16 février 2018
C’est lors de l’ouverture des disjoncteurs d’arrêt du réacteur n°1 pour réaliser un test du système statique de protection que ce dernier est tombé. L’arrêt se serait effectué sans problème avec un déroulé normal des opérations. Les pompes d’alimentation auxiliaires ont été démarré manuellement. L’alimentation auixiliare en eau a démarrré automatiquement sur un niveau bas de vapeur de générateur de vapeur. La chaleur résiduelle du coeur est évacuée par le condenseur.
Type : PWR - Puissance : 3 411 MWth - Première divergence : 8 / 1981 -
Available in english only
Event Number : 53217
Facility : MCGUIRE - State : NC
Unit : [1] - RX Type : [1] W-4-LP
Event Date : 02/16/2018 - Event Time : 10:14 [EST]
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL 50.72(b)(3)(iv)(A) - VALID SPECIF SYS ACTUATION
Initial PWR : 100 % Current PWR : 0 %
Event Text
AUTOMATIC REACTOR TRIP DURING SOLID STATE PROTECTION SYSTEM TESTING
"At 1014 [EST] hours on 2/16/18, with Unit 1 in Mode 1 at approximately 100 percent power, the reactor automatically tripped when the Reactor Trip Breakers opened during Train B Solid State Protection System (SSPS) testing. The trip was uncomplicated with all systems responding normally post-trip. Operations manually started the motor driven auxiliary feedwater pumps. The turbine driven auxiliary feedwater pump (TDCAP) auto-started on low steam generator level. A Feedwater Isolation occurred as designed due to the Reactor Trip and Lo Tave condition. Operations stabilized the plant. Decay heat is being removed by the condenser. Unit 2 is not affected.
"Due to the Reactor Protection System actuation while critical, actuation of the TDCAP and motor driven auxiliary feedwater pumps along with the Feedwater Isolation, this event is being reported as a four-hour, non-emergency notification per 10 CFR 50.72(b)(2)(iv)(B) and an 8 hour non-emergency notification per 10 CFR 50.72(b)(3)(iv)(A).
"There was no impact on the health and safety of the public or plant personnel. The NRC Resident Inspector has been notified. "
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2018/20180220en.html