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Nuclear Event – Automatic Reactor Trip: Fort Calhoun Nuclear Generating Station, Nebraska

2016/06/23

Potential Technological Hazard – Nuclear Reactor Shutdown

North America – USA | State of Nebraska, Fort Calhoun Nuclear Generating Station
Location: 41°31’13.0″N 96°04’38.0″W
Present Operational Age: ~43 years
Event:  RPS ACTUATION – CRITICAL/AUTOMATIC REACTOR TRIP

Nuclear Event in USA on Wednesday, 22 June, 2016 at 08:41 [CDT]

AUTOMATIC REACTOR TRIP DUE TO TURBINE TRIP

“At 0841 [CDT] an automatic turbine trip occurred, resulting in an automatic reactor protective system (RPS) actuation due to loss of turbine load. The source of the turbine trip was from the distributed control system (DCS) and is being investigated via a root cause analysis. This was an uncomplicated trip, all systems responded as expected post trip, and the reactor trip recovery procedure was entered at 0852 [CDT].”

The plant is stable in Mode 3 with a normal electrical line up and decay heat removal via steam dumps to the condenser.

The NRC Resident Inspector has been notified.

Source: NRC  Event Number: 52033

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