3 octobre 2013
Découverte d’une fuite sur un circuit chargé d’assurer la sûreté du réacteur... Le circuit d’injection de liquide primaire haute pression a été découvert incapable d’assurer sa fonction : ce circuit est prévu pour tenter de compenser le niveau d’eau en cas de fuite primaire à la puissance nominale de fonctionnement du réacteur.
Première divergence : avril 1972 - Puissance 2 597 MWth : - Type BWR Mark I (= Fukushima I)
Available in english only.
Event Number : 49407 - Facility : QUAD CITIES - State : IL Unit : [2] - RX Type : [1] GE-3,[2] GE-3 -
Event Date : 10/03/2013 - Event Time : 20:45 -
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(v)(D) - ACCIDENT MITIGATION
Initial PWR : 100% Current PWR : 100 %
Event Text
UNIT 2 HIGH PRESSURE COOLANT INJECTION (HPCI) INOPERABLE DUE TO DRAIN LINE LEAK
"On October 3, 2013, at 2045 [CDT] hours, a defect (pinhole through-wall leak) was identified on the drain line for the LS 2-2365, HPCI TURBINE INLET DRAIN POT LEVEL SWITCH. The defect was identified during investigation of leakage near LS 2-2365. The LS 2-2365, HPCI TURBINE INLET DRAIN POT LEVEL SWITCH, is provided to detect a failure of the HPCI steam trap during standby line-up. The location of the defect, is in Class 2 Safety related piping. HPCI is a single train safety system and this notification is being made in accordance with 10CFR50.72(b)(3)(v)(D). The instrument isolations for LS 2-2365 have been close and the leak has been isolated."
There is no increase to plant risk and RCIC (Reactor Core Isolation Cooling) is available.
The licensee will inform the NRC Resident Inspector.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2013/20131004en.html