20 novembre 2014
La fuite de liquide de refroidissement primaire, via le ventilateur, s’élevait à un niveau de 20 à 30 gouttes par heure. Les dispositions ont été prises pour isoler rapidement la fuite.
Type : PWR - Puissance : 1 677 MWth - Première divergence : 12/1973
Available in english only.
Event Number : 50630
Facility : PRAIRIE ISLAND - State : MN
Unit : [1] - RX Type : [1] W-2-LP
Event Date : 11/20/2014 - Event Time : 10:22
Last Update Date : 11/20/2014 Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(v)(C) - POT UNCNTRL RAD REL
Initial PWR : 0 % Current PWR : 0 %
Event Text
CONTAINMENT DECLARED INOPERABLE DUE TO CONTAINMENT FAN COIL LEAK
"At 1022 CST on November 20, 2014, a cooling water leak of approximately 20 to 30 drops per minute was identified on the 14 Containment Fan Coil Unit NW side lower face gasket. Unit 1 Containment was declared inoperable, which required entry into Technical Specifications (TS) LCO 3.6.1 Condition A, containment inoperable, applicable in MODES 1, 2, 3, and 4. Immediate actions were taken to isolate the Fan Coil Unit within 1 hour from the initial identification of the leak. 14 Containment Fan Coil Unit was isolated and Containment was declared operable and TS 3.6.1 Condition A was exited at 1109 CST. A Work Request (WR) was initiated and 14 Containment Fan Coil Unit has been restored to an operable condition.
"This condition is reportable under 10 CFR 50.72(b)(3)(v)(C) as an event or condition that could have prevented fulfillment of the safety function of structures or systems that are needed to control the release of radioactive material.
"The plant remains in a safe condition and there was no effect to the health and safety of the public.
"The licensee has notified the NRC Resident Inspector."
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2014/20141121en.html#en50630
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