Massive jellyfish invasion shuts down French nuclear reactors

WorldEnvironment
12 Aug 2026 • 6:00 PM MYT
The Independent
The Independent

The world’s most free-thinking newspaper

Massive jellyfish invasion shuts down French nuclear reactors

  • A massive swarm of jellyfish clogged cooling pumps at Gravelines power station in northern France, leaving only one of its six nuclear reactors operating at full capacity.
  • EDF said that an influx of “several tens of tons” of jellyfish forced three 900-megawatt reactors offline and halved the output of a fourth.
  • EDF said in a statement: “This situation has no impact on the safety of the facilities, the safety of our personnel, or the environment.”
  • Fishing vessels are now taking part in “preventive fishing operations”, including catching the jellyfish with trawlers and releasing them offshore.
  • The facility suffered an almost identical disruption last year, as experts warn that rising sea temperatures are creating favourable conditions for jellyfish making swarms along the coast increasingly common.

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