Massive jellyfish swarm forces shutdown of 3 reactors at Gravelines nuclear plant in FranceAKIPRESS.COM - Three of the six nuclear reactors at France's largest nuclear power plant, Gravelines, have been shut down following a massive influx of jellyfish into its cooling systems, according to plant operator EDF. The units were halted after filtering drums in the pumping stations became clogged by jellyfish drawn with North Sea water used for cooling. A fourth reactor's output was reduced to 50% as a precautionary measure, while a fifth was already offline for scheduled maintenance. This is not the first occurrence at the plant; one year ago, Gravelines was forced to shut down entirely due to a similar jellyfish swarm. Experts attribute the surge in jellyfish populations to climate change and warming waters in the North Sea.