20 mars 2013
Le 20 mars 2013, à 14h47, une fuite d’huile d’environ un demi-litre par minute a été repérée sur la turbine d’injection du liquide de refroidissement haute pression. Cette fuite aurait empêché la réalisation de l’injection de sécurité en cas de besoin. La pompe a été réparée le 21 mars 2013 à 15h10.
1ère divergence : décembre 1984 - BWR Mark 2
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Facility : LIMERICK - State : PA - Unit : [1] RX Type : [1] GE-4
Event Date : 03/20/2013 - Event Time : 14:47
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Initial PWR : 100% Current PWR : 100%
HIGH PRESSURE COOLANT INJECTION (HPCI) TURBINE OIL LEAK
"After securing the Unit 1 HPCI turbine from service following a planned pump, valve, and flow surveillance test an oil leak of approximately 1 pint per minute developed. The oil leak was stopped by securing the auxiliary oil pump for the HPCI system.
"There was no loss of oil pressure while the HPCI turbine was operating. This issue has caused the Unit 1 HPCI system to be declared inoperable and unavailable. Per LGS [Limerick Generating Station] Unit 1 Technical Specifications section 3.5.1, the HPCI system must be restored to operable status within 14 days.
"The cause of the oil leak is being investigated."
The licensee notified the NRC Resident Inspector.
* * * UPDATE FROM DANIEL WILLIAMSON TO DONALD NORWOOD AT 1510 EDT ON MARCH 21, 2013 * * *
"UNIT 1 HPCI has been restored to operable status following repairs and post-maintenance testing at 1300 EDT on March 21, 2013."
The licensee changed the reporting requirement from 10CFR50.72(b)(3)(ii)(A) to 10CFR50.72(b)(3)(v((D).
The licensee will notify the NRC Resident Inspector. Notified R1DO (Trapp).
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2013/20130322en.html
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