Nuclear output in France

June 2024 June 2025 Change
Output of the month 26.4TWh 26.2TWh -0.7%
Cumulative output 177.4TWh 181.8TWh 2.5%

Nuclear output in June 2025 amounted to 26.2TWh, down -0.2TWh compared to the same period in 2024.

Since the beginning of the year, cumulative annual output was 181.8TWh, up by 4.4TWh compared to 2024. This is explained by the good availability of the reactors in operation, shorter than expected  outages but a strong modulation in May and June and the impact of the heat wave.

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

Nuclear output in the United Kingdom

June 2024 June 2025 Change
Output of the month 3.4TWh 3.2TWh -7.3%
Cumulative output 18.1TWh 17.8TWh -1.5%

Nuclear output in June was 3.2TWh, down 0.2TWh vs June 2024.

Cumulative output was 17.8TWh, 0.3TWh 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 June 2025 (description bellow)