Due to an intense heatwave across Europe, several nuclear power plants in Switzerland and France have reduced output or shut down. These plants rely on river or sea water for cooling, but high temperatures have made this process difficult and environmentally risky. Releasing overly hot water back into rivers threatens local biodiversity. In Switzerland, Axpo shut down one reactor at the Beznau nuclear plant and reduced another to 50% capacity, as the River Aare reached 25°C. Although Switzerland plans to phase out nuclear energy by 2033, plants may operate if deemed safe.
In France, EDF shut down the Golfech plant amid fears the local river could exceed 28°C. Output was also reduced at Blayais and Bugey plants due to warming river waters. France relies on nuclear energy for 65% of its electricity and operates 57 reactors. Despite heat-related curtailments, the French energy grid remains stable. The country continues to export electricity and meets domestic demand. However, experts warn that rising global temperatures will increase pressure on energy systems during heatwaves, as air conditioning and cooling needs grow.
Roberto Colle
