Two reactors of the Hanul Nuclear Power Plant in South Korea had to be shut down on Tuesday due to an invasion of sea salps. The gelatinous creatures that look like jellyfish have blocked water systems used to cool reactors No. 1 and No. 2 for the second time in three weeks, leaving the country without 1.9 gigawatts of energy generation.
"We can't say yet if the surge in salps is due to the changing climate or other factors", said Youn Seok-hyun, a research scientist at the National Institute of Fisheries Science. "It should be regarded as a temporary phenomenon unless we see a continuous increase over the next decade".
The previous shutdown of the same two reactors occurred in March for the same reason and lasted for over a week, costing Seoul millions of dollars, as it forces offline almost 10 percent of the nation's overall nuclear power capacity.