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Nuclear Event – Manual Reactor SCRAM (Hot Shutdown): Nine Mile Point Nuclear Station, Unit 1, New York

2017/03/20

North America – USA | State of New York,  Nine Mile Point Nuclear Station, Unit 1
Location: 43°31’15.0″N 76°24’25.0″W
Present Operational Age: ~43 years
Event: MANUAL SCRAM
Emergency Class: NON EMERGENCY
10 CFR Section:
50.72(b)(2)(iv)(B) – RPS ACTUATION – CRITICAL

Nuclear Event in USA on Monday, 20 March, 2017 at 02:27 [EDT].

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).

Source: NRC  Event Number:  52624

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