INFRA Signal 397
Jellyfish swarm forced EDF to shut three Gravelines reactors and reduce a fourth, taking 3.2 GW offline
↗
A massive influx of jellyfish blocked intake systems at Electricite de France's Gravelines nuclear plant, forcing three units to shut down and a fourth to reduce output during a summer heat wave.
Biological fouling of cooling water intakes is an operational risk that can take large generation assets offline with little warning, and warming waters may make such events more frequent. EDF had already spent hundreds of thousands of euros on prevention measures that failed to stop a repeat incident.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
A massive jellyfish influx forced EDF to shut three units at Gravelines and reduce output at a fourth, taking 3.2 gigawatts offline during a summer temperature surge.
EDF installed fixed cameras at intake canals and filter drum screens, and partnered with fishing and sea rescue organizations to monitor and trawl swarms before they reach the plant.
Scientists warn such events could become more common due to global warming, invasive species, habitat loss of predators, and over-fishing.
THE CLUSTER