Jellyfish swarm shuts reactors at Paluel nuclear site in France

A swarm of jellyfish forced the shutdown of one of the four reactors at France’s Paluel nuclear power plant for the second time within a month, reducing the plant’s output by 2.4 gigawatts. The jellyfish clogged the filters of the plant’s seawater pumping station, which is used to cool the reactors, prompting Electricité de France (EDF) to safely halt production unit No. 4 and reduce output from unit No. 3 as a precaution. Paluel, located in Normandy and drawing cooling water from the English Channel, is France’s second-largest nuclear facility with a total capacity of 5.2 gigawatts, supplying a significant portion of the country’s nuclear-generated electricity. This incident is part of a broader pattern affecting coastal nuclear plants that rely on seawater for cooling. Similar disruptions caused by jellyfish swarms have occurred at France’s Gravelines plant, Scotland’s Torness plant, and Japan’s Shimane plant. Scientists warn that such events may