United Kingdom Nuclear Power: Generation, Share and Trend
The United Kingdom generated 36.4 TWh of electricity from nuclear in 2025, 12.3% of its total, according to Ember. That made it the 13th largest nuclear power producer in 2025 of the 32 countries with Ember data, comparing each country's latest year. Nuclear supplied 8.9% of the world's electricity in 2025. These are annual statistics for 2025, with monthly figures through July 2026; they are compiled from national sources and are not real time.
Key Facts
- The United Kingdom generated 36.4 TWh of electricity from nuclear in 2025.
- Nuclear supplied 12.3% of the United Kingdom's electricity in 2025.
- The United Kingdom was the 13th largest nuclear power producer in 2025 among the 32 countries with Ember data, comparing each country's latest year.
- The United Kingdom's nuclear generation in 2025 was 28% lower than in 2020, when it was 50.2 TWh.
- The United Kingdom's nuclear generation in 2025 was 48% lower than in 2015, when it was 70.3 TWh.
- The United Kingdom's nuclear generation peaked at 99.5 TWh in 1998.
- The United Kingdom's nuclear share in 2025 was above the world share of 8.9%.
- The United Kingdom had 5.88 GW of nuclear generating capacity in 2025.
Key Figures, 2025
| Measure | Value | As of / source |
|---|---|---|
| Nuclear generation | 36.4 TWh | 2025 · Ember |
| Share of the United Kingdom's electricity | 12.3% | 2025 · Ember |
| World share of nuclear | 8.9% | 2025 · Ember |
| Rank by nuclear generation (each country's latest year) | 13 of 32 | 2025 · Ember |
| Nuclear capacity | 5.88 GW | 2025 · Ember |
Nuclear Generation Year by Year
Ember annual statistics, 1985 to 2025Annual statistics through 2025, TWh
| Year | Nuclear |
|---|---|
| 1985 | 61.1 TWh |
| 1986 | 59.1 TWh |
| 1987 | 55.2 TWh |
| 1988 | 63.5 TWh |
| 1989 | 71.7 TWh |
| 1990 | 65.8 TWh |
| 1991 | 70.5 TWh |
| 1992 | 76.8 TWh |
| 1993 | 89.4 TWh |
| 1994 | 88.3 TWh |
| 1995 | 89.0 TWh |
| 1996 | 94.7 TWh |
| 1997 | 98.2 TWh |
| 1998 | 99.5 TWh |
| 1999 | 95.1 TWh |
| 2000 | 85.1 TWh |
| 2001 | 90.1 TWh |
| 2002 | 87.9 TWh |
| 2003 | 88.7 TWh |
| 2004 | 80.0 TWh |
| 2005 | 81.6 TWh |
| 2006 | 75.5 TWh |
| 2007 | 63.0 TWh |
| 2008 | 52.5 TWh |
| 2009 | 69.1 TWh |
| 2010 | 62.1 TWh |
| 2011 | 69.0 TWh |
| 2012 | 70.4 TWh |
| 2013 | 70.6 TWh |
| 2014 | 63.8 TWh |
| 2015 | 70.3 TWh |
| 2016 | 71.7 TWh |
| 2017 | 70.3 TWh |
| 2018 | 65.1 TWh |
| 2019 | 56.2 TWh |
| 2020 | 50.2 TWh |
| 2021 | 46.1 TWh |
| 2022 | 47.4 TWh |
| 2023 | 40.6 TWh |
| 2024 | 40.6 TWh |
| 2025 | 36.4 TWh |
Annual statistics through 2025, % of generation
