12 mai 2015
Le système de protection du réacteur s’est enclenché. L’arrêt automatique du réacteur n° a démarré à 4h30 et se serait correctement effectué. Il n’y a pas eu de fuite connue du primaire vers le secondaire.
Type : PWR - Puissance : 2 300 MWth - Première divergence : 06/1973
Available in english only.
Event Number : 51065
Facility : TURKEY POINT - State : FL - Unit : [4] - RX Type : [4] W-3-LP -
Event Date : 05/12/2015 - Event Time : 04:30
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 : 81 %
Current PWR : 0 %
Event Text
REACTOR TRIP DUE TO MAIN GENERATOR DIFFERENTIAL TRIP
"This is an non-emergency notification to the NRC [Headquarters] Operations Center in accordance with 10 CFR 50.72(b)(2)(iv)(B) for a valid actuation of the reactor protection system (RPS) (four hour notification) and 10 CFR 50.72(b)(3)(iv)(A) for a valid Engineered Safeguards (ESF) actuation (eight hour notification) due to auxiliary feedwater (AFW) initiation.
"On 5/12/15 at 0430 EDT, Unit 4 experienced an automatic reactor trip due to Generator Differential Trip. Investigation is underway to determine the cause. Auxiliary feedwater automatically initiated as expected. All systems operated correctly in response to the reactor trip. Unit 4 is currently in Mode 3 and stable."
All control rods fully inserted. Normal offsite power is available with decay heat is being removed by the atmospheric steam dumps. There is no known primary to secondary reactor coolant system leakage.
The licensee has notified the NRC Resident Inspector.
https://www.nrc.gov/reading-rm/doc-collections/event-status/event/2015/20150513en.html#en51065
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