EDF and RTE data show France reduced nuclear generation by 14% due to elevated river temperatures limiting reactor cooling.
France cut nuclear power output by 6.4 gigawatts on Monday as a severe heatwave raised river temperatures, restricting the use of water for cooling reactors. The reduction affected eight reactors, according to grid and plant operator data.
The 6.4 GW curtailment represents 14% of France’s total nuclear capacity, a significant drop for Europe’s largest nuclear power producer. Similar output reductions have occurred during past heatwaves, though this year’s cuts align with heightened summer demand.
No immediate market reaction was reported, but the reduction may tighten power supplies in neighboring European markets reliant on French exports.