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Jellyfish Force Shutdown of Three Reactors at France's largest...

Three reactors at the Gravelines nuclear power plant in northern France were shut down late on Monday due to a massive ​swarm of jellyfish, triggering preventative measures put in place last year after the entire ⁠plant went offline, operator EDF said. Output at a fourth reactor was cut by half, leaving just one operating at full capacity. A sixth reactor was already offline for scheduled maintenance. "This situation has no impact on the safety …

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If the sector is serene, the high heats in Europe this summer, and again last week, are not without consequences for nuclear power stations. In France, several reactors have again been idled or stopped. EDF, moreover, had to face the arrival of many jellyfish at the Gravelines site.

·Issy-les-Moulineaux, France
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On Wednesday 13 August 2026, the French nuclear power station crossed an unprecedented threshold: 20.4 per cent of its installed capacity was unavailable for environmental reasons. Eight shut-down reactors, two other bridled reactors, all without plunged France into the dark. Behind this apparent paradox is a massive economic reality: EDF is planning €8.7 billion of investments by 2040 to adapt its installations to the new climatic constraints. …

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nuclear-news broke the news on Sunday, August 16, 2026.
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