitals. The first nuclear reactor to produce electricity was located near Arco, Idaho. The Experimental Breeder Reactor began powering itself in 1951. The first nuclear power plant designed to provide energy to a community was established in Obninsk, Russia, in 1954. Building nuclear reactors requires a high level of technology , and only the countries that have signed the Nuclear Non-Proliferation Treaty can get the uranium or plutonium that is required. For these reasons, most nuclear power plants are located in the developed world. Nuclear power plants produce renewable, clean energy . They do not pollute the air or release  greenhouse gases . They can be built in urban or rural areas , and do not radically alter the environment around them. The steam powering the turbines and generators is ultimately recycled . It is cooled down in a separate structure called a cooling tower . The steam turns back into water and can be used again to produce more electricity . Excess steam is simply recycled into the atmosphere , where it does little harm as clean water vapor . However, the byproduct of nuclear energy is radioactive material. Radioactive material is a collection of unstable atomic nuclei . These nuclei lose their energy and can affect many materials around them, including organisms and the environment. Radioactive material can be extremely toxic , causing burns and increasing the risk for cancers , blood diseases, and bone decay .

Radioactive waste is what is left over from the operation of a nuclear reactor . Radioactive waste is mostly protective clothing worn by workers, tools, and any other material that have been in contact with radioactive dust. Radioactive waste is long-lasting. Materials like clothes and tools can stay radioactive for thousands of years. The government regulates how these materials are disposed of so they don't contaminate anything else. Used fuel and rods of nuclear poison are extremely radioactive . The used uranium pellets must be stored in special containers that look like large swimming pools. Water cools the fuel and insulates the outside from contact with the radioactivity. Some nuclear plants store their used fuel in dry storage tanks above ground. The storage sites for radioactive waste have become very controversial in the United States. For years, the government planned to construct an enormous nuclear waste facility near Yucca Mountain, Nevada, for instance. Environmental groups and local citizens protested the plan. They worried about radioactive waste leaking into the water supply and the Yucca Mountain environment, about 130 kilometers (80 miles) from the large urban area of Las Vegas, Nevada. Although the government began investigating the site in 1978, it stopped planning for a nuclear waste facility in Yucca Mountain in 2009. Chernobyl Critics of nuclear energy worry that the storage facilities for radioactive waste will leak, crack, or erode . Radioactive material could then contaminate the soil and groundwater near the facility . This could lead to serious health problems for the people and organisms in the area. All communities would have to be evacuated . This is what happened in Chernobyl, Ukraine, in 1986. A steam explosion at one of the power plants four nuclear reactors caused a fire, called a plume . This plume was highly radioactive , creating a cloud of radioactive particles that fell to the ground, called fallout . The fallout spread over the Chernobyl facility , as well as the surrounding area. The fallout drifted with the wind, and the particles entered the water cycle as rain. Radioactivity traced to Chernobyl fell as rain over Scotland and Ireland. Most of the radioactive fallout fell in Belarus.

The environmental impact of the Chernobyl disaster was immediate . For kilometers around the facility , the pine forest dried up and died. The red color of the dead pines earned this area the nickname the Red Forest . Fish from the nearby Pripyat River had so much radioactivity that people could no longer eat them. Cattle and horses in the area died. More than 100,000 people were relocated after the disaster , but the number of human victims of Chernobyl is difficult to determine . The effects of radiation poisoning only appear after many years. Cancers and other diseases can be very difficult to trace to a single source. Future of Nuclear Energy Nuclear reactors use fission, or the splitting of atoms , to produce energy. Nuclear energy can also be produced through fusion, or joining (fusing) atoms together. The sun, for instance, is constantly undergoing nuclear fusion as hydrogen atoms fuse to form helium . Because all life on our planet depends on the sun, you could say that nuclear fusion makes life on Earth possible. Nuclear power plants do not have the capability to safely and reliably produce energy from nuclear fusion . It's not clear whether the process will ever be an option for producing electricity . Nuclear engineers are researching nuclear fusion , however, because the process will likely be safe and cost-effective.

Nuclear Tectonics The decay of uranium deep inside the Earth is responsible for most of the planet's geothermal energy, causing plate tectonics and continental drift.

Three Mile Island The worst nuclear accident in the United States happened at the Three Mile Island facility near Harrisburg, Pennsylvania, in 1979. The cooling system in one of the two reactors malfunctioned, leading to an emission of radioactive fallout. No deaths or injuries were directly linked to the accident.

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• v.45(Suppl 1); 2016 Jan

Nuclear power in the 21st century: Challenges and possibilities

Akos horvath.

MTA Centre for Energy Research, KFKI Campus, P.O.B. 49, Budapest 114, 1525 Hungary

Elisabeth Rachlew

Department of Physics, Royal Institute of Technology, KTH, 10691 Stockholm, Sweden

The current situation and possible future developments for nuclear power—including fission and fusion processes—is presented. The fission nuclear power continues to be an essential part of the low-carbon electricity generation in the world for decades to come. There are breakthrough possibilities in the development of new generation nuclear reactors where the life-time of the nuclear waste can be reduced to some hundreds of years instead of the present time-scales of hundred thousand of years. Research on the fourth generation reactors is needed for the realisation of this development. For the fast nuclear reactors, a substantial research and development effort is required in many fields—from material sciences to safety demonstration—to attain the envisaged goals. Fusion provides a long-term vision for an efficient energy production. The fusion option for a nuclear reactor for efficient production of electricity has been set out in a focussed European programme including the international project of ITER after which a fusion electricity DEMO reactor is envisaged.

Introduction

All countries have a common interest in securing sustainable, low-cost energy supplies with minimal impact on the environment; therefore, many consider nuclear energy as part of their energy mix in fulfilling policy objectives. The discussion of the role of nuclear energy is especially topical for industrialised countries wishing to reduce carbon emissions below the current levels. The latest report from IPCC WGIII ( 2014 ) (see Box 1 for explanations of all acronyms in the article) says: “Nuclear energy is a mature low-GHG emission source of base load power, but its share of global electricity has been declining since 1993. Nuclear energy could make an increasing contribution to low-carbon energy supply, but a variety of barriers and risks exist ”.

Demand for electricity is likely to increase significantly in the future, as current fossil fuel uses are being substituted by processes using electricity. For example, the transport sector is likely to rely increasingly on electricity, whether in the form of fully electric or hybrid vehicles, either using battery power or synthetic hydrocarbon fuels. Here, nuclear power can also contribute, via generation of either electricity or process heat for the production of hydrogen or other fuels.

In Europe, in particular, the public opinion about safety and regulations with nuclear power has introduced much critical discussions about the continuation of nuclear power, and Germany has introduced the “Energiewende” with the goal to close all their nuclear power by 2022. The contribution of nuclear power to the electricity production in the different countries in Europe differs widely with some countries having zero contribution (e.g. Italy, Lithuania) and some with the major part comprising nuclear power (e.g. France, Hungary, Belgium, Slovakia, Sweden).

Current status

The use of nuclear energy for commercial electricity production began in the mid-1950s. In 2013, the world’s 392 GW of installed nuclear capacity accounted for 11 % of electricity generation produced by around 440 nuclear power plants situated in 30 countries (Fig.  1 ). This share has declined gradually since 1996, when it reached almost 18 %, as the rate of new nuclear additions (and generation) has been outpaced by the expansion of other technologies. After hydropower, nuclear is the world’s second-largest source of low-carbon electricity generation (IEA 2014 1 ).

Total number of operating nuclear reactors worldwide. The total number of reactors also include six in Taiwan (source: IAEA 2015) ( https://www.iaea.org/newscenter/focus/nuclear-power )

The Country Nuclear Power Profiles (CNPP 2 ) compiles background information on the status and development of nuclear power programmes in member states. The CNPP’s main objectives are to consolidate information about the nuclear power infrastructures in participating countries, and to present factors related to the effective planning, decision-making and implementation of nuclear power programmes that together lead to safe and economical operations of nuclear power plants.

Within the European Union, 27 % of electricity production (13 % of primary energy) is obtained from 132 nuclear power plants in January 2015 (Fig.  1 ). Across the world, 65 new reactors are under construction, mainly in Asia (China, South Korea, India), and also in Russia, Slovakia, France and Finland. Many other new reactors are in the planning stage, including for example, 12 in the UK.

Apart from one first Generation “Magnox” reactor still operating in the UK, the remainder of the operating fleet is of the second or third Generation type (Fig.  2 ). The predominant technology is the Light Water Reactor (LWR) developed originally in the United States by Westinghouse and then exploited massively by France and others in the 1970s as a response to the 1973 oil crisis. The UK followed a different path and pursued the Advanced Gas-cooled Reactor (AGR). Some countries (France, UK, Russia, Japan) built demonstration scale fast neutron reactors in the 1960s and 70s, but the only commercial reactor of this type currently operating is in Russia.

Nuclear reactor generations from the pioneering age to the next decade (reproduced with permission from Ricotti 2013 )

Future evolution

The fourth Generation reactors, offering the potential of much higher energy recovery and reduced volumes of radioactive waste, are under study in the framework of the “Generation IV International Forum” (GIF) 3 and the “International Project on Innovative Nuclear Reactors and Fuel Cycles” (INPRO). The European Commission in 2010 launched the European Sustainable Nuclear Industrial Initiative (ESNII), which will support three Generation IV fast reactor projects as part of the EU’s plan to promote low-carbon energy technologies. Other initiatives supporting biomass, wind, solar, electricity grids and carbon sequestration are in parallel. ESNII will take forward: the Astrid sodium-cooled fast reactor (SFR) proposed by France, the Allegro gas-cooled fast reactor (GFR) supported by central and eastern Europe and the MYRRHA lead- cooled fast reactor (LFR) technology pilot proposed by Belgium.

The generation of nuclear energy from uranium produces not only electricity but also spent fuel and high-level radioactive waste (HLW) as a by-product. For this HLW, a technical and socially acceptable solution is necessary. The time scale needed for the radiotoxicity of the spent fuel to drop to the level of natural uranium is very long (i.e. of the order of 200 000–300 000 years). The preferred solution for disposing of spent fuel or the HLW resulting from classical reprocessing is deep geological storage. Whilst there are no such geological repositories operating yet in the world, Sweden, Finland and France are on track to have such facilities ready by 2025 (Kautsky et al. 2013 ). In this context it should also be mentioned that it is only for a minor fraction of the HLW that recycling and transmutation is required since adequate separation techniques of the fuel can be recycled and again fed through the LWR system.

The “Strategic Energy Technology Plan” (SET-Plan) identifies fission energy as one of the contributors to the 2050 objectives of a low-carbon energy mix, relying on the Generation-3 reactors, closed fuel cycle and the start of implementation of Generation IV reactors making nuclear energy more sustainable. The EU Energy Roadmap 2050 provides decarbonisation scenarios with different assumptions from the nuclear perspective: two scenarios contemplate a nuclear phase-out by 2050, whilst three others consider that 15–20 % of electricity will be produced by nuclear energy. If by 2050 a generation capacity of 20 % nuclear electricity (140 GWe) is to be secured, 100–120 nuclear power units will have to be built between now and 2050, the precise number depending on the power rating (Garbil and Goethem 2013 ).

