20 mars 2017
Le réacteur était en cours de démarrage à environ 4 % de sa puissance quand le taux d’oscillations a dépassé les critères prescrits. L’arrêt d’urgence manuel a alors été engagé par les opérateurs. Des investigations sont menées pour déterminer la cause de ces oscillations.
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Type : Fukushima I (BWR-MARK 1) - Puissance : 1860 MWth - Première divergence 09/1969 -
Event Number : 52624
Facility : NINE MILE POINT
State : NY - Unit : [1] - RX Type : [1] GE-2 -
Event Date : 03/20/2017 - Event Time : 02:27 [EDT]
Emergency Class : NON EMERGENCY 10 CFR Section : 50.72(b)(2)(iv)(B) - RPS ACTUATION - CRITICAL
Initial PWR : 4 % Current PWR : 0 %
Event Text
MANUAL SCRAM DUE TO PRESSURE OSCILLATIONS
"On March 20, 2017 at 0227, Nine Mile Point Unit1 was manually scrammed due to pressure oscillations. The Unit was offline and reactor shutdown was in-progress at the time of the scram. The scram was inserted at approximately 4% reactor power when pressure oscillations occurred exceeding the procedurally required limit for pressure oscillations. The cause of the scram was due to Operators manually inserting the scram. The cause of the pressure oscillations is being investigated."
The licensee notified the NRC Resident Inspector.
Notified the R1DO (Gray).
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