Belarus Has Added the Most Nuclear Share Since 2020: +36.5 points
Ember's latest complete year of country data is 2025. Among the 82 countries that generated at least 10 TWh of electricity in 2025, Belarus moved most, +36.5 points since 2020 (37.4% in 2025). Worldwide, nuclear supplied 8.8% of electricity in 2025, against 9.9% in 2020. 1 country has exited nuclear, with a past peak of at least 1.00 TWh and under 100 GWh in 2025 and in the year before.
Key Facts
- The latest complete Ember year of country data is 2025; each country is compared with its own 2020 and 2015 figures.
- World nuclear generation was 2,805 TWh in 2025, 8.8% of world electricity (2,649 TWh and 9.9% in 2020).
- Over 2020 to 2025, Belarus added the most nuclear share: +36.5 points, to 37.4% in 2025.
- Over 2015 to 2025, Belarus added the most nuclear share: +37.4 points, to 37.4% in 2025.
- In absolute terms, China changed most over 2020 to 2025: +119 TWh of nuclear generation.
- Over 2015 to 2025, China changed most in absolute terms: +314 TWh of nuclear generation.
- Germany was furthest below its nuclear peak: 0 TWh in 2025 against 171 TWh in 2001.
- 1 country exited nuclear by 2025, including Germany.
- 20 countries have reached "nuclear share over 20%" at some point through 2025; the earliest crossing in Ember's series is the United States in 2001.
- 12 countries have reached "nuclear share over 40%" at some point through 2025; the earliest crossing in Ember's series is South Korea in 1986.
Top Movers in Nuclear Share
Ember, 2015 to 2025| Year | Belarus | United Arab Emirates | Slovakia | Pakistan | Finland |
|---|---|---|---|---|---|
| 2010 | 0.0% | n/a | 53.1% | 2.7% | 28.3% |
| 2011 | 0.0% | n/a | 54.5% | 4.1% | 31.6% |
| 2012 | 0.0% | n/a | 54.7% | 5.4% | 32.7% |
| 2013 | 0.0% | n/a | 55.2% | 4.2% | 33.1% |
| 2014 | 0.0% | 0.0% | 57.1% | 4.2% | 34.6% |
| 2015 | 0.0% | 0.0% | 56.9% | 3.8% | 33.9% |
| 2016 | 0.0% | 0.0% | 55.1% | 4.4% | 33.7% |
| 2017 | 0.0% | 0.0% | 55.0% | 6.2% | 33.3% |
| 2018 | 0.0% | 0.0% | 55.7% | 7.2% | 32.5% |
| 2019 | 0.0% | 0.0% | 54.2% | 6.7% | 34.8% |
| 2020 | 0.9% | 1.2% | 54.2% | 7.4% | 33.6% |
| 2021 | 14.0% | 7.1% | 53.0% | 9.6% | 32.7% |
| 2022 | 12.6% | 12.9% | 60.0% | 14.9% | 35.1% |
| 2023 | 28.1% | 20.6% | 62.1% | 15.4% | 42.1% |
| 2024 | 34.2% | 22.9% | 61.8% | 15.3% | 39.5% |
| 2025 | 37.4% | 21.2% | 66.4% | 14.0% | 39.8% |
Nuclear Share and Generation by Country, 2025
31 countries| Country | Share 2025 | Share change since 2020 | Share change since 2015 | Generation 2025 | Change since 2020 | Change since 2015 | Peak year | Below peak |
|---|---|---|---|---|---|---|---|---|
| ๐ง๐พ Belarus | 37.4% | +36.5 points | +37.4 points | 17.0 TWh | +16.6 TWh | +17.0 TWh | 2025 | At peak |
| ๐ฆ๐ช United Arab Emirates | 21.2% | +20.0 points | +21.2 points | 39.1 TWh | +37.4 TWh | +39.1 TWh | 2024 | 3.9% |
| ๐ธ๐ฐ Slovakia | 66.4% | +12.3 points | +9.5 points | 19.3 TWh | +3.88 TWh | +4.17 TWh | 2025 | At peak |
| ๐ต๐ฐ Pakistan | 14.0% | +6.6 points | +10.2 points | 24.0 TWh | +13.9 TWh | +19.7 TWh | 2025 | At peak |