Despite the regional differences in the development plans, the main questions are of common interest to all countries, and require solutions in order to maintain nuclear power in the power mix of contributing to sustainable economic growth. The questions include (i) maintaining safe operation of the nuclear plants, (ii) securing the fuel supplies, (iii) a strategy for the management of radioactive waste and spent nuclear fuel.

Safety and non-proliferation risks are managed in accordance with the international rules issued both by IAEA and EURATOM in the EU. The nuclear countries have signed the corresponding agreements and the majority of them have created the necessary legal and regulatory structure (Nuclear Safety Authority). As regards radioactive wastes, particularly high-level wastes (HLW) and spent fuel (SF) most of the countries have long-term policies. The establishment of new nuclear units and the associated nuclear technology developments offer new perspectives, which may need reconsideration of fuel cycle policies and more active regional and global co-operation.

Open and closed fuel cycle

In the frame of the open fuel cycle, the spent fuel will be taken to final disposal without recycling. Deep geological repositories are the only available option for isolating the highly radioactive materials for a very long time from the biosphere. Long-term (80–100 years) near soil intermediate storages are realised in e.g. France and the Netherlands which will allow for permanent access and inspection. The main advantage of the open fuel cycle is its simplicity. The spent fuel assemblies are first stored in interim storage for several years or decades, then they will be placed in special containers and moved into deep underground storage facilities. The technology for producing such containers and for excavation of the underground system of tunnels exists today (Hózer et al. 2010 ; Kautsky et al. 2013 ).

The European Academies Science Advisory Board recently released the report on “Management of spent nuclear fuel and its waste” (EASAC 2014 ). The report discusses the challenges associated with different strategies to manage spent nuclear fuel, in respect of both open cycles and steps towards closing the nuclear fuel cycle. It integrates the conclusions on the issues raised on sustainability, safety, non-proliferation and security, economics, public involvement and on the decision-making process. Recently Vandenbosch et al. ( 2015 ) critically discussed the issue of confidence in the indefinite storage of nuclear waste. One complication of the nuclear waste storage problem is that the minor actinides represent a high activity (see Fig.  3 ) and pose non-proliferation issues to be handled safely in a civil used plant. This might be a difficult challenge if the storage is to be operated economically together with the fuel fabrication.

Radiotoxicity of radioactive waste

The open (or ‘once through’) cycle only uses part of the energy stored in the fuel, whilst effectively wasting substantial amounts of energy that could be recovered through recycling. The conventional closed fuel cycle strategy uses the reprocessing of the spent fuel following interim storage. The main components which can be further utilised (U and Pu) are recycled to fuel manufacturing (MOX (Mixed Oxide) fuel fabrication), whilst the smaller volume of residual waste in appropriately conditioned form—e.g. vitrified and encapsulated—is disposed of in deep geological repositories.

The advanced closed fuel cycle strategy is similar to the conventional one, but within this strategy the minor actinides are also removed during reprocessing. The separated isotopes are transmuted in combination with power generation and only the net reprocessing wastes and those conditioned wastes generated during transmutation will be, following appropriate encapsulation, disposed of in deep geological repositories. The main factor that determines the overall storage capacity of a long-term repository is the heat content of nuclear waste, not its volume. During the anticipated repository time, the specific heat generated during the decay of the stored HLW must always stay below a dedicated value prescribed by the storage concept and the geological host information. The waste that results from reprocessing spent fuel from thermal reactors has a lower heat content (after a period of cooling) than does the spent fuel itself. Thus, it can be stored more densely.

A modern light water reactor of 1 GWe capacity will typically discharge about 20–25 tonnes of irradiated fuel per year of operation. About 93–94 % of the mass of typical uranium oxide irradiated fuel comprises uranium (mostly 238 U), with about 4–5 % fission products and ~1 % plutonium. About 0.1–0.2 % of the mass comprises minor actinides (neptunium, americium and curium). These latter elements accumulate in nuclear fuel because of neutron capture, and they contribute significantly to decay heat loading and neutron output, as well as to the overall radiotoxic hazard of spent fuel. Although the total minor actinide mass is relatively small—20 to 25 kg per year from a 1 GWe LWR—it has a disproportionate impact on spent fuel disposal because of its long radioactive decay times (OECD Nuclear Energy Agency 2013 ).

Generation IV development

To address the issue of sustainability of nuclear energy, in particular the use of natural resources, fast neutron reactors (FNRs) must be developed, since they can typically multiply by over a factor 50 the energy production from a given amount of uranium fuel compared to current reactors. FNRs, just as today’s fleet, will be primarily dedicated to the generation of fossil-free base-load electricity. In the FNR the fuel conversion ratio (FCR) is optimised. Through hardening the spectrum a fast reactor can be designed to burn minor actinides giving a FCR larger than unity which allows breeding of fissile materials. FNRs have been operated in the past (especially the Sodium-cooled Fast Reactor in Europe), but today’s safety, operational and competitiveness standards require the design of a new generation of fast reactors. Important research and development is currently being coordinated at the international level through initiatives such as GIF.

In 2002, six reactor technologies were selected which GIF believe represent the future of nuclear energy. These were selected from the many various approaches being studied on the basis of being clean, safe and cost-effective means of meeting increased energy demands on a sustainable basis. Furthermore, they are considered being resistant to diversion of materials for weapons proliferation and secure from terrorist attacks. The continued research and development will focus on the chosen six reactor approaches. Most of the six systems employ a closed fuel cycle to maximise the resource base and minimise high-level wastes to be sent to a repository. Three of the six are fast neutron reactors (FNR) and one can be built as a fast reactor, one is described as epithermal, and only two operate with slow neutrons like today’s plants. Only one is cooled by light water, two are helium-cooled and the others have lead–bismuth, sodium or fluoride salt coolant. The latter three operate at low pressure, with significant safety advantage. The last has the uranium fuel dissolved in the circulating coolant. Temperatures range from 510 to 1000 °C, compared with less than 330 °C for today’s light water reactors, and this means that four of them can be used for thermochemical hydrogen production.

The sizes range from 150 to 1500 MWe, with the lead-cooled one optionally available as a 50–150 MWe “battery” with long core life (15–20 years without refuelling) as replaceable cassette or entire reactor module. This is designed for distributed generation or desalination. At least four of the systems have significant operating experience already in most respects of their design, which provides a good basis for further research and development and is likely to mean that they can be in commercial operation well before 2030. However, when addressing non-proliferation concerns it is significant that fast neutron reactors are not conventional fast breeders, i.e. they do not have a blanket assembly where plutonium-239 is produced. Instead, plutonium production happens to take place in the core, where burn-up is high and the proportion of plutonium isotopes other than Pu-239 remains high. In addition, new reprocessing technologies will enable the fuel to be recycled without separating the plutonium.

In January 2014, a new GIF Technology Roadmap Update was published. 4 It confirmed the choice of the six systems and focused on the most relevant developments of them so as to define the research and development goals for the next decade. It suggested that the Generation IV technologies most likely to be deployed first are the SFR, the lead-cooled fast reactor (LFR) and the very high temperature reactor technologies. The molten salt reactor and the GFR were shown as furthest from demonstration phase.

Europe, through sustainable nuclear energy technology platform (SNETP) and ESNII, has defined its own strategy and priorities for FNRs with the goal to demonstrate Generation IV reactor technologies that can close the nuclear fuel cycle, provide long-term waste management solutions and expand the applications of nuclear fission beyond electricity production to hydrogen production, industrial heat and desalination; The SFR as a proven concept, as well as the LFR as a short-medium term alternative and the GFR as a longer-term alternative technology. The French Commissariat à l’Energie Atomique (CEA) has chosen the development of the SFR technology. Astrid (Advanced Sodium Technological Reactor for Industrial Demonstration) is based on about 45 reactor-years of operational experience in France and will be rated 250 to 600 MWe. It is expected to be built at Marcoule from 2017, with the unit being connected to the grid in 2022.

Other countries like Belgium, Italy, Sweden and Romania are focussing their research and development effort on the LFR whereas Hungary, Czech Republic and Slovakia are investing in the research and development on GFR building upon the work initiated in France on GFR as an alternative technology to SFR. Allegro GFR is to be built in eastern Europe, and is more innovative. It is rated at 100 MWt and would lead to a larger industrial demonstration unit called GoFastR. The Czech Republic, Hungary and Slovakia are making a joint proposal to host the project, with French CEA support. Allegro is expected to begin construction in 2018 operate from 2025. The industrial demonstrator would follow it.

In mid-2013, four nuclear research institutes and engineering companies from central Europe’s Visegrád Group of Nations (V4) agreed to establish a centre for joint research, development and innovation in Generation IV nuclear reactors (the Czech Republic, Hungary, Poland and Slovakia) which is focused on gas-cooled fast reactors such as Allegro.

The MYRRHA (Multi-purpose hYbrid Research Reactor for High-tech Applications) 5 project proposed in Belgium by SCK•CEN could be an Experimental Technological Pilot Plant (ETPP) for the LFR technology. Later, it could become a European fast neutron technology pilot plant for lead and a multi-purpose research reactor. The unit is rated at 100 thermal MW and has started construction at SCK-CEN’s Mol site in 2014 planned to begin operation in 2023. A reduced-power model of Myrrha called Guinevere started up at Mol in March 2010. ESNII also includes an LFR technology demonstrator known as Alfred, also about 100 MWt, seen as a prelude to an industrial demonstration unit of about 600 MWe. Construction on Alfred could begin in 2017 and the unit could start operating in 2025.

Research and development topics to meet the top-level criteria established within the GIF forum in the context of simultaneously matching economics as well as stricter safety criteria set-up by the WENRA FNR demand substantial improvements with respect to the following issues:

• Primary system design simplification,
• Improved materials,
• Innovative heat exchangers and power conversion systems,
• Advanced instrumentation, in-service inspection systems,
• Enhanced safety,

and those for fuel cycle issues pertain to:

• Partitioning and transmutation,
• Innovative fuels (including minor actinide-bearing) and core performance,
• Advanced separation both via aqueous processes supplementing the PUREX process as well as pyroprocessing, which is mandatory for the reprocessing of the high MA-containing fuels,
• Develop a final depository.

Beyond the research and development, the demonstration projects mentioned above are planned in the frame of the SET-Plan ESNII for sustainable fission. In addition, supporting research infrastructures, irradiation facilities, experimental loops and fuel fabrication facilities, will need to be constructed.

Regarding transmutation, the accelerator-driven transmutation systems (ADS) technology must be compared to FNR technology from the point of view of feasibility, transmutation efficiency and cost efficiency. It is the objective of the MYRRHA project to be an experimental demonstrator of ADS technology. From the economical point of view, the ADS industrial solution should be assessed in terms of its contribution to closing the fuel cycle. One point of utmost importance for the ADS is its ability for burning larger amounts of minor actinides (the typical maximum in a critical FNR is about 2 %).

The concept of partitioning and transmutation (P&T) has three main goals: reduce the radiological hazard associated with spent fuel by reducing the inventory of minor actinides, reduce the time interval required to reach the radiotoxicity of natural uranium and reduce the heat load of the HLW packages to be stored in the geological disposal hence reducing the foot print of the geological disposal.

