5 mai 2018
La fuite était supérieure à 114 litres par minute à travers une vanne. Suite à ce problème, une perte de confinement pouvait advenir dans des conditions accidentelles. L’écoulement d’eau de service vers le refroidisseur de confinement 1B a été isolé.
Type : PWR - Puissance : 2 775 MWTh - Première divergence : 08/1977
Available in english only
Event Number : 53393
Facility : FARLEY - State : AL Unit : [1] - RX Type : [1] W-3-LP
Event Date : 05/08/2018 - Event Time : 00:00 [CDT]
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(ii)(A) - DEGRADED CONDITION Person (Organization) :
Initial PWR : 0 % Current PWR : 0 %
Event Text CONTAINMENT LEAK RATE GREATER THAN TECH SPEC
"On May 8, 2018 at 0139 Central Daylight Time, Farley Nuclear Plant Unit 1 declared containment inoperable due to total containment leak rate greater than technical specifications. The 1B containment cooler had seat leakage of approximately 30 gallons per minute from a service water drain valve.
"Though the containment cooler service water supply is not tested per the Appendix J program, a loss of the containment barrier is possible under accident conditions.
"The service water flow path to the 1B containment cooler has been isolated to exit the condition."
The licensee will notify the NRC resident inspector.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20180508en.html
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