29 mars 2014
Le réacteur était à 87 % de sa puissance quand la turbine est tombée. L’arrêt d’urgence se serait effectué normalement avec l’enclenchement des systèmes de protection du réacteur car le cœur était critique.
Type : BWR Mark 3 - Puissance : 3 898 MWth - Première divergence : 08/1982
Available in english only.
Event Number : 49972 - Facility : GRAND GULF - State : MS - Unit : [1] - RX Type : [1] GE-6 -
Event Date : 03/29/2014 - Event Time : 10:08 -
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Unit SCRAM Code RX CRIT Initial PWR Initial RX Mode Current PWR Current RX Mode 1 A/R Y 87 Power Operation 0 Hot Shutdown
Event Text
AUTOMATIC REACTOR SCRAM DUE TO A TURBINE TRIP
"Actuation of RPS with reactor critical. Reactor Scram occurred at 1008 [CDT] on 03/29/2014 from 87% CTP [core thermal power]. The cause of the Scram appears to be a Turbine Generator Trip.
"05-S-01-EP-2 RPV Control, 05-1-02-I-1 Reactor Scram ONEP and 05-1-02-l-2 Turbine Generator Trip ONEP were entered to mitigate the transient with all systems responding as designed. No loss of offsite or ESF [engineered safety feature] power occurred. No ECCS [emergency core cooling systems] initiation signals were reached and no ESF or Diesel Generator initiations occurred.
"All control rods are fully inserted. MSIVs [main steam isolation valve] remained open and no SRVs [safety relief valves] lifted. Currently, reactor water level is being maintained by the Condensate and Feedwater system in normal band and reactor pressure is being controlled via Main Turbine Bypass Valves to the main condenser. There are no challenges to Primary or Secondary Containment at this time."
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2014/20140331en.html
La boutique
Informez vous