Nuclear output in France

October 2024 October 2025 Change
Output of the month 30.0TWh 30.4TWh 1.3%
Cumulative output 292.0TWh 299.5TWh 2.6%

Nuclear output in October 2025 amounted to 30.4TWh, up by 0.4TWh vs October 2024.

Since the beginning of the year, cumulative annual output was 299.5 TWh, up by 7.5TWh compared to 2024. This is explained by the good availability of the reactors in operation, well managed outages and still a strong modulation.

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

Nuclear output in the United Kingdom

October 2024 October 2025 Change
Output of the month 2.9TWh 2.4TWh -17.1%
Cumulative output 31.4TWh 27.8TWh -11.8%

Nuclear output in October was 2.4TWh, down 0.5TWh vs October 2024.

Cumulative output was 27.8TWh, 3.7TWh lower than prior year. Steam valve incidents impacted the output at Hartlepool and Heysham 1 in 2024, whereas an important maintenance programme and outages occured in 2025.

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