Nuclear power is the second-largest source of low-carbon electricity today, supplying 10.5% of global electricity
Nuclear power is generated by a controlled chain reaction inside a nuclear reactor, most commonly in a process called nuclear fission. In fission, neutrons collide with uranium or plutonium atoms, causing the atoms to split and release additional neutrons and energy in the form of heat. This heat is used to convert water into steam, which drives turbines to produce electricity. A nuclear reactor was first used to produce electricity in the 1950s, in light of discoveries made through research efforts previously focused on developing nuclear weaponry. A series of commercial reactors for electricity production have since been developed. Today, nuclear power is gaining importance driven by the climate change agenda since it emits minimal greenhouse gases, at levels similar to renewable energy in terms of total life cycle emissions per unit of energy generated. Nuclear power projects are heavily dependent on government policy due to their capital-intensive nature, and are strictly regulated as they deal with radioactive materials.
Nuclear power is controversial in some locations due to these radioactive materials and the potential health hazards they pose. A number of destructive accidents have occurred in the history of nuclear power; these include the Chernobyl disaster in the Soviet Union in 1986 and the Fukushima disaster in Japan in 2011. Different nations have widely different visions for the deployment of nuclear power, ranging from France’s 75% dependence on nuclear power for electricity generation to Germany having announced decision to shut down all of its nuclear power plants by 2022. Another important aspect is the disposal of nuclear waste; spent fuel remains active for tens of thousands of years and a proven long-term solution for safely managing and disposing of this radioactive waste is yet to be developed. Although newer, safer and more efficient reactor designs are being constructed today, nuclear power has an uncertain future challenged by public acceptance, costs, fuel resource sustainability and nuclear waste management.
As a potentially safer and less waste-generating type of reaction than fission, nuclear fusion is an ongoing area of research. Several experimental reactors exist, but commercial-scale results remain far from realisation. Small modular reactors are also attracting interest, as they allow for greater flexibility with potential benefits particularly for developing countries with limited grid capacity.
Learn more about nuclear power by reading our Energy Insights.
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Read energy professional's thoughts on the future of nuclear in our Energy Barometer.
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of CO2 emissions have been avoided by using nuclear power over the past 50 years, nearly equal to 2 years of global energy-related CO2 emissions (IEA)
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reactors are operating around the world, providing 392 GW of civil nuclear power capacity, almost 95 GW of which is located in the US (World Nuclear Association)
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of all radioactive waste from nuclear power by volume is highly radioactive and requires permanent isolation from the environment (World Nuclear Association)
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people in Britain are working on Hinkley Point C – the first new nuclear power station to be built in the UK in over 20 years (EDF Energy)
What's new?
US government offers Palisades nuclear plant $1.52bn loan guarantee to help fund restart
10/04/2024
The project aims to bring back online the single-unit Combustion Engineering-designed pressurised water reactor and upgrade it to produce baseload pow...
Blueprint to decarbonise the UK’s electricity grid published
27/03/2024
The report outlines a plan to connect a further 21 GW of offshore wind in development off the coast of Scotland to the grid in ‘an efficient and coord...
Year’s delay proposed for UK’s clean heat market mechanism
27/03/2024
The proposal is an addendum to the government response to the CHMM consultation, published on 30 November 2023. Views are being sought on the new impl...
Global nuclear SMR project pipeline expands to 22 GW
20/03/2024
The report finds that the current project pipeline would require an investment of close to $176bn. ‘The nuclear power market has been gaining momentu...
UK budget extension of windfall profits tax disappoints leading offshore energy industries body OEUK
13/03/2024
David Whitehouse, Chief Executive of Offshore Energies UK (OEUK), decried the decision to extend the windfall tax on North Sea oil and gas producers –...
Events and training
Human Factors Foundation - November 2024
04/11/2024 - 08/11/2024
This 5-day course delivers a comprehensive introduction into human factors for non-specialists. It provides a practical, engaging and interactive back...
Technical guidance publications
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2022
This document is free to download for all registered users of this site.EI Guidance on quantified human reliability analysis (QHRA) (second edition) p...
Guidance on ensuring control room operator (CRO) competence
2022
This publication is free to download for registered users.Control room operators (CROs) perform a critical role in running normal operations, infreque...
Research report: Modelling toxic hazards of sour water releases – consolidated knowledge of sour water releases physics and chemistry
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The EI's Process Safety Committee (PSC) has identified that many petroleum refinery and gas separation plant process operations generate aqueous solut...
Engaging contractors: Partnership approaches to improving safety in the power industry
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This publication was developed in response to demand from operators and contractors within the power generation sector, recognising that the safe and ...
Research report: Achieving greater resilience to major events – Organisational learning for safety risk management in complex environments
2021
This document is free to download for registered users.This report has been split into the following three sections:Part 1: Cultural precursors to maj...