Extreme heat and low river and reservoir water levels are forcing nuclear power plants in parts of Europe to cut electricity output. With warm cooling water and reduced water availability, operators limit generation to comply with safety and environmental requirements.
DW reports that, measured over the course of more than a year, the overall energy losses from these heat-related constraints are relatively small. However, the impact can be more significant on certain high-demand or otherwise critical days, when reduced nuclear generation affects power system balance. In those periods, electricity grid conditions and market prices can be influenced.
Across the coverage, the emphasis is on the operational effect of extreme weather on cooling and the downstream implications for grid reliability and pricing during stress periods. While the magnitude over time is described as limited, all accounts point to a clear vulnerability during extreme heat events, when plants may not be able to run at full capacity.