| ๐ซ๐ฎ Finland | 39.8% | +6.2 points | +6.0 points | 32.8 TWh | +9.51 TWh | +9.55 TWh | 2023 | 4.4% |
| ๐ฏ๐ต Japan | 9.2% | +4.9 points | +8.7 points | 94.1 TWh | +51.1 TWh | +89.5 TWh | 1998 | 71.1% |
| ๐จ๐ฟ Czechia | 42.3% | +4.8 points | +9.8 points | 32.0 TWh | +1.91 TWh | +5.11 TWh | 2025 | At peak |
| ๐ธ๐ฎ Slovenia | 39.3% | +1.7 points | +1.1 points | 5.84 TWh | -510 GWh | +190 GWh | 2014 | 8.3% |
| ๐ฐ๐ท South Korea | 29.4% | +1.7 points | -0.7 points | 185 TWh | +24.5 TWh | +19.9 TWh | 2024 | 2.2% |
| ๐ซ๐ท France | 68.3% | +1.2 points | -7.9 points | 392 TWh | +38.2 TWh | -45.4 TWh | 2005 | 13.2% |
| ๐ฆ๐ท Argentina | 7.0% | +0.1 points | +2.2 points | 10.8 TWh | +750 GWh | +3.72 TWh | 2025 | At peak |
| ๐ฟ๐ฆ South Africa | 4.2% | +0.1 points | -0.7 points | 10.2 TWh | +310 GWh | -2.03 TWh | 2016 | 32.1% |
| ๐จ๐ณ China | 4.6% | -0.1 points | +1.7 points | 485 TWh | +119 TWh | +314 TWh | 2025 | At peak |
| ๐ง๐ท Brazil | 2.1% | -0.2 points | -0.5 points | 15.8 TWh | +1.75 TWh | +1.07 TWh | 2019 | 2.0% |
| ๐ฎ๐ณ India | 2.6% | -0.3 points | -0.3 points | 53.8 TWh | +9.20 TWh | +15.5 TWh | 2024 | 1.6% |
| ๐ท๐ด Romania | 20.5% | -0.3 points | +2.8 points | 10.2 TWh | -1.27 TWh | -1.44 TWh | 2009 | 13.2% |
| ๐ณ๐ฑ Netherlands | 3.0% | -0.4 points | -0.8 points | 3.98 TWh | -110 GWh | -100 GWh | 2009 | 6.4% |
| ๐ฎ๐ท Iran | 1.4% | -0.5 points | +0.1 points | 5.39 TWh | -940 GWh | +1.89 TWh | 2024 | 23.4% |
| ๐ฒ๐ฝ Mexico | 2.6% | -0.8 points | -1.1 points | 10.1 TWh | -1.08 TWh | -1.48 TWh | 2018 | 25.5% |
| ๐ท๐บ Russia | 18.3% | -1.6 points | -0.0 points | 219 TWh | +2.71 TWh | +23.2 TWh | 2022 | 2.3% |
| ๐จ๐ฆ Canada | 12.9% | -2.0 points | -2.4 points | 84.8 TWh | -12.7 TWh | -16.3 TWh | 1994 | 20.8% |
| ๐บ๐ธ United States | 17.4% | -2.2 points | -2.2 points | 785 TWh | -5.10 TWh | -12.4 TWh | 2019 | 3.0% |
| ๐ง๐ฌ Bulgaria | 39.0% | -2.4 points | +7.5 points | 14.9 TWh | -1.77 TWh | -520 GWh | 2002 | 26.5% |
| ๐ธ๐ช Sweden | 27.4% | -2.6 points | -7.4 points | 46.7 TWh | -2.55 TWh | -9.70 TWh | 2004 | 39.8% |
| ๐ช๐ธ Spain | 18.8% | -3.7 points | -1.9 points | 54.1 TWh | -4.19 TWh | -3.09 TWh | 2001 | 15.1% |
| ๐ฌ๐ง United Kingdom | 12.4% | -3.8 points | -8.4 points | 36.4 TWh | -13.9 TWh | -34.0 TWh | 1998 | 63.4% |
| ๐จ๐ญ Switzerland | 29.9% | -5.2 points | -5.1 points | 19.4 TWh | -4.59 TWh | -3.66 TWh | 2007 | 30.4% |
| ๐ง๐ช Belgium | 33.5% | -5.5 points | -4.6 points | 24.2 TWh | -10.3 TWh | -1.95 TWh | 2021 | 52.0% |
| ๐ญ๐บ Hungary | 40.1% | -5.9 points | -12.1 points | 16.1 TWh | +30.0 GWh | +260 GWh | 2019 | 1.2% |
| ๐น๐ผ Taiwan | 1.1% | -10.1 points | -13.0 points | 3.24 TWh | -28.2 TWh | -33.2 TWh | 2014 | 92.4% |
| ๐ฉ๐ช Germany | 0.0% | -11.4 points | -14.4 points | 0 TWh | -64.4 TWh | -91.8 TWh | 2001 | 100.0% |
Countries that generated at least 10 TWh of electricity in 2025 and have published 2025, 82 in this data, with at least 100 GWh of nuclear in some year. Each is compared with its own 2020 and 2015 values; a blank means Ember has no figure for that year. Peak is the highest annual nuclear generation in the country's series.