Advanced management of HLW through P&T consists in advanced separation of the minor actinides (americium, curium and neptunium) and some fission products with a long half-life present in the nuclear waste and their transmutation in dedicated burners to reduce the radiological and heat loads on the geological disposal. The time scale needed for the radiotoxicity of the waste to drop to the level of natural uranium will be reduced from a ‘geological’ value (300 000 years) to a value that is comparable to that of human activities (few hundreds of years) (OECD/NEA 2006 ; OECD 2012 ; PATEROS 2008 6 ). Transmutation of the minor actinides is achieved through fission reactions and therefore fast neutrons are preferred in dedicated burners.

At the European level, four building blocks strategy for Partitioning and Transmutation have been identified. Each block poses a serious challenge in terms of research & development to be done in order to reach industrial scale deployment. These blocks are:

• Demonstration of advanced reprocessing of spent nuclear fuel from LWRs, separating Uranium, Plutonium and Minor Actinides;
• Demonstration of the capability to fabricate at semi-industrial level dedicated transmuter fuel heavily loaded in minor actinides;
• Design and construct one or more dedicated transmuters;
• Fabrication of new transmuter fuel together with demonstration of advanced reprocessing of transmuter fuel.

MYRRHA will support this Roadmap by playing the role of an ADS prototype (at reasonable power level) and as a flexible irradiation facility providing fast neutrons for the qualification of materials and fuel for an industrial transmuter. MYRRHA will be not only capable of irradiating samples of such inert matrix fuels but also of housing fuel pins or even a limited number of fuel assemblies heavily loaded with MAs for irradiation and qualification purposes.

Options for nuclear fusion beyond 2050

Nuclear fusion research, on the basis of magnetic confinement, considered in this report, has been actively pursued in Europe from the mid-60s. Fusion research has the goal to achieve a clean and sustainable energy source for many generations to come. In parallel with basic high-temperature plasma research, the fusion technology programme is pursued as well as the economy of a future fusion reactor (Ward et al. 2005 ; Ward 2009 ; Bradshaw et al. 2011 ). The goal-oriented fusion research should be driven with an increased effort to be able to give the long searched answer to the open question, “will fusion energy be able to cover a major part of mankind’s electricity demand?”. ITER, the first fusion reactor to be built in France by the seven collaborating partners (Europe, USA, Russia, Japan, Korea, China, India) is hoped to answer most of the open physics and many of the remaining technology/material questions. ITER is expected to start operation of the first plasma around 2020 and D-T operation 2027.

The European fusion research has been successful through the organisation of EURATOM to which most countries in Europe belong (the fission programme is also included in EURATOM). EUROfusion, the European Consortium for the Development of Fusion Energy, manages European fusion research activities on behalf of EURATOM. The organisation of the research has resulted in a well-focused common fusion research programme. The members of the EUROfusion 7 consortium are 29 national fusion laboratories. EUROfusion funds all fusion research activities in accordance with the “EFDA Fusion electricity. Roadmap to the realisation of fusion energy” (EFDA 2012 , Fusion electricity). The Roadmap outlines the most efficient way to realise fusion electricity. It is the result of an analysis of the European Fusion Programme undertaken by all Research Units within EUROfusion’s predecessor agreement, the European Fusion Development Agreement, EFDA.

The most successful confinement concepts are toroidal ones like tokamaks and helical systems like stellarators (Wagner 2012 , 2013 ). To avoid drift losses, two magnetic field components are necessary for confinement and stability—the toroidal and the poloidal field component. Due to their superposition, the magnetic field winds helically around a system of nested toroids. In both cases, tokamak and stellarator, the toroidal field is produced by external coils; the poloidal field arises from a strong toroidal plasma current in tokamaks. In case of helical systems all necessary fields are produced externally by coils which have to be superconductive when steady-state operation is intended. Europe is constructing the most ambitious stellarator, Wendelstein 7-X in Germany. It is a fully optimised system with promising features. W7-X goes into operation in 2015. 8

Fusion research has now reached plasma parameters needed for a fusion reactor, even if not all parameters are reached simultaneously in a single plasma discharge (see Fig.  4 ). Plotted is the triple product n•τ E• T i composed of the density n, the confinement time τ E and the ion temperature T i . For ignition of a deuterium–tritium plasma, when the internal α-particle heating from the DT-reaction takes over and allows the external heating to be switched off, the triple product has to be about >6 × 10 21  m −3  s keV). The record parameters given as of today are shown together with the fusion experiment of its achievement in Fig.  4 . The achieved parameters and the missing factors to the ultimate goal of a fusion reactor are summarised below:

• Temperature: 40 keV achieved (JT-60U, Japan); the goal is surpassed by a factor of two
• Density n surpassed by factor 5 (C-mod,USA; LHD,Japan)
• Energy confinement time: a factor of 4 is missing (JET, Europe)
• Fusion triple product (see Fig.  4 : a factor of 6 is missing (JET, Europe)
• The first scientific goal is achieved: Q (fusion power/external heating power) ~1 (0,65) (JET, Europe)
• D-T operation without problems (TFTR (USA), JET, small tritium quantities have been used, however)
• Maximal fusion power for short pulse: 16 MW (JET)
• Divertor development (ASDEX, ASDEX-Upgrade, Germany)
• Design for the first experimental reactor complete (ITER, see below)
• The optimisation of stellarators (W7-AS, W7-X, Germany)

Progress in fusion parameters. Derived in 1955, the Lawson criterion specifies the conditions that must be met for fusion to produce a net energy output (1 keV × 12 million K). From this, a fusion “triple product” can be derived, which is defined as the product of the plasma ion density, ion temperature and energy confinement time. This product must be greater than about 6 × 10 21  keV m −3  s for a deuterium–tritium plasma to ignite. Due to the radioactivity associated with tritium, today’s research tokamaks generally operate with deuterium only ( solid dots ). The large tokamaks JET(EU) and TFTR(US), however, have used a deuterium–tritium mix ( open dots ). The rate of increase in tokamak performance has outstripped that of Moore’s law for the miniaturisation of silicon chips (Pitts et al. 2006 ). Many international projects (their names are given by acronyms in the figure) have contributed to the development of fusion plasma parameters and the progress in fusion research which serves as the basis for the ITER design

After 50 years of fusion research there is no evidence for a fundamental obstacle in the basic physics. But still many problems have to be overcome as detailed below:

Critical issues in fusion plasma physics based on magnetic confinement

• confine a plasma magnetically with 1000 m 3 volume,
• maintain the plasma stable at 2–4 bar pressure,
• achieve 15 MA current running in a fluid (in case of tokamaks, avoid instabilities leading to disruptions),
• find methods to maintain the plasma current in steady-state,
• tame plasma turbulence to get the necessary confinement time,
• develop an exhaust system (divertor) to control power and particle exhaust, specifically to remove the α-particle heat deposited into the plasma and to control He as the fusion ash.

Critical issues in fusion plasma technology

• build a system with 200 MKelvin in the plasma core and 4 Kelvin about 2 m away,
• build magnetic system at 6 Tesla (max field 12 Tesla) with 50 GJ energy,
• develop heating systems to heat the plasma to the fusion temperature and current drive systems to maintain steady-state conditions for the tokamak,
• handle neutron-fluxes of 2 MW/m 2 leading to 100 dpa in the surrounding material,
• develop low activation materials,
• develop tritium breeding technologies,
• provide high availability of a complex system using an appropriate remote handling system,
• develop the complete physics and engineering basis for system licensing.

The goals of ITER

The major goals of ITER (see Fig.  5 ) in physics are to confine a D-T plasma with α-particle self-heating dominating all other forms of plasma heating, to produce about ~500 MW of fusion power at a gain Q  = fusion power/external heating power, of about 10, to explore plasma stability in the presence of energetic α-particles, and to demonstrate ash-exhaust and burn control.

Schematic layout of the ITER reactor experiment (from www.iter.org )

In the field of technology, ITER will demonstrate fundamental aspects of fusion as the self-heating of the plasma by alpha-particles, show the essentials to a fusion reactor in an integrated system, give the first test a breeding blanket and assess the technology and its efficiency, breed tritium from lithium utilising the D-T fusion neutron, develop scenarios and materials with low T-inventories. Thus ITER will provide strong indications for vital research and development efforts necessary in the view of a demonstration reactor (DEMO). ITER will be based on conventional steel as structural material. Its inner wall will be covered with beryllium to surround the plasma with low-Z metal with low inventory properties. The divertor will be mostly from tungsten to sustain the high α-particle heat fluxes directed onto target plates situated inside a divertor chamber. An important step in fusion reactor development is the achievement of licensing of the complete system.

The rewards from fusion research and the realisation of a fusion reactor can be described in the following points:

• fusion has a tremendous potential thanks to the availability of deuterium and lithium as primary fuels. But as a recommendation, the fusion development has to be accelerated,

Fusion time strategy towards the fusion reactor on the net (EFDA 2012 , Fusion electricity. A roadmap to the realisation of fusion energy)

In addition, there is the fusion technology programme and its material branch, which ultimately need a neutron source to study the interaction with 14 MeV neutrons. For this purpose, a spallation source IFMIF is presently under design. As a recommendation, ways have to be found to accelerate the fusion development. In general, with ITER, IFMIF and the DEMO, the programme will move away from plasma science more towards technology orientation. After the ITER physics and technology programme—if successful—fusion can be placed into national energy supply strategies. With fusion, future generations can have access to a clean, safe and (at least expected of today) economic power source.

The fission nuclear power continues to be an essential part of the low-carbon electricity generation in the world for decades to come. There are breakthrough possibilities in the development of new generation nuclear reactors where the life-time of the nuclear waste can be reduced to some hundreds of years instead of the present time-scales of hundred thousand of years. Research on the fourth generation reactors is needed for the realisation of this development. For the fast nuclear reactors a substantial research and development effort is required in many fields—from material sciences to safety demonstration—to attain the envisaged goals. Fusion provides a long-term vision for an efficient energy production. The fusion option for a nuclear reactor for efficient production of electricity should be vigorously pursued on the international arena as well as within the European energy roadmap to reach a decision point which allows to critically assess this energy option.

Box 1 Explanations of abbreviations used in this article

Biographies.

is Professor in Energy Research and Director of MTA Center for Energy Research, Budapest, Hungary. His research interests are in the development of new fission reactors, new structural materials, high temperature irradiation resistance, mechanical deformation.

is Professor of Applied Atomic and Molecular Physics at Royal Institute of Technology, (KTH), Stockholm, Sweden. Her research interests are in basic atomic and molecular processes studied with synchrotron radiation, development of diagnostic techniques for analysing the performance of fusion experiments in particular development of photon spectroscopic diagnostics.

1 http://www.iea.org/ .

2 https://cnpp.iaea.org/pages/index.htm .

3 GenIV International forum: ( http://www.gen-4.org/index.html ).

4 https://www.gen-4.org/gif/jcms/c_60729/technology-roadmap-update-2013 .

5 http://myrrha.sckcen.be/ .

6 www.sckcen.be/pateros/ .

7 https://www.euro-fusion.org/ .

8 https://www.ipp.mpg.de/ippcms/de/pr/forschung/w7x/index.html .

Contributor Information

Akos Horvath, Email: [email protected] .

Elisabeth Rachlew, Email: es.htk@kre .

