A mass of jellyfish proved an unlikely thorn in the side of the Japanese nuclear industry this week when they choked a pipe which feeds cooling water into a coastal plant.
The output from the Hamaoka reactors was slashed by 30 to 40% after the cooling system automatically shut down, returning to full power about three hours later once workers had cleared the jellyfish blockage.
This was the first time jellyfish have affected power generation in Japan.
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