3 janvier 2019
Suite à ce mouvement intempestif de la vanne, le réacteur a été arrêté manuellement. Les barres de contrôle se sont insérées correctement dans le cœur et le système auxiliaire d’injection de liquide de refroidissement s’est activé suite à l’atteinte d’un niveau d’eau bas dans les générateurs de vapeur. La chaleur du cœur est retirée par les vannes de décharge de vapeur à l’atmosphère.
Type : PWR - Puissance : 2 565 MWTh - Première divergence : 05/1971
Available in english only
Event Number : 53813
Facility : PALISADES - State : MI
Unit : [1] - RX Type : [1] CE
Event Date : 01/03/2019 - Event Time : 00:00 [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 : 85 % Curent PWR : 0 %
Event Text
REACTOR TRIP DUE TO CYCLING OF TURBINE GOVERNOR VALVE
"At 2028 [EST] on January 3, 2019, with the reactor at 85% power, the reactor was manually tripped due to cycling of Turbine Governor Valve #4. The trip was uncomplicated with all systems responding normally following the trip. Investigation of the cause of the valve cycling is ongoing.
"All full-length control rods inserted fully. Auxiliary Feedwater System actuated as designed in response to low steam generator water levels. Operations stabilized the plant in Mode 3 (hot standby). Decay heat is being removed by atmospheric dump valves.
"This condition has no impact to the health and safety of the public.
"The licensee notified the NRC Senior Resident Inspector.
"This event is being reported pursuant to 10 CFR 50.72(b)(2)(iv)(B) and 10 CFR 50.72(b)(3)(iv)(A)."
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2019/20190104en.html