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The 3,122-megawatt Civaux Nuclear Power Plant in France, which opened in 1997. GUILLAUME SOUVANT / AFP / Getty Images

Why Nuclear Power Must Be Part of the Energy Solution

By Richard Rhodes • July 19, 2018

Many environmentalists have opposed nuclear power, citing its dangers and the difficulty of disposing of its radioactive waste. But a Pulitzer Prize-winning author argues that nuclear is safer than most energy sources and is needed if the world hopes to radically decrease its carbon emissions. 

In the late 16th century, when the increasing cost of firewood forced ordinary Londoners to switch reluctantly to coal, Elizabethan preachers railed against a fuel they believed to be, literally, the Devil’s excrement. Coal was black, after all, dirty, found in layers underground — down toward Hell at the center of the earth — and smelled strongly of sulfur when it burned. Switching to coal, in houses that usually lacked chimneys, was difficult enough; the clergy’s outspoken condemnation, while certainly justified environmentally, further complicated and delayed the timely resolution of an urgent problem in energy supply.

For too many environmentalists concerned with global warming, nuclear energy is today’s Devil’s excrement. They condemn it for its production and use of radioactive fuels and for the supposed problem of disposing of its waste. In my judgment, their condemnation of this efficient, low-carbon source of baseload energy is misplaced. Far from being the Devil’s excrement, nuclear power can be, and should be, one major component of our rescue from a hotter, more meteorologically destructive world.

Like all energy sources, nuclear power has advantages and disadvantages. What are nuclear power’s benefits? First and foremost, since it produces energy via nuclear fission rather than chemical burning, it generates baseload electricity with no output of carbon, the villainous element of global warming. Switching from coal to natural gas is a step toward decarbonizing, since burning natural gas produces about half the carbon dioxide of burning coal. But switching from coal to nuclear power is radically decarbonizing, since nuclear power plants release greenhouse gases only from the ancillary use of fossil fuels during their construction, mining, fuel processing, maintenance, and decommissioning — about as much as solar power does, which is about 4 to 5 percent as much as a natural gas-fired power plant.

Nuclear power releases less radiation into the environment than any other major energy source.

Second, nuclear power plants operate at much higher capacity factors than renewable energy sources or fossil fuels. Capacity factor is a measure of what percentage of the time a power plant actually produces energy. It’s a problem for all intermittent energy sources. The sun doesn’t always shine, nor the wind always blow, nor water always fall through the turbines of a dam.

In the United States in 2016, nuclear power plants, which generated almost 20 percent of U.S. electricity, had an average capacity factor of 92.3 percent , meaning they operated at full power on 336 out of 365 days per year. (The other 29 days they were taken off the grid for maintenance.) In contrast , U.S. hydroelectric systems delivered power 38.2 percent of the time (138 days per year), wind turbines 34.5 percent of the time (127 days per year) and solar electricity arrays only 25.1 percent of the time (92 days per year). Even plants powered with coal or natural gas only generate electricity about half the time for reasons such as fuel costs and seasonal and nocturnal variations in demand. Nuclear is a clear winner on reliability.

Third, nuclear power releases less radiation into the environment than any other major energy source. This statement will seem paradoxical to many readers, since it’s not commonly known that non-nuclear energy sources release any radiation into the environment. They do. The worst offender is coal, a mineral of the earth’s crust that contains a substantial volume of the radioactive elements uranium and thorium. Burning coal gasifies its organic materials, concentrating its mineral components into the remaining waste, called fly ash. So much coal is burned in the world and so much fly ash produced that coal is actually the major source of radioactive releases into the environment. 

Anti-nuclear activists protest the construction of a nuclear power station in Seabrook, New Hampshire in 1977.  AP Photo

In the early 1950s, when the U.S. Atomic Energy Commission believed high-grade uranium ores to be in short supply domestically, it considered extracting uranium for nuclear weapons from the abundant U.S. supply of fly ash from coal burning. In 2007, China began exploring such extraction, drawing on a pile of some 5.3 million metric tons of brown-coal fly ash at Xiaolongtang in Yunnan. The Chinese ash averages about 0.4 pounds of triuranium octoxide (U3O8), a uranium compound, per metric ton. Hungary and South Africa are also exploring uranium extraction from coal fly ash. 

What are nuclear’s downsides? In the public’s perception, there are two, both related to radiation: the risk of accidents, and the question of disposal of nuclear waste.

There have been three large-scale accidents involving nuclear power reactors since the onset of commercial nuclear power in the mid-1950s: Three-Mile Island in Pennsylvania, Chernobyl in Ukraine, and Fukushima in Japan.

Studies indicate even the worst possible accident at a nuclear plant is less destructive than other major industrial accidents.

The partial meltdown of the Three-Mile Island reactor in March 1979, while a disaster for the owners of the Pennsylvania plant, released only a minimal quantity of radiation to the surrounding population. According to the U.S. Nuclear Regulatory Commission :

“The approximately 2 million people around TMI-2 during the accident are estimated to have received an average radiation dose of only about 1 millirem above the usual background dose. To put this into context, exposure from a chest X-ray is about 6 millirem and the area’s natural radioactive background dose is about 100-125 millirem per year… In spite of serious damage to the reactor, the actual release had negligible effects on the physical health of individuals or the environment.”

The explosion and subsequent burnout of a large graphite-moderated, water-cooled reactor at Chernobyl in 1986 was easily the worst nuclear accident in history. Twenty-nine disaster relief workers died of acute radiation exposure in the immediate aftermath of the accident. In the subsequent three decades, UNSCEAR — the United Nations Scientific Committee on the Effects of Atomic Radiation, composed of senior scientists from 27 member states — has observed and reported at regular intervals on the health effects of the Chernobyl accident. It has identified no long-term health consequences to populations exposed to Chernobyl fallout except for thyroid cancers in residents of Belarus, Ukraine and western Russia who were children or adolescents at the time of the accident, who drank milk contaminated with 131iodine, and who were not evacuated. By 2008, UNSCEAR had attributed some 6,500 excess cases of thyroid cancer in the Chernobyl region to the accident, with 15 deaths.  The occurrence of these cancers increased dramatically from 1991 to 1995, which researchers attributed mostly to radiation exposure. No increase occurred in adults.

The Diablo Canyon Nuclear Power Plant, located near Avila Beach, California, will be decommissioned starting in 2024. Pacific Gas and Electric

“The average effective doses” of radiation from Chernobyl, UNSCEAR also concluded , “due to both external and internal exposures, received by members of the general public during 1986-2005 [were] about 30 mSv for the evacuees, 1 mSv for the residents of the former Soviet Union, and 0.3 mSv for the populations of the rest of Europe.”  A sievert is a measure of radiation exposure, a millisievert is one-one-thousandth of a sievert. A full-body CT scan delivers about 10-30 mSv. A U.S. resident receives an average background radiation dose, exclusive of radon, of about 1 mSv per year.

The statistics of Chernobyl irradiations cited here are so low that they must seem intentionally minimized to those who followed the extensive media coverage of the accident and its aftermath. Yet they are the peer-reviewed products of extensive investigation by an international scientific agency of the United Nations. They indicate that even the worst possible accident at a nuclear power plant — the complete meltdown and burnup of its radioactive fuel — was yet far less destructive than other major industrial accidents across the past century. To name only two: Bhopal, in India, where at least 3,800 people died immediately and many thousands more were sickened when 40 tons of methyl isocyanate gas leaked from a pesticide plant; and Henan Province, in China, where at least 26,000 people drowned following the failure of a major hydroelectric dam in a typhoon. “Measured as early deaths per electricity units produced by the Chernobyl facility (9 years of operation, total electricity production of 36 GWe-years, 31 early deaths) yields 0.86 death/GWe-year),” concludes Zbigniew Jaworowski, a physician and former UNSCEAR chairman active during the Chernobyl accident. “This rate is lower than the average fatalities from [accidents involving] a majority of other energy sources. For example, the Chernobyl rate is nine times lower than the death rate from liquefied gas… and 47 times lower than from hydroelectric stations.” 

Nuclear waste disposal, although a continuing political problem, is not any longer a technological problem.

The accident in Japan at Fukushima Daiichi in March 2011 followed a major earthquake and tsunami. The tsunami flooded out the power supply and cooling systems of three power reactors, causing them to melt down and explode, breaching their confinement. Although 154,000 Japanese citizens were evacuated from a 12-mile exclusion zone around the power station, radiation exposure beyond the station grounds was limited. According to the report submitted to the International Atomic Energy Agency in June 2011:

“No harmful health effects were found in 195,345 residents living in the vicinity of the plant who were screened by the end of May 2011. All the 1,080 children tested for thyroid gland exposure showed results within safe limits. By December, government health checks of some 1,700 residents who were evacuated from three municipalities showed that two-thirds received an external radiation dose within the normal international limit of 1 mSv/year, 98 percent were below 5 mSv/year, and 10 people were exposed to more than 10 mSv… [There] was no major public exposure, let alone deaths from radiation.” 

Nuclear waste disposal, although a continuing political problem in the U.S., is not any longer a technological problem. Most U.S. spent fuel, more than 90 percent of which could be recycled to extend nuclear power production by hundreds of years, is stored at present safely in impenetrable concrete-and-steel dry casks on the grounds of operating reactors, its radiation slowly declining. 

An activist in March 2017 demanding closure of the Fessenheim Nuclear Power Plant in France. Authorities announced in April that they will close the facility by 2020. SEBASTIEN BOZON / AFP / Getty Images

The U.S. Waste Isolation Pilot Plant (WIPP) near Carlsbad, New Mexico currently stores low-level and transuranic military waste and could store commercial nuclear waste in a 2-kilometer thick bed of crystalline salt, the remains of an ancient sea. The salt formation extends from southern New Mexico all the way northeast to southwestern Kansas. It could easily accommodate the entire world’s nuclear waste for the next thousand years.

Finland is even further advanced in carving out a permanent repository in granite bedrock 400 meters under Olkiluoto, an island in the Baltic Sea off the nation’s west coast. It expects to begin permanent waste storage in 2023.

A final complaint against nuclear power is that it costs too much. Whether or not nuclear power costs too much will ultimately be a matter for markets to decide, but there is no question that a full accounting of the external costs of different energy systems would find nuclear cheaper than coal or natural gas. 

Nuclear power is not the only answer to the world-scale threat of global warming. Renewables have their place; so, at least for leveling the flow of electricity when renewables vary, does natural gas. But nuclear deserves better than the anti-nuclear prejudices and fears that have plagued it. It isn’t the 21st century’s version of the Devil’s excrement. It’s a valuable, even an irreplaceable, part of the solution to the greatest energy threat in the history of humankind.

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Nuclear Power: Technical and Institutional Options for the Future (1992)

Chapter: 5 conclusions and recommendations, conclusions and recommendations.

The Committee was requested to analyze the technological and institutional alternatives to retain an option for future U.S. nuclear power deployment.

A premise of the Senate report directing this study is “that nuclear fission remains an important option for meeting our electric energy requirements and maintaining a balanced national energy policy.” The Committee was not asked to examine this premise, and it did not do so. The Committee consisted of members with widely ranging views on the desirability of nuclear power. Nevertheless, all members approached the Committee's charge from the perspective of what would be necessary if we are to retain nuclear power as an option for meeting U.S. electric energy requirements, without attempting to achieve consensus on whether or not it should be retained. The Committee's conclusions and recommendations should be read in this context.

