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Nuclear Event – Manual Reactor Shutdown: River Bend Station, Unit 1, St. Francisville, Louisiana

2017/03/13

Nuclear Event – Nuclear Reactor Hot Shutdown

North America – USA | State of Louisiana, St. Francisville, River Bend Nuclear Power Station
Location: 30°45’24.0″N 91°20’00.0″W
Present Operational Age: ~31 years
Event: MANUAL REACTOR SCRAM – HOT SHUTDOWN

Emergency Class: NON EMERGENCY
10 CFR Section:  50.72(b)(2)(iv)(B) – RPS ACTUATION – CRITICAL

Nuclear Event in USA on Friday, 10 March, 2017 at 07:14 [CST].

MANUAL REACTOR SCRAM DUE TO CLOSURE OF THE MAIN TURBINE CONTROL VALVES

“At 0714 CST on March 10, 2017, with the unit in Mode 1 at approximately 17% power, a manual actuation of the reactor protection system (RPS) was initiated due to rising reactor pressure caused by the closure of the Main Turbine Control Valves (MTCV’s). The cause of the closure of the MTCV’s is under investigation.

“The unit is currently stable in Mode 3.

“All control rods inserted as expected; water level control is stable in the normal control band and reactor pressure is being maintained with steam line drains [aligned to the main condenser].

“The NRC Senior Resident Inspector has been notified.”

Source: NRC  Event Number: 52602

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