The Swedish operators of one of the largest nuclear reactors in the world are prepping to restart the facility after having to shut it down due to a large swarm of jellyfish in Oskarshamn. The Huffington Post reported on Oct. 1, 2013, that tons of jellyfish clustered together to force the shutdown in southeastern Sweden and marine biologists say this could become more common over time.
Operators at the Oskarshamn nuclear plant were freaking out on Sunday due to large waves of jellyfish clogging the pipes that bring in cool water. That water is used to cool down the turbines in the plant.
The species of jellyfish that caused this past weekend's nuclear shutdown in Oskarshamn are known as the common moon jellyfish.
As of Tuesday, the pipes were cleaned out and the jellyfish were gone as engineers prepared to restart the reactor.
Reports state that jellyfish are not a new problem for nuclear power plants and not just in Oskarshamn. In 2012, California-based Diablo Canyon facility had to shut down reactor two after a lot of sea salp - a gelatinous, jellyfish-like organism - clogged the intake pipes.
The same ordeal happened in Oskarshamn back in 2005 as jellyfish suddenly appeared by the thousands.
"It's true that there seems to be more and more of these extreme cases of blooming jellyfish," said Lene Moller, a researcher at the Swedish Institute for the Marine Environment. "But it's very difficult to say if there are more jellyfish, because there is no historical data."