19 octobre 2014
Le 19 octobre, l’unité 1 à 19 % de sa puissance nominale a été arrêtée pour un rechargement de combustible programmé. Les pompes d’alimentation auxiliaire en eau n’étant pas en service, le niveau d’eau des générateurs de vapeur a atteint 14 %. Le système d’alimentation en eau auxiliaire d’urgence de sûreté s’est alors enclenché, ce qui a permis de rétablir le niveau d’eau dans les générateurs de vapeur .
Type : PWR - Puissance : 3 459 MWth - Première divergence : 12/1976
Available in english only.
Event Number : 50550
Facility : SALEM - 1 State : NJ
Unit : [1] RX Type : [1] W-4-LP
Event Date : 10/19/2014 - Event Time : 20:51
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Initial PWR : 19 % Current PWR : 0 %
Event Text
MANUAL REACTOR TRIP RESULTING IN AUX FEEDWATER ACTUATION
"This is an 8-hour notification being made to report that a valid ESF [emergency safety features] auxiliary feed water system actuation occurred. Salem Unit 1 was in mode 1 at 19% reactor power and executed a planned manual reactor trip to begin a scheduled refueling outage (1R23). The 11, 12, and 13 AFW [auxiliary feedwater] pumps were not in service prior to the reactor trip and as a result, narrow range levels in 12, 13, and 14 steam generators reached 14% before recovering. This resulted in a valid ESF actuation for low steam generator water level. Steam generator water levels were restored to normal post trip values as part of the procedurally directed response to a reactor trip.
"All safety related equipment was operational before the reactor trip and AFW actuation and responded as required. There were no equipment failures that contributed to this event. There were no personnel injuries as a result of’ this event.
"The NRC Resident Inspector has been informed."
A transformer alarm caused the operators to trip the reactor prior to reaching the step in the procedure to start the AFW pumps.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2014/20141021en.html