Nuclear share over 20%: When Each Country Got There
20 countries| Country | First year over | Share 2025 | Status in 2025 |
|---|---|---|---|
| ๐ฏ๐ต Japan | By 1985 | 9.2% | Fell back under |
| ๐ฐ๐ท South Korea | By 1985 | 29.4% | Still over |
| ๐น๐ผ Taiwan | By 1985 | 1.1% | Fell back under |
| ๐ฌ๐ง United Kingdom | By 1985 | 12.4% | Fell back under |
| ๐ง๐ช Belgium | By 1990 | 33.5% | Still over |
| ๐ง๐ฌ Bulgaria | By 1990 | 39.0% | Still over |
| ๐จ๐ฟ Czechia | By 1990 | 42.3% | Still over |
| ๐ซ๐ฎ Finland | By 1990 | 39.8% | Still over |
| ๐ซ๐ท France | By 1990 | 68.3% | Still over |
| ๐ฉ๐ช Germany | By 1990 | 0.0% | Fell back under |
| ๐ญ๐บ Hungary | By 1990 | 40.1% | Still over |
| ๐ธ๐ฐ Slovakia | By 1990 | 66.4% | Still over |
| ๐ธ๐ฎ Slovenia | By 1990 | 39.3% | Still over |
| ๐ช๐ธ Spain | By 1990 | 18.8% | Fell back under |
| ๐ธ๐ช Sweden | By 1990 | 27.4% | Still over |
| ๐จ๐ญ Switzerland | By 2000 | 29.9% | Still over |
| ๐บ๐ธ United States | 2001 | 17.4% | Fell back under |
| ๐ท๐ด Romania | 2009 | 20.5% | Still over |
| ๐ง๐พ Belarus | 2023 | 37.4% | Still over |
| ๐ฆ๐ช United Arab Emirates | 2023 | 21.2% | Still over |
First year in Ember's annual series with a share at or above 20%. "By" means the country's series already started over the line, so the true year is earlier or unknown.
Nuclear share over 40%: When Each Country Got There
12 countries| Country | First year over | Share 2025 | Status in 2025 |
|---|---|---|---|
| ๐น๐ผ Taiwan | By 1985 | 1.1% | Fell back under |
| ๐ฐ๐ท South Korea | 1986 | 29.4% | Fell back under |
| ๐ง๐ช Belgium | By 1990 | 33.5% | Fell back under |
| ๐ซ๐ท France | By 1990 | 68.3% | Still over |
| ๐ญ๐บ Hungary | By 1990 | 40.1% | Still over |
| ๐ธ๐ฐ Slovakia | By 1990 | 66.4% | Still over |
| ๐ธ๐ช Sweden | By 1990 | 27.4% | Fell back under |
| ๐ง๐ฌ Bulgaria | 1994 | 39.0% | Fell back under |
| ๐จ๐ญ Switzerland | By 2000 | 29.9% | Fell back under |
| ๐ธ๐ฎ Slovenia | 2022 | 39.3% | Fell back under |
| ๐จ๐ฟ Czechia | 2023 | 42.3% | Still over |
| ๐ซ๐ฎ Finland | 2023 | 39.8% | Fell back under |
First year in Ember's annual series with a share at or above 40%. "By" means the country's series already started over the line, so the true year is earlier or unknown.
Countries That Have Exited Nuclear
1 country| Country | Peak year | Peak generation | Generation 2025 | Near zero since |
|---|---|---|---|---|
| ๐ฉ๐ช Germany | 2001 | 171 TWh | 0 TWh | 2024 |
Exit means a peak of at least 1 TWh in the series and under 100 GWh in both 2025 and the year before. Near zero since is the first year of the unbroken run under 100 GWh that continues to 2025. A country with only one near zero year is not counted, because a single year can be a gap in Ember's series.
Source: Ember (ember-energy.org), licensed under CC BY 4.0. Data as of 2025. Annual statistics from Ember, complete years to 2025.
Related
Cite this page
World Power Monitor. (2025). Nuclear Power Trends by Country: Change Since 2020 and 2015. https://worldpowermonitor.com/transition/nuclear/
World Power Monitor. Nuclear Power Trends by Country: Change Since 2020 and 2015. Data as of 2025. Data from Ember. https://worldpowermonitor.com/transition/nuclear/
@misc{wpm_transition_nuclear_2025,
title = {{Nuclear Power Trends by Country: Change Since 2020 and 2015}},
author = {{World Power Monitor}},
year = {2025},
note = {Data as of 2025. Data from Ember.},
url = {https://worldpowermonitor.com/transition/nuclear/}
} Permalink: https://worldpowermonitor.com/transition/nuclear/
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