Nuclear output in France

August 2024 August 2025 Change
Output of the month 28.6TWh 28.6TWh 0.0%
Cumulative output 234.6TWh 240.0TWh 2.3%

Nuclear output in August 2025 amounted to 28.6TWh, like in 2024.

Since the beginning of the year, cumulative annual output was 240 TWh, up by 5.4TWh compared to 2024. This is explained by the good availability of the reactors in operation, shorter than expected outages and still a strong modulation.

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

Nuclear output in the United Kingdom

August 2024 August 2025 Change
Output of the month 3.7TWh 2.7TWh -26.1%
Cumulative output 25.2TWh 23.6TWh -6.3%

Nuclear output in August was 2.7TWh, down 1TWh vs August 2024.

Cumulative output was 23.6TWh, 1.6TWh 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 August 2025 (description bellow)