Jellyfish Swarm Forces Shutdown of French Nuclear Reactors Amid Heatwave

France is grappling with a dual crisis as an extreme heatwave coincides with a significant jellyfish infestation, forcing the partial or complete shutdown of several nuclear power plants. The unusual proliferation of jellyfish in the unusually warm Atlantic waters has led to them clogging the intake filters essential for cooling the reactors.

Three reactors at the Gravelines nuclear power plant near Calais were completely shut down earlier this week due to the jellyfish blocking the filters. A fourth reactor at the same facility is operating at reduced capacity. This marine menace adds another layer of complexity to the challenges already posed by the ongoing heatwave and drought conditions affecting the country's energy sector.

The French state-owned energy company EDF has been struggling with the heatwave's impact on its nuclear fleet. Low water levels in rivers, used for cooling, have already forced the shutdown of reactors at four other sites, resulting in a loss of more than 15 percent of the nation's nuclear power output. This heat-related reduction is reportedly the largest in the history of France's nuclear park.

Adding to the concerns, Météo France forecasts continued dry weather and a fifth heatwave since June. EDF acknowledges that low water levels may necessitate further production cutbacks at other plants. However, the company asserts that its nuclear facilities are robust and that it is well-prepared to manage the situation. The combination of extreme heat and the unexpected jellyfish plague presents a significant challenge to France's energy stability and could contribute to rising electricity prices.