Jellyfish Clog Cooling Pumps, Shutting Down Three Reactors at French Nuclear Plant
A significant surge of jellyfish obstructed the cooling pumps at the Gravelines nuclear power station located near Dunkirk, France, prompting energy company EDF to halt operations at three reactors on Monday and cut the output of a fourth by 50%. Currently, only one reactor is functioning at full capacity, while a sixth was already out of service for planned maintenance. EDF stated that this situation does not compromise the safety of the facilities, staff, or the environment. This event contributes to a challenging year for French nuclear energy, which has faced numerous disruptions from heatwaves and droughts, causing reactor shutdowns in June and July. Prior to the latest shutdowns, France experienced a 15.6% decline in nuclear power generation, as reported by Agence France-Presse using EDF data since 2015. The Gravelines facility is among France's largest nuclear plants, and the jellyfish incident underscores the susceptibility of coastal nuclear sites to marine life blooms, intensified by rising water temperatures.
Key facts
- Three reactors at Gravelines nuclear power plant were shut down on Monday due to jellyfish clogging cooling pumps.
- Output at a fourth reactor was reduced by half, leaving only one reactor at full capacity.
- A sixth reactor was already offline for scheduled maintenance.
- EDF stated the situation has no impact on safety of facilities, personnel, or the environment.
- France has experienced nuclear power disruptions due to heatwaves and droughts, with shutdowns in June and July.
- On Sunday, France recorded a 15.6% shortfall in nuclear power production, per AFP calculations based on EDF data since 2015.
- The Gravelines plant is located near Dunkirk, France.
- The jellyfish influx is a marine life event affecting cooling systems.
Entities
Institutions
- EDF
- Gravelines nuclear power plant
- Agence France-Presse
Locations
- France
- Dunkirk
- Gravelines