The Committee's review and analyses have been presented in previous chapters. Here the Committee consolidates the conclusions and recommendations found in the previous chapters and adds some additional conclusions and recommendations based upon some of the previous statements. The Committee also includes some conclusions and recommendations that are not explicitly based upon the earlier chapters but stem from the considerable experience of the Committee members.

Most of the following discussion contains conclusions. There also are a few recommendations. Where the recommendations appear they are identified as such by bold italicized type.

GENERAL CONCLUSIONS

In 1989, nuclear plants produced about 19 percent of the United States ' electricity, 77 percent of France's electricity, 26 percent of Japan's electricity, and 33 percent of West Germany's electricity. However, expansion of commercial nuclear energy has virtually halted in the United States. In other countries, too, growth of nuclear generation has slowed or stopped. The reasons in the United States include reduced growth in demand for electricity, high costs, regulatory uncertainty, and public opinion. In the United States, concern for safety, the economics of nuclear power, and waste disposal issues adversely affect the general acceptance of nuclear power.

Electricity Demand

Estimated growth in summer peak demand for electricity in the United States has fallen from the 1974 projection of more than 7 percent per year to a relatively steady level of about 2 percent per year. Plant orders based on the projections resulted in cancellations, extended construction schedules, and excess capacity during much of the 1970s and 1980s. The excess capacity has diminished in the past five years, and ten year projections (at approximately 2 percent per year) suggest a need for new capacity in the 1990s and beyond. To meet near-term anticipated demand, bidding by non-utility generators and energy efficiency providers is establishing a trend for utilities acquiring a substantial portion of this new generating capacity from others. Reliance on non-utility generators does not now favor large scale baseload technologies.

Nuclear power plants emit neither precursors to acid rain nor gases that contribute to global warming, like carbon dioxide. Both of these environmental issues are currently of great concern. New regulations to address these issues will lead to increases in the costs of electricity produced by combustion of coal, one of nuclear power's main competitors. Increased costs for coal-generated electricity will also benefit alternate energy sources that do not emit these pollutants.

Major deterrents for new U.S. nuclear plant orders include high capital carrying charges, driven by high construction costs and extended construction times, as well as the risk of not recovering all construction costs.

Construction Costs

Construction costs are hard to establish, with no central source, and inconsistent data from several sources. Available data show a wide range of costs for U.S. nuclear plants, with the most expensive costing three times more (in dollars per kilowatt electric) than the least expensive in the same year of commercial operation. In the post-Three Mile Island era, the cost increases have been much larger. Considerable design modification and retrofitting to meet new regulations contributed to cost increases. From 1971 to 1980, the most expensive nuclear plant (in constant dollars) increased by 30 percent. The highest cost for a nuclear plant beginning commercial operation in the United States was twice as expensive (in constant dollars) from 1981 to 1984 as it was from 1977 to 1980.

Construction Time

Although plant size also increased, the average time to construct a U.S. nuclear plant went from about 5 years prior to 1975 to about 12 years from 1985 to 1989. U.S. construction times are much longer than those in other major nuclear countries, except for the United Kingdom. Over the period 1978 to 1989, the U.S. average construction time was nearly twice that of France and more than twice that of Japan.

Billions of dollars in disallowances of recovery of costs from utility ratepayers have made utilities and the financial community leery of further investments in nuclear power plants. During the 1980s, rate base disallowances by state regulators totaled about $14 billion for nuclear plants, but only about $0.7 billion for non-nuclear plants.

Operation and maintenance (O&M) costs for U.S. nuclear plants have increased faster than for coal plants. Over the decade of the 1980s, U.S. nuclear O&M-plus-fuel costs grew from nearly half to about the same as those for fossil fueled plants, a significant shift in relative advantage.

Performance

On average, U.S. nuclear plants have poorer capacity factors compared to those of plants in other Organization for Economic Cooperation and Development (OECD) countries. On a lifetime basis, the United States is barely above 60 percent capacity factor, while France and Japan are at 68 percent, and West Germany is at 74 percent. Moreover, through 1988 12 U.S. plants were in the bottom 22. However, some U.S. plants do very well: 3 of the top 22 OECD plants through 1988 were U.S. U.S. plants averaged 65 percent in 1988, 63 percent in 1989, and 68 percent in 1990.

Except for capacity factors, the performance indicators of U.S. nuclear plants have improved significantly over the past several years. If the industry is to achieve parity with the operating performance in other countries, it must carefully examine its failure to achieve its own goal in this area and develop improved strategies, including better management practices. Such practices are important if the generators are to develop confidence that the new generation of plants can achieve the higher load factors estimated by the vendors.

Public Attitudes

There has been substantial opposition to new plants. The failure to solve the high-level radioactive waste disposal problem has harmed nuclear power's public image. It is the Committee's opinion, based upon our experience, that, more recently, an inability of states, that are members of regional compact commissions, to site low-level radioactive waste facilities has also harmed nuclear power's public image.

Several factors seem to influence the public to have a less than positive attitude toward new nuclear plants:

no perceived urgency for new capacity;

nuclear power is believed to be more costly than alternatives;

concerns that nuclear power is not safe enough;

little trust in government or industry advocates of nuclear power;

concerns about the health effects of low-level radiation;

concerns that there is no safe way to dispose of high-level waste; and

concerns about proliferation of nuclear weapons.

The Committee concludes that the following would improve public opinion of nuclear power:

a recognized need for a greater electrical supply that can best be met by large plants;

economic sanctions or public policies imposed to reduce fossil fuel burning;

maintaining the safe operation of existing nuclear plants and informing the public;

providing the opportunity for meaningful public participation in nuclear power issues, including generation planning, siting, and oversight;

better communication on the risk of low-level radiation;

resolving the high-level waste disposal issue; and

assurance that a revival of nuclear power would not increase proliferation of nuclear weapons.

As a result of operating experience, improved O&M training programs, safety research, better inspections, and productive use of probabilistic risk analysis, safety is continually improved. The Committee concludes that the risk to the health of the public from the operation of current reactors in the United States is very small. In this fundamental sense, current reactors are safe. However, a significant segment of the public has a different perception and also believes that the level of safety can and should be increased. The

development of advanced reactors is in part an attempt to respond to this public attitude.

Institutional Changes

The Committee believes that large-scale deployment of new nuclear power plants will require significant changes by both industry and government.

One of the most important factors affecting the future of nuclear power in the United States is its cost in relation to alternatives and the recovery of these capital and operating charges through rates that are charged for the electricity produced. Chapter 2 of this report deals with these issues in some detail. As stated there, the industry must develop better methods for managing the design and construction of nuclear plants. Arrangements among the participants that would assure timely, economical, and high-quality construction of new nuclear plants, the Committee believes, will be prerequisites to an adequate degree of assurance of capital cost recovery from state regulatory authorities in advance of construction. The development of state prudency laws also can provide a positive response to this issue.

The Committee and others are well aware of the increases in nuclear plant construction and operating costs over the last 20 years and the extension of plant construction schedules over this same period. 1 The Committee believes there are many reasons for these increases but is unable to disaggregate the cost effect among these reasons with any meaningful precision.

Like others, the Committee believes that the financial community and the generators must both be satisfied that significant improvements can be achieved before new plants can be ordered. In addition, the Committee believes that greater confidence in the control of costs can be realized with plant designs that are more nearly complete before construction begins, plants that are easier to construct, use of better construction and management methods, and business arrangements among the participants that provide stronger incentives for cost-effective, timely completion of projects.

It is the Committee's opinion, based upon our experience, that the principal participants in the nuclear industry--utilities, architect-engineers, and suppliers –should begin now to work out the full range of contractual arrangements for advanced nuclear power plants. Such arrangements would

increase the confidence of state regulatory bodies and others that the principal participants in advanced nuclear power plant projects will be financially accountable for the quality, timeliness, and economy of their products and services.

Inadequate management practices have been identified at some U.S. utilities, large and small public and private. Because of the high visibility of nuclear power and the responsibility for public safety, a consistently higher level of demonstrated utility management practices is essential before the U.S. public's attitude about nuclear power is likely to improve.

Over the past decade, utilities have steadily strengthened their ability to be responsible for the safety of their plants. Their actions include the formation and support of industry institutions, including the Institute of Nuclear Power Operations (INPO). Self-assessment and peer oversight through INPO are acknowledged to be strong and effective means of improving the performance of U.S. nuclear power plants. The Committee believes that such industry self-improvement, accountability, and self-regulation efforts improve the ability to retain nuclear power as an option for meeting U.S. electric energy requirements. The Committee encourages industry efforts to reduce reliance on the adversarial approach to issue resolution.

It is the Committee's opinion, based upon our experience, that the nuclear industry should continue to take the initiative to bring the standards of every American nuclear plant up to those of the best plants in the United States and the world. Chronic poor performers should be identified publicly and should face the threat of insurance cancellations. Every U.S. nuclear utility should continue its full-fledged participation in INPO; any new operators should be required to become members through insurance prerequisites or other institutional mechanisms.

Standardization. The Committee views a high degree of standardization as very important for the retention of nuclear power as an option for meeting U.S. electric energy requirements. There is not a uniformly accepted definition of standardization. The industry, under the auspices of the Nuclear Power Oversight Committee, has developed a position paper on standardization that provides definitions of the various phases of standardization and expresses an industry commitment to standardization. The Committee believes that a strong and sustained commitment by the principal participants will be required to realize the potential benefits of standardization (of families of plants) in the diverse U.S. economy. It is the Committee's opinion, based upon our experience, that the following will be necessary:

Families of standardized plants will be important for ensuring the highest levels of safety and for realizing the potential economic benefits of new nuclear plants. Families of standardized plants will allow standardized approaches to plant modification, maintenance, operation, and training.

Customers, whether utilities or other entities, must insist on standardization before an order is placed, during construction, and throughout the life of the plant.

Suppliers must take standardization into account early in planning and marketing. Any supplier of standardized units will need the experience and resources for a long-term commitment.

Antitrust considerations will have to be properly taken into account to develop standardized plants.

Nuclear Regulatory Commission

An obstacle to continued nuclear power development has been the uncertainties in the Nuclear Regulatory Commission's (NRC) licensing process. Because the current regulatory framework was mainly intended for light water reactors (LWR) with active safety systems and because regulatory standards were developed piecemeal over many years, without review and consolidation, the regulations should be critically reviewed and modified (or replaced with a more coherent body of regulations) for advanced reactors of other types. The Committee recommends that NRC comprehensively review its regulations to prepare for advance reactors, in particular. LWRs with passive safety features. The review should proceed from first principles to develop a coherent, consistent set of regulations.

The Committee concludes that NRC should improve the quality of its regulation of existing and future nuclear power plants, including tighter management controls over all of its interactions with licensees and consistency of regional activities. Industry has proposed such to NRC.

The Committee encourages efforts by NRC to reduce reliance on the adversarial approach to issue resolution. The Committee recommends that NRC encourage industry self-improvement, accountability, and self-regulation initia tives . While federal regulation plays an important safety role, it must not be allowed to detract from or undermine the accountability of utilities and their line management organizations for the safety of their plants.