| Year | United Kingdom | World |
|---|---|---|
| 1985 | 20.5% | n/a |
| 1986 | 19.6% | n/a |
| 1987 | 18.3% | n/a |
| 1988 | 20.6% | n/a |
| 1989 | 22.8% | n/a |
| 1990 | 20.6% | n/a |
| 1991 | 21.9% | n/a |
| 1992 | 23.9% | n/a |
| 1993 | 27.7% | n/a |
| 1994 | 27.0% | n/a |
| 1995 | 26.4% | n/a |
| 1996 | 27.0% | n/a |
| 1997 | 28.0% | n/a |
| 1998 | 27.4% | n/a |
| 1999 | 25.8% | n/a |
| 2000 | 22.6% | 16.6% |
| 2001 | 23.4% | 16.9% |
| 2002 | 22.7% | 16.5% |
| 2003 | 22.3% | 15.6% |
| 2004 | 20.3% | 15.6% |
| 2005 | 20.5% | 15.0% |
| 2006 | 19.0% | 14.7% |
| 2007 | 15.9% | 13.7% |
| 2008 | 13.5% | 13.4% |
| 2009 | 18.3% | 13.3% |
| 2010 | 16.3% | 12.8% |
| 2011 | 18.8% | 11.9% |
| 2012 | 19.4% | 10.8% |
| 2013 | 19.7% | 10.6% |
| 2014 | 18.9% | 10.5% |
| 2015 | 20.8% | 10.6% |
| 2016 | 21.2% | 10.4% |
| 2017 | 20.8% | 10.2% |
| 2018 | 19.5% | 10.1% |
| 2019 | 17.2% | 10.3% |
| 2020 | 16.2% | 9.9% |
| 2021 | 15.0% | 9.8% |
| 2022 | 14.6% | 9.1% |
| 2023 | 13.9% | 9.1% |
| 2024 | 14.3% | 9.0% |
| 2025 | 12.3% | 8.9% |
| Year | Generation | Share | World share | Capacity |
|---|---|---|---|---|
| 2025 | 36.4 TWh | 12.3% | 8.9% | 5.88 GW |
| 2024 | 40.6 TWh | 14.3% | 9.0% | 5.88 GW |
| 2023 | 40.6 TWh | 13.9% | 9.1% | 5.88 GW |
| 2022 | 47.4 TWh | 14.6% | 9.1% | 5.88 GW |
| 2021 | 46.1 TWh | 15.0% | 9.8% | 7.83 GW |
| 2020 | 50.2 TWh | 16.2% | 9.9% | 7.83 GW |
| 2019 | 56.2 TWh | 17.2% | 10.3% | 9.26 GW |
| 2018 | 65.1 TWh | 19.5% | 10.1% | 9.26 GW |
| 2017 | 70.3 TWh | 20.8% | 10.2% | 9.26 GW |
| 2016 | 71.7 TWh | 21.2% | 10.4% | 9.26 GW |
Full year by year history for United Kingdom
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of 2025. World shares are Ember's World totals; ranks compare each country's latest year, which can differ between countries.
Nuclear Generation Month by Month
Ember monthly statistics through July 2026Monthly statistics through July 2026, TWh
| Month | Nuclear |
|---|---|
| 2024-08 | 3.89 TWh |
| 2024-09 | 3.40 TWh |
| 2024-10 | 3.02 TWh |
| 2024-11 | 3.02 TWh |
| 2024-12 | 3.05 TWh |
| 2025-01 | 3.27 TWh |
| 2025-02 | 2.97 TWh |
| 2025-03 | 2.79 TWh |
| 2025-04 | 2.88 TWh |
| 2025-05 | 3.33 TWh |
| 2025-06 | 3.20 TWh |
| 2025-07 | 3.24 TWh |
| 2025-08 | 2.39 TWh |
| 2025-09 | 2.13 TWh |
| 2025-10 | 2.54 TWh |
| 2025-11 | 2.67 TWh |
| 2025-12 | 2.75 TWh |
| 2026-01 | 2.86 TWh |
| 2026-02 | 2.70 TWh |
| 2026-03 | 2.83 TWh |
| 2026-04 | 3.73 TWh |
| 2026-05 | 2.45 TWh |
| 2026-06 | 2.12 TWh |
| 2026-07 | 2.37 TWh |
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of July 2026. Monthly figures for the United Kingdom can differ slightly from the annual totals.