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.
For the latest news and articles on the transport sector read New Energy World.
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?
Hinkley C – getting to the heart of the matter
11/07/2024
Presented by Simon Parsons, Hinkley Point C Nuclear Island Area Director, EDF Energy, it features the preparations to install the first nuclear reacto...
First nuclear fusion plasma achieved in private-sector Chinese nuclear fusion tokamak
03/07/2024
HH70’s toroidal magnetic field is 0.6 Tesla, with a plasma major radius of 0.75 metres. Its magnet system consists of 26 high-temperature superconduct...
Largest solar farm in northern Italy comes online, while Solar Academy is launched
03/07/2024
Solar installation on former nuclear plantThe 87 MW Trino project consists of 160,000 bifacial photovoltaic (PV) panels that will produce ...
Slow progress in the EU power sector undermining low-carbon transition
12/06/2024
With the EU power sector increasingly under pressure to decarbonise, a new report by enterprise sustainability data services provider GRESB has reveal...
UN chief calls for a windfall tax and advertising ban for fossil fuels
12/06/2024
Speaking at the American Museum of Natural History in New York on World Environment Day on 5 June, Guterres noted that the European Commission’s Coper...
Events and training
EI Fellows on Fusion - hosted by Sir Ian Chapman & the UK Atomic Energy Authority
26/09/2024
This free-of-charge topical event and networking session is open to all Fellows, but registration is essential.
WPC Energy UK National Committee Expert Workshop 2024
31/10/2024
Explore key challenges and potential solutions on the road to net zero.
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
Guidance on quantified human reliability analysis (QHRA)
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
2022
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
2022
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...