Rivers too hot or dry, jellyfish… Nuclear power revival already hindered by global warming

France's ambitious plans to revive its nuclear power sector are already facing significant challenges due to the escalating impacts of climate change, particularly rising water temperatures and drought.

In July and August, the French energy company EDF was compelled to shut down multiple nuclear reactors. This was a direct consequence of water temperatures in rivers and coastal areas exceeding permissible limits for cooling the reactors. This environmental "unavailability" has led to a substantial reduction in nuclear power output, affecting as much as 20% of the country's total generating capacity at times.

The situation raises serious questions about the long-term resilience of France's atomic energy strategy in the face of a warming planet. While nuclear power is promoted as a low-carbon energy source, its operational reliance on significant water resources for cooling makes it vulnerable to climate change-induced water scarcity and thermal pollution.

This vulnerability could complicate France's energy transition goals and its commitment to energy independence through nuclear power. The need to adapt existing infrastructure or develop new cooling technologies may add significant costs and delays to the nuclear renaissance.