Gallery: Jellyfish Force Huge Nuclear Reactor to Shut Down in Sweden


One of the world’s biggest nuclear reactors was shut down last Sunday by an unlikely foe: jellyfish. Sweden’s Oskarshamn reactor was closed when tons of jellyfish clogged up the pipes that supply the reactor with fresh water. It’s a problem that may seem like an anomaly, but it has happened before and scientists suggest that it is likely to get worse as overfishing and poor water conditions eliminate native fish populations.

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  1. Ryan Mild October 5, 2013 at 5:06 pm

    I just watched a show with my daughter on YouTube by the history channel about this. It’s actually more common than one would think. The jelly population is exposing due to climate change. Scary source of energy we depend on.

  2. Donna Gilmore October 2, 2013 at 10:14 am

    Jelly fish have more backbone than our elected officials. Diablo Canyon in California was shut down more than once because of the sea salp. The plant isn’t needed for power in California, yet our elected officials continue to force ratepayers to live with this unnecessary risk. San Onofre nuclear plant in Southern California is permanently shut down due to SoCal Edison’s poorly designed steam generators. We haven’t had one blackout without the plant, but we did have a radiation leak because of the generators. Now we have to deal with the high burnup fuel nuclear waste that is over twice as radioactive and hot as low burnup fuel and has proved to be unstable in dry cask storage — even with the first 20 years. Learn more at

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