Nuclear output in France

March 2024 March 2025 Change
Output of the month 29.9TWh 31.9TWh 6.7%
Cumulative output 96.6TWh 102.7TWh 6.4%

Nuclear output in March 2025 amounted to 31.9TWh, up 2TWh compared to the same period in 2024.

Since the beginning of the year, cumulative annual output was 102.7TWh, up by 6.2TWh compared to 2024. This is explained by the good availability of the reactors in operation, shorter than expected outages.

Evolution of cumulative nuclear output in France in March 2025 (description bellow)

Nuclear output in the United Kingdom

March 2024 March 2025 Change
Output of the month 2.7TWh 2.7TWh 1.6%
Cumulative output 7.6TWh 8.8TWh 15.7%

Nuclear output in March 2025 was 2.7TWh, like in March 2024. 

Cumulative output was 8.8TWh, up by 1.2TWh because of steam valve incidents that impacted output significantly at Hartlepool and Heysham 1 in early 2024

Evolution of cumulative nuclear output in UK in March 2025 (description bellow)