27 juillet 2014
Lors d’un test avec le réacteur à 100 % de sa puissance et donc le cœur critique, une alarme s’est déclenchée dans la salle de contrôle suite à la baisse du niveau de vapeur dans le générateur de vapeur. L’arrêt s’est effectué correctement. Une équipe cherche la cause de la perte de la pompe principale et détermine les critères de redémarrage ainsi que l’heure prévue pour celui-ci.
Type : PWR - Puissance : 3 625 MWth - Première divergence : 09/1987
Available in english only.
Event Number : 50314
Facility : VOGTLE - State : GA - Unit : [1] - RX Type : [1] W-4-LP -
Event Date : 07/27/2014 - Event Time : 14:09
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 : 100 %
Event Text
MANUAL REACTOR TRIP DUE TO LOSS OF MAIN FEED PUMP DURING TESTING
"VEGP [Vogtle Electric Generation Plant] Unit One was at 100 percent power, with a Main Feed Pump (MFP) Turbine A trip mechanism test in-progress, when MFP A Trip alarm was received in the Main Control Room. Control Room crew identified MFP A speed and steam generator levels lowering and initiated a manual reactor trip. All control rods fully inserted and nothing unusual was noted. Auxiliary feed water and feedwater isolation actuated as expected. The unit is currently stable in MODE 3 at normal operating temperature and pressure. A forced outage response team has been formed to determine the cause of the MFP A trip and determine restart criteria and time of restart."
The unit is in a normal shutdown electric plant lineup. No effect on Unit 2.
The licensee notified the NRC Resident Inspector.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2014/20140728en.html#en50314