It is the Committee's expectation that economic incentive programs instituted by state regulatory bodies will continue for nuclear power plant operators. Properly formulated and administered, these programs should improve the economic performance of nuclear plants, and they may also enhance safety. However, they do have the potential to provide incentives counter to safety. The Committee believes that such programs should focus

on economic incentives and avoid incentives that can directly affect plant safety. On July 18, 1991 NRC issued a Nuclear Regulatory Commission Policy Statement which expressed concern that such incentive programs may adversely affect safety and commits NRC to monitoring such programs. A joint industry/state study of economic incentive programs could help assure that such programs do not interfere with the safe operation of nuclear power plants.

It is the Committee's opinion, based upon our experience, that NRC should continue to exercise its federally mandated preemptive authority over the regulation of commercial nuclear power plant safety if the activities of state government agencies (or other public or private agencies) run counter to nuclear safety. Such activities would include those that individually or in the aggregate interfere with the ability of the organization with direct responsibility for nuclear plant safety (the organization licensed by the Commission to operate the plant) to meet this responsibility. The Committee urges close industry-state cooperation in the safety area.

It is also the Committee's opinion, based upon our experience, that the industry must have confidence in the stability of NRC's licensing process. Suppliers and utilities need assurance that licensing has become and will remain a manageable process that appropriately limits the late introduction of new issues.

It is likely that, if the possibility of a second hearing before a nuclear plant can be authorized to operate is to be reduced or eliminated, legislation will be necessary. The nuclear industry is convinced that such legislation will be required to increase utility and investor confidence to retain nuclear power as an option for meeting U.S. electric energy requirements. The Committee concurs.

It is the Committee's opinion, based upon our experience, that potential nuclear power plant sponsors must not face large unanticipated cost increases as a result of mid-course regulatory changes, such as backfits. NRC 's new licensing rule, 10 CFR Part 52, provides needed incentives for standardized designs.

Industry and the Nuclear Regulatory Commission

The U.S. system of nuclear regulation is inherently adversarial, but mitigation of unnecessary tension in the relations between NRC and its nuclear power licensees would, in the Committee's opinion, improve the regulatory environment and enhance public health and safety. Thus, the Committee commends the efforts by both NRC and the industry to work

more cooperatively together and encourages both to continue and strengthen these efforts.

Department of Energy

Lack of resolution of the high-level waste problem jeopardizes future nuclear power development. The Committee believes that the legal status of the Yucca Mountain site for a geologic repository should be resolved soon, and that the Department of Energy's (DOE) program to investigate this site should be continued. In addition, a contingency plan must be developed to store high-level radioactive waste in surface storage facilities pending the availability of the geologic repository.

Environmental Protection Agency

The problems associated with establishing a high-level waste site at Yucca Mountain are exacerbated by the requirement that, before operation of a repository begins, DOE must demonstrate to NRC that the repository will perform to standards established by the Environmental Protection Agency (EPA). NRC's staff has strongly questioned the workability of these quantitative requirements, as have the National Research Council's Radioactive Waste Management Board and others. The Committee concludes that the EPA standard for disposal of high-level waste will have to be reevaluated to ensure that a standard that is both adequate and feasible is applied to the geologic waste repository.

Administration and Congress

The Price-Anderson Act will expire in 2002. The Committee sought to discover whether or not such protection would be required for advanced reactors. The clear impression the Committee received from industry representatives was that some such protection would continue to be needed, although some Committee members believe that this was an expression of desire rather than of need. At the very least, renewal of Price-Anderson in 2002 would be viewed by the industry as a supportive action by Congress and would eliminate the potential disruptive effect of developing alternative liability arrangements with the insurance industry. Failure to renew Price-Anderson in 2002 would raise a new impediment to nuclear power plant orders as well as possibly reduce an assured source of funds to accident victims.

The Committee believes that the National Transportation Safety Board (NTSB) approach to safety investigations, as a substitute for the present NRC approach, has merit. In view of the infrequent nature of the activities of such a committee, it may be feasible for it to be established on an ad hoc basis and report directly to the NRC chairman. Therefore, the Committee recommends that such a small safety review entity be established. Before the establishment of such an activity, its charter should be carefully defined, along with a clear delineation of the classes of accidents it would investigate. Its location in the government and its reporting channels should also be specified. The function of this group would parallel those of NTSB. Specifically, the group would conduct independent public investigations of serious incidents and accidents at nuclear power plants and would publish reports evaluating the causes of these events. This group would have only a small administrative structure and would bring in independent experts, including those from both industry and government, to conduct its investigations.

It is the Committee's opinion, based upon our experience, that responsible arrangements must be negotiated between sponsors and economic regulators to provide reasonable assurances of complete cost recovery for nuclear power plant sponsors. Without such assurances, private investment capital is not likely to flow to this technology.

In Chapter 2 , the Committee addressed the non-recovery of utility costs in rate proceedings and concluded that better methods of dealing with this issue must be established. The Committee was impressed with proposals for periodic reviews of construction progress and costs--“rolling prudency” determinations--as one method for managing the risks of cost recovery. The Committee believes that enactment of such legislation could remove much of the investor risk and uncertainty currently associated with state regulatory treatment of new power plant construction, and could therefore help retain nuclear power as an option for meeting U.S. electric energy requirements.

On balance, however, unless many states adopt this or similar legislation, it is the Committee's view that substantial assurances probably cannot be given, especially in advance of plant construction, that all costs incurred in building nuclear plants will be allowed into rate bases.

The Committee notes the current trend toward economic deregulation of electric power generation. It is presently unclear whether this trend is compatible with substantial additions of large-scale, utility-owned, baseload generating capacity, and with nuclear power plants in particular.

It is the Committee's opinion, based upon our experience, that regional low-level radioactive waste compact commissions must continue to establish disposal sites.

The institutional challenges are clearly substantial. If they are to be met, the Committee believes that the Federal government must decide, as a matter of national policy, whether a strong and growing nuclear power program is vital to the economic, environmental, and strategic interests of the American people. Only with such a clearly stated policy, enunciated by the President and backed by the Congress through appropriate statutory changes and appropriations, will it be possible to effect the institutional changes necessary to return the flow of capital and human resources required to properly employ this technology.

Alternative Reactor Technologies

Advanced reactors are now in design or development. They are being designed to be simpler, and, if design goals are realized, these plants will be safer than existing reactors. The design requirements for the advanced reactors are more stringent than the NRC safety goal policy. If final safety designs of advanced reactors, and especially those with passive safety features, are as indicated to this Committee, an attractive feature of them should be the significant reduction in system complexity and corresponding improvement in operability. While difficult to quantify, the benefit of improvements in the operator 's ability to monitor the plant and respond to system degradations may well equal or exceed that of other proposed safety improvements.

The reactor concepts assessed by the Committee were the large evolutionary LWRs, the mid-sized LWRs with passive safety features, 2 the Canadian deuterium uranium (CANDU) heavy water reactor, the modular high-temperature gas-cooled reactor (MHTGR), the safe integral reactor (SIR), the process inherent ultimate safety (PIUS) reactor, and the liquid metal reactor (LMR). The Committee developed the following criteria for comparing these reactor concepts:

safety in operation;

economy of construction and operation;

suitability for future deployment in the U.S. market;

fuel cycle and environmental considerations;

safeguards for resistance to diversion and sabotage;

technology risk and development schedule; and

amenability to efficient and predictable licensing.

With regard to advanced designs, the Committee reached the following conclusions.

Large Evolutionary Light Water Reactors

The large evolutionary LWRs offer the most mature technology. The first standardized design to be certified in the United States is likely to be an evolutionary LWR. The Committee sees no need for federal research and development (R&D) funding for these concepts, although federal funding could accelerate the certification process.

Mid-sized Light Water Reactors with Passive Safety Features

The mid-sized LWRs with passive safety features are designed to be simpler, with modular construction to reduce construction times and costs, and to improve operations. They are likely the next to be certified.

Because there is no experience in building such plants, cost projections for the first plant are clearly uncertain. To reduce the economic uncertainties it will be necessary to demonstrate the construction technology and improved operating performance. These reactors differ from current reactors in construction approach, plant configuration, and safety features. These differences do not appear so great as to require that a first plant be built for NRC certification. While a prototype in the traditional sense will not be required, the Committee concludes that no first-plant mid-sized LWR with passive safety features is likely to be certified and built without government incentives, in the form of shared funding or financial guarantees.

CANDU Heavy Water Reactor

The Committee judges that the CANDU ranks below the advanced mid-sized LWRs in market potential. The CANDU-3 reactor is farther along in design than the mid-sized LWRs with passive safety features. However, it has not entered NRC's design certification process. Commission requirements are complex and different from those in Canada so that U.S. certification

could be a lengthy process. However, the CANDU reactor can probably be licensed in this century.

The heavy water reactor is a mature design, and Canadian entry into the U.S. marketplace would give added insurance of adequate nuclear capacity if it is needed in the future. But the CANDU does not offer advantages sufficient to justify U.S. government assistance to initiate and conduct its licensing review.

Modular High-Temperature Gas-Cooled Reactor

The MHTGR posed a difficult set of questions for the Committee. U.S. and foreign experience with commercial gas-cooled reactors has not been good. A consortium of industry and utility people continue to promote federal funding and to express interest in the concept, while none has committed to an order.

The reactor, as presently configured, is located below ground level and does not have a conventional containment. The basic rationale of the designers is that a containment is not needed because of the safety features inherent in the properties of the fuel.

However, the Committee was not convinced by the presentations that the core damage frequency for the MHTGR has been demonstrated to be low enough to make a containment structure unnecessary. The Oak Ridge National Laboratory estimates that data to confirm fuel performance will not be available before 1994. The Committee believes that reliance on the defense-in-depth concept must be retained, and accurate evaluation of safety will require evaluation of a detailed design.

A demonstration plant for the MHTGR could be licensed slightly after the turn of the century, with certification following demonstration of successful operation. The MHTGR needs an extensive R&D program to achieve commercial readiness in the early part of the next century. The construction and operation of a first plant would likely be required before design certification. Recognizing the opposite conclusion of the MHTGR proponents, the Committee was not convinced that a foreseeable commercial market exists for MHTGR-produced process heat, which is the unique strategic capability of the MHTGR. Based on the Committee 's view on containment requirements, and the economics and technology issues, the Committee judged the market potential for the MHTGR to be low.

The Committee believes that no funds should be allocated for development of high-temperature gas-cooled reactor technology within the commercial nuclear power development budget of DOE.

Safe Integral Reactor and Process Inherent Ultimate Safety Reactor

The other advanced light water designs the Committee examined were the United Kingdom and U.S. SIR and the Swedish PIUS reactor.

The Committee believes there is no near-term U.S. market for SIR and PIUS. The development risks for SIR and PIUS are greater than for the other LWRs and CANDU-3. The lack of operational and regulatory experience for these two is expected to significantly delay their acceptance by utilities. SIR and PIUS need much R&D, and a first plant will probably be required before design certification is approved.

The Committee concluded that no Federal funds should be allocated for R&D on SIR or PIUS.

