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Jellyfish Swarm Forces EON to Shut Sweden’s Biggest Reactor

EON SE shut down Sweden’s biggest nuclear reactor after a swarm of jellyfish blocked the cooling water inlet at the reactor on the Baltic coast.

It’s the first time the 1,400 megawatt Oskarshamn-3 unit has been closed by jellyfish, Anders Oesterberg, a spokesman for EON, said by e-mail today. The reactor, which makes up 5 percent of Sweden’s power, is scheduled to restart tomorrow and reach full power Oct. 3, EON said in a Nord Pool Spot AS filing.