25 avril 2012
La centrale nucléaire de Diablo Canyon a été mise à l’arrêt à cause de petites créatures similaires à des méduses. Ces créatures marines en grand nombre ont colmaté les grilles d’entrée d’eau de mer de la centrale nucléaire, la privant de son refroidissement. Le système auxiliaire de refroidissement a pris le relais. La perte de source froide est un des éléments les plus redoutés par les opérateurs des centrales nucléaires.
Available in english only.
Press release issued for shutdown of unit 2 due to salp influx
Facility : DIABLO CANYON
Unit : [2]
Event Date : 04/25/2012
Event Time : 22:27 [PDT]
Emergency Class : NON EMERGENCY
"On April 25, 2012, at 2227 PDT, Diablo Canyon Power Plant (DCPP) U2 was manually taken offline and the reactor shut down due to an influx of sea salp - a small, jellyfish-like organism - in the intake structure. Operators manually started the auxiliary feedwater pumps in accordance with the plant operating procedures.
"PG&E will not restart Unit 2 until conditions improve at the intake structure. As previously announced, Unit 1 was safely shut down for a planned refueling and maintenance outage.
"All systems operated as designed and no unexpected equipment performance issues were noted.
"The licensee notified the NRC Resident Inspector."
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2012/20120427en.html
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