Liquid Metal Reactor

LMRs offer advantages because of their potential ability to provide a long-term energy supply through a nearly complete use of uranium resources. Were the nuclear option to be chosen, and large scale deployment follow, at some point uranium supplies at competitive prices might be exhausted. Breeder reactors offer the possibility of extending fissionable fuel supplies well past the next century. In addition, actinides, including those from LWR spent fuel, can undergo fission without significantly affecting performance of an advanced LMR, transmuting the actinides to fission products, most of which, except for technetium, carbon, and some others of little import, have half-lives very much shorter than the actinides. (Actinides are among the materials of greatest concern in nuclear waste disposal beyond about 300 years.) However, substantial further research is required to establish (1) the technical and the economic feasibility of recycling in LMRs actinides recovered from LWR spent fuel, and (2) whether high-recovery recycling of transuranics and their transmutation can, in fact, benefit waste disposal. Assuming success, it would still be necessary to dispose of high-level waste, although the waste would largely consist of significantly shorter-lived fission products. Special attention will be necessary to ensure that the LMR's reprocessing facilities are not vulnerable to sabotage or to theft of plutonium.

The unique property of the LMR, fuel breeding, might lead to a U.S. market, but only in the long term. From the viewpoint of commercial licensing, it is far behind the evolutionary and mid-sized LWRs with passive safety features in having a commercial design available for review. A federally funded program, including one or more first plants, will be required before any LMR concept would be accepted by U.S. utilities.

Net Assessment

The Committee could not make any meaningful quantitative comparison of the relative safety of the various advanced reactor designs. The Committee believes that each of the concepts considered can be designed and operated to meet or closely approach the safety objectives currently proposed for future, advanced LWRs. The different advanced reactor designs employ different mixes of active and passive safety features. The Committee believes that there currently is no single optimal approach to improved safety. Dependence on passive safety features does not, of itself, ensure greater safety. The Committee believes that a prudent design course retains the historical defense-in-depth approach.

The economic projections are highly uncertain, first, because past experience suggests higher costs, longer construction times, and lower availabilities than projected and, second, because of different assumptions and levels of maturity among the designs. The Electric Power Research Institute (EPRI) data, which the Committee believes to be more reliable than that of the vendors, indicate that the large evolutionary LWRs are likely to be the least costly to build and operate on a cost per kilowatt electric or kilowatt hour basis, while the high-temperature gas-cooled reactors and LMRs are likely to be the most expensive. EPRI puts the mid-sized LWRs with passive safety features between the two extremes.

Although there are definite differences in the fuel cycle characteristics of the advanced reactors, fuel cycle considerations did not offer much in the way of discrimination among reactors, nor did safeguards and security considerations, particularly for deployment in the United States. However, the CANDU (with on-line refueling and heavy water) and the LMR (with reprocessing) will require special attention to safeguards.

SIR, MHTGR, PIUS, and LMR are not likely to be deployed for commercial use in the United States, at least within the next 20 years. The development required for commercialization of any of these concepts is substantial.

It is the Committee's overall assessment that the large evolutionary LWRs and the mid-sized LWRs with passive safety features rank highest relative to the Committee 's evaluation criteria. The evolutionary reactors could be ready for deployment by 2000, and the mid-sized could be ready for initial plant construction soon after 2000. The Committee's evaluations and overall assessment are summarized in Figure 5-1 .

FIGURE 5.1 Assessment of advanced reactor technologies.

This table is an attempt to summarize the Committee's qualitative rankings of selected reactor types against each other , without reference either to an absolute standard or to the performance of any other energy resource options, This evaluation was based on the Committee's professional judgment.

The Committee has concluded the following:

Safety and cost are the most important characteristics for future nuclear power plants.

LWRs of the large evolutionary and the mid-sized advanced designs offer the best potential for competitive costs (in that order).

Safety benefits among all reactor types appear to be about equal at this stage in the design process. Safety must be achieved by attention to all failure modes and levels of design by a multiplicity of safety barriers and features. Consequently, in the absence of detailed engineering design and because of the lack of construction and operating experience with the actual concepts, vendor claims of safety superiority among conceptual designs cannot be substantiated.

LWRs can be deployed to meet electricity production needs for the first quarter of the next century:

The evolutionary LWRs are further developed and, because of international projects, are most complete in design. They are likely to be the first plants certified by NRC. They are expected to be the first of the advanced reactors available for commercial use and could operate in the 2000 to 2005 time frame. Compared to current reactors, significant improvements in safety appear likely. Compared to recently completed high-cost reactors, significant improvements also appear possible in cost if institutional barriers are resolved. While little or no federal funding is deemed necessary to complete the process, such funding could accelerate the process.

Because of the large size and capital investment of evolutionary reactors, utilities that might order nuclear plants may be reluctant to do so. If nuclear power plants are to be available to a broader range of potential U.S. generators, the development of the mid-sized plants with passive safety features is important. These reactors are progressing in their designs, through DOE and industry funding, toward certification in the 1995 to 2000 time frame. The Committee believes such funding will be necessary to complete the process. While a prototype in the traditional sense will not be required, federal funding will likely be required for the first mid-sized LWR with passive safety features to be ordered.

Government incentives, in the form of shared funding or financial guarantees, would likely accelerate the next order for a light water plant. The Committee has not addressed what type of government assistance should be provided nor whether the first advanced light water plant should be a large evolutionary LWR or a mid-sized passive LWR.

The CANDU-3 reactor is relatively advanced in design but represents technology that has not been licensed in the United States. The Committee did not find compelling reasons for federal funding to the vendor to support the licensing.

SIR and PIUS, while offering potentially attractive safety features, are unlikely to be ready for commercial use until after 2010. This alone may limit their market potential. Funding priority for research on these reactor systems is considered by the Committee to be low.

MHTGRs also offer potential safety features and possible process heat applications that could be attractive in the market place. However, based on the extensive experience base with light water technology in the United States, the lack of success with commercial use of gas technology, the likely higher costs of this technology compared with the alternatives, and the substantial development costs that are still required before certification, 3 the Committee concluded that the MHTGR had a low market potential. The Committee considered the possibility that the MHTGR might be selected as the new tritium production reactor for defense purposes and noted the vendor association's estimated reduction in development costs for a commercial version of the MHTGR. However, the Committee concluded, for the reasons summarized above, that the commercial MHTGR should be given low priority for federal funding.

LMR technology also provides enhanced safety features, but its uniqueness lies in the potential for extending fuel resources through breeding. While the market potential is low in the near term (before the second quarter of the next century), it could be an important long-term technology, especially if it can be demonstrated to be economic. The Committee believes that the LMR should have the highest priority for long-term nuclear technology development.

The problems of proliferation and physical security posed by the various technologies are different and require continued attention. Special attention will need to be paid to the LMR.

Alternative Research and Development Programs

The Committee developed three alternative R&D programs, each of which contains three common research elements: (1) reactor research using federal facilities. The experimental breeder reactor-II, hot fuel examination facility/south, and fuel manufacturing facility are retained for the LMR; (2) university research programs; and (3) improved performance and life extension programs for existing U.S. nuclear power plants.

The Committee concluded that federal support for development of a commercial version of the MHTGR should be a low priority. However, the fundamental design strategy of the MHTGR is based upon the integrity of the fuel (=1600°C) under operation and accident conditions. There are other potentially significant uses for such fuel, in particular, space propulsion. Consequently, the Committee believes that DOE should consider maintaining a coated fuel particle research program within that part of DOE focused on space reactors.

Alternative 1 adds funding to assist development of the mid-sized LWRs with passive safety features. Alternative 2 adds a LMR development program and associated facilities--the transient reactor test facility, the zero power physics reactor, the Energy Technology Engineering Center, and either the hot fuel examination facility/north in Idaho or the Hanford hot fuel examination facility. This alternative would also include limited research to examine the feasibility of recycling actinides from LWR spent fuel, utilizing the LMR. Finally, Alternative 3 adds the fast flux test facility and increases LMR funding to accelerate reactor and integral fast reactor fuel cycle development and examination of actinide recycle of LWR spent fuel.

None of the three alternatives contain funding for development of the MHTGR, SIR, PIUS, or CANDU-3.

Significant analysis and research is required to assess both the technical and economic feasibility of recycling actinides from LWR spent fuel. The Committee notes that a study of separations technology and transmutation systems was initiated in 1991 by DOE through the National Research Council's Board on Radioactive Waste Management.

It is the Committee's judgment that Alternative 2 should be followed because it:

provides adequate support for the most promising near-term reactor technologies;

provides sufficient support for LMR development to maintain the technical capabilities of the LMR R&D community;

would support deployment of LMRs to breed fuel by the second quarter of the next century should that be needed; and

would maintain a research program in support of both existing and advanced reactors.

The construction of nuclear power plants in the United States is stopping, as regulators, reactor manufacturers, and operators sort out a host of technical and institutional problems.

This volume summarizes the status of nuclear power, analyzes the obstacles to resumption of construction of nuclear plants, and describes and evaluates the technological alternatives for safer, more economical reactors. Topics covered include:

• Institutional issues—including regulatory practices at the federal and state levels, the growing trends toward greater competition in the generation of electricity, and nuclear and nonnuclear generation options.
• Critical evaluation of advanced reactors—covering attributes such as cost, construction time, safety, development status, and fuel cycles.

Finally, three alternative federal research and development programs are presented.

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Home — Essay Samples — Science — Nuclear Power — The Pros and Cons of Nuclear Power

The Pros and Cons of Nuclear Power

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Nuclear Power Essay IELTS 2024: Writing Task 2 Latest Samples

• Updated On March 10, 2024
• Published In IELTS Preparation 💻

The IELTS exam tests how well-versed you are in the English language. It consists of 4 papers: reading, writing, listening, and speaking. Essay writing can be daunting if you’re not conversant in its framework and concept. This blog will assist you in writing Nuclear Power Essay IELTS and guide you on how to crack IELTS writing task 2.

Table of Contents

We’ll focus more on the nuclear power essay during this blog and walk you through the process. For guidance and reference on other topics and any other help regarding the IELTS exam , you can look through our website’s collection of blogs and obtain the assistance you need.

Nuclear Power Essay IELTS Sample Answer

Nuclear power is a very debated topic in every convention and has always been questioned for the bad it does rather than its good. In my opinion, nuclear power needs to be used, and the user should also be controlled and hedged with renewable energy sources as they are the only viable solution. Nuclear plants currently provide 11% of the world’s electricity. With an ever-increasing demand for electricity being seen everywhere and the fossil fuels reducing each day, it is now more important than ever that major decisions should be made. In the upcoming decades, energy consumption will only increase and meet the rising demand; nuclear power plants will be required as they are the best source of traditional energy-producing sources. Although nuclear power plants are required, it is also necessary to gradually push renewable energy sources and promote them to create a sustainable future for future generations. Nuclear power plants’ waste disposal and radioactivity are the concerning factors that have been the hot topic of most debates at conventions and meetings. In addition to that, a single misuse of this tremendous power can result in the disruption of life for all mankind. Striking a balance between the two will be crucial in the coming time as global warming and the energy crisis are on a constant rise. If nothing is done in the near time, countries could get submerged underwater within the coming decades, and the entire world will have to fight for survival.

