Overview

• Four reactors shut down automatically between late Sunday and early Monday after jellyfish clogged their cooling filters, and the two remaining units were offline for scheduled maintenance.
• EDF said the blockage occurred in non-nuclear pumping stations and would not cause a power shortage or harm safety and the environment.
• Gravelines, Western Europe’s largest nuclear site, supplies about 5.4 gigawatts of power by drawing cooling water from a North Sea canal.
• Experts link the surge in jellyfish blooms to rising sea temperatures, invasive species and ecosystem shifts driven by overfishing and shipping.
• Similar incidents at plants worldwide have spurred calls for improved intake screening and early-warning tools to prevent repeat shutdowns.