Writing Task 2

The writing section of the IELTS exam consists of two sections. Writing task 2 is an essay writing task that requires deep thinking and coherence. This task will be our focus for this blog, as the rules and guidelines of the IELTS exam can be confusing for students appearing for the first time. Writing task 2 has the subsequent guidelines:

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• The essay should have a minimum of 250 words. An essay written in less than 250 words will be penalised and negatively marked. There is no penalty for writing a longer essay, but it will cause you to stray off-topic and waste time.
• 40 minutes is a good enough time to complete this task and will leave you with time to recheck your answer.
• The essay’s contents should be written with perfect grammar and solely focused on the topic.
• You can be penalised if you stray off-topic while writing your essay. All the sentences must be related and formed to provide a clear view and information.
• The content must be well structured to fetch the best results and have proper cohesion between the sentences.
• The tone of your answer must be academic or semi-formal and should discuss the given topic at length and focus on proper and sophisticated language.
• Using bullet points and notes is not allowed in the IELTS exam . The real answer must be written together and broken into paragraphs to better examine your writing style and structure.

Structure of Essay in Writing Task 2

The structure of the essay in writing task 2 is the base of your essay, and a clear idea of the structure will make it much easier for you to finish the essay on time. The structure of the essay can be broken down in the following way:

• First Paragraph
• Second Paragraph
• Third Paragraph
• Fourth Paragraph

The first paragraph of your essay should provide a small introduction to the topic and provide an opinion of yours about what side you are on about the topic. The first paragraph should be minimal and to the point. A clear and concise introduction leaves a good impression on the examiner. The second paragraph should begin with your stance on the topic. The first sentence should provide clarity on your stance. The second sentence should build on that idea and delve deeper into the specifics. The next sentences are suitable for providing an example and developing it in detail. You can make up research studies and quote them in your essay to support your point. At the end of the paragraph, end with a statement that sums up the overall idea of the paragraph and supports the idea you started with. The third paragraph is very similar in structure to the second paragraph. The main objective of this paragraph is to provide either the opposite view of the topic or discuss new ideas that touch on a different perspective of the topic but ultimately support your opinion. The structuring is the same as in the second paragraph, with minute changes. The fourth paragraph is the conclusion of your essay and, just like the introduction, should be minimal. Summing up your essay with a statement supporting your opinion and overall idea is best advised.

Score well on IELTS Nuclear Essay by understanding the Writing task 2 structure above. Add Brownie points for writing answers with facts, examples and evidence. For more related content, head on to LeapScholar blogs. Avail of one-on-one guidance from India’s top IELTS educators from the Leap Scholar Premium course .

Frequently Asked Questions

1. what are the pros and cons of nuclear power.

Ans: Nuclear energy is a widely used method of production of electricity. The benefits of nuclear technology and the main advantages of nuclear power are: a. No production of harmful gases that cause air pollution b. Clean source of energy c. Low cost of fuel d. Long-life once constructed e. A massive amount of energy produced f. Unlike most energy production methods, nuclear energy does not contribute to the increase in global warming

Disadvantages: a. Very high cost of construction of the facility. b. Waste produced is very toxic and requires proper and safe disposal, which is costly. c. If any accident happens, it can have a major impact on everyone and can be devastating. d. Mining of uranium 235, which is nuclear fuel, is very expensive.

2. Does Japan have a plan for dealing with its own nuclear waste problem?

Ans: As per the latest news and research, Japan does not have a proper nuclear waste dumping structure even after the Fukushima disaster in 2011. The Fukushima disaster was caused by the Tohoku earthquake and tsunami that hit Japan in 2011 and caused meltdowns and hydrogen explosions at the Fukushima Daiichi Nuclear Reactor. It was the worst recorded nuclear disaster since Chernobyl. Japan is said to have enough nuclear waste to create nuclear arsenals. In April 2021, Japan declared they would be dumping 1.2 million tonnes of nuclear waste into the sea. This is the same Japan that called the 1993 ocean dumping by Russia “extremely regrettable.” The discharges are bound to begin by 2023, and various legal proceedings and protests have been going on inside Japan against this inhuman decision that would destroy marine life.

3. How many countries have nuclear power plants?

Ans : Currently, 32 countries in the world possess nuclear power plants within their boundaries.

4. Why do people oppose nuclear power?

Ans: Opposition to nuclear power has been a long-standing issue. It is backed by a variety of reasons which are as follows:Nuclear waste is hard to dispose of, and improper disposal affects the radioactivity levels and can disrupt the normal life of people as well as animals. Nuclear technology is another concern of people as the usage of nuclear power plants leads to deeper research into the nuclear field. In today’s world, anything can be weaponised, and the threat of nuclear weapons is one of the drawbacks of nuclear power. This brings the threat of nuclear war and disruption of world peace. Any attack on nuclear power plants by terrorist organisations can result in a massive explosion that can disrupt and destroy human life and increase radioactivity to alarming levels around the site of the explosion.

5. What is the best way to dispose of nuclear waste?

Ans: Nuclear waste needs to be disposed of properly to prevent radioactive issues in the environment. The best methods to dispose of nuclear waste are as follows: a. Incineration : Radioactive waste can be incinerated in large scale incinerators with low production of waste. b. Deep burial: Nuclear waste can be buried deep into the ground as the radioactivity of nuclear waste wears off over time. This method is used for waste that is highly radioactive and will take a longer time to lose its radioactivity. c. Storage: Nuclear waste with low radioactivity is stored by some countries in storage. This is because their radioactive decay takes lesser time and can be disposed of safely once the radiation wears off.

6. Is it possible to produce electricity without using fossil fuels?

Ans: At the moment, 11% of the world’s electricity is produced by nuclear power plants alone. Replacing fossil fuel-based energy with renewable needs to be done gradually and properly. Renewable energy sources such as solar, hydro, and wind will have to be promoted and pushed to create a sustainable future. Renewable energy sources provide cheap energy, do not use up natural resources and fossil fuels and are much cheaper to construct than a nuclear power station.

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Molten Salt Reactor Technology Solves Several Nuclear Industry Problems

Molten salt reactors (MSRs) represent a fascinating intersection of nuclear history and modern innovation. The concept of using molten salts as both a coolant and fuel carrier dates back to the 1950s, with the pioneering work of Alvin Weinberg and his team at Oak Ridge National Laboratory (ORNL). In 1965, ORNL successfully operated the Molten Salt Reactor Experiment (MSRE), a proof-of-concept reactor that demonstrated the technology’s feasibility and inherent safety features.

The MSRE achieved remarkable results, operating for four years from January 1965 through December 1969, and logging more than 13,000 hours at full power during that time. The trial showcased the MSR’s ability to operate at high temperatures with excellent thermal efficiency, its inherent safety characteristics due to the low-pressure liquid fuel, and its potential for online refueling and fission product removal. Additionally, the MSRE demonstrated the ability to breed fissile material from thorium, a more abundant and readily available resource than uranium.

Despite its success, the molten salt program ended in 1973, with the Atomic Energy Commission deciding to focus on other nuclear reactor designs. However, the knowledge gained from the MSRE project laid the groundwork for future MSR development.

Today, MSRs are experiencing a resurgence of interest worldwide, with numerous companies and research institutions actively developing various designs. MSRs offer several potential advantages, including enhanced safety, reduced waste generation, and the ability to utilize thorium as a fuel source, as previously mentioned.

“There are several molten salt reactor companies that are in the process of cutting deals and getting MOIs [memorandums of intent] with foreign countries,” Mike Conley, author of the book Earth Is a Nuclear Planet: The Environmental Case for Nuclear Power , said as a guest on The POWER Podcast . Conley is a nuclear energy advocate and strong believer in MSR technology. He called MSRs “a far superior reactor technology” compared to light-water reactors (LWRs).

The thorium fuel cycle is a key component in at least some MSR designs. The thorium fuel cycle is the path that thorium transmutes through from fertile source fuel to uranium fuel ready for fission. Thorium-232 (Th-232) absorbs a neutron, transmuting it into Th-233. Th-233 beta decays to protactinium-233 (Pa-233), and finally undergoes a second beta minus decay to become uranium-233 (U-233). This is the one way of turning natural and abundant Th-232 into something fissionable. Since U-233 is not naturally found but makes an ideal nuclear reactor fuel, it is a much sought-after fuel cycle.

“The best way to do this is in a molten salt reactor, which is an incredible advance in reactor design. And the big thing is, whether you’re fueling a molten salt reactor with uranium or thorium or plutonium or whatever, it’s a far superior reactor technology. It absolutely cannot melt down under any circumstances whatsoever period,” said Conley.

Conley suggested that most of the concern people have about nuclear power revolves around the spread of radioactive material. Specifically, no matter how unlikely it is, if an accident occurred and contamination went airborne, the fact that it could spread beyond the plant boundary is worrisome to many people who oppose nuclear power. “The nice thing about a molten salt reactor is: if a molten salt reactor just goes belly up and breaks or gets destroyed or gets sabotaged, you’ll have a messed-up reactor room with a pancake of rock salt on the floor, but not a cloud of radioactive steam that’s going to go 100 miles downwind,” Conley explained.

And the price for an MSR could be much more attractive than the cost of currently available GW-scale LWR units. “The ThorCon company is predicting that they will be able to build for $1 a watt,” said Conley. “That’s one-fourteenth of what Vogtle was,” he added, referring to Southern Company’s nuclear expansion project in Georgia , which includes two Westinghouse AP1000 units. Of course, projections do not always align with reality, so MSR pilot projects will be keenly watched to validate claims.

There is progress being made on MSR projects. For example, in February 2022, TerraPower and Southern Company announced an agreement to design, construct, and operate the Molten Chloride Reactor Experiment (MCRE)—the world’s first critical fast-spectrum salt reactor—at Idaho National Laboratory (INL). Since then, Southern Company reported successfully commencing pumped-salt operations in the Integrated Effects Test (IET), signifying a major achievement for the project. The IET is a non-nuclear, externally heated, 1-MW multiloop system, located at TerraPower’s laboratory in Everett, Washington. “The IET will inform the design, licensing, and operation of an approximately 180-MW MCFR [Molten Chloride Fast Reactor] demonstration planned for the early 2030s timeframe,” Southern Company said.

What may hold MSRs back in the U.S., however, is a lack of understanding within U.S. Nuclear Regulatory Commission circles. “Unfortunately, the Nuclear Regulatory Commission knows everything about light-water reactors—high-pressure, water-cooled, solid-fuel reactors—and knows almost nothing about unpressurized liquid-fuel reactors. So, until they get up to speed, our nuclear technology has to stay within nuclear regulations, and they haven’t studied it enough. So, basically, we’re stuck with using pressurized light-water reactors,” Conley said.

Still, Conley believes there is a path for MSRs to get built sooner rather than later, as he sees regulators in other parts of the world being more open to the technology. “Rest assured, molten salt reactors will be built in the next 10 years, but they will be built overseas,” said Conley.

To hear the full interview with Conley, which contains much more about the benefits of nuclear power and the role it could play in decarbonizing the world, how nuclear power can contribute to a diversified grid, ways to reduce costs for nuclear construction projects, the advantages offered by small modular reactors, how nuclear waste concerns could be addressed, how misinformation is affecting public perceptions around nuclear power, and more, listen to  The POWER Podcast . Click on the SoundCloud player below to listen in your browser now or use the following links to reach the show page on your favorite podcast platform:

• Apple Podcasts
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• Amazon Music

For more power podcasts, visit  The POWER Podcast archives .

— Aaron Larson is POWER’s executive editor (@AaronL_Power, @POWERmagazine).

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