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Nuclear Event – Automatic Reactor trip: Salem Nuclear Power Plant, Unit 2, New Jersey

2016/06/29

Nuclear Event – Reactor Trip

North America – USA | State of New Jersey,  Lower Alloways Creek Township, Salem Nuclear Power Plant, Unit 2
Location: 39°27’46.0″N 75°32’08.0″W
Present Operational Age: ~31 years
Event: RPS ACTUATION – CRITICAL/VALID SPECIF SYS ACTUATION

Nuclear Event in USA on Tuesday, 28 June, 2016 at 04:23 [EDT].

AUTOMATIC REACTOR TRIP DUE TO MAIN TURBINE TRIP

“This 4 and 8 hour notification is being made to report that Salem Unit 2 suffered an unplanned automatic reactor trip and subsequent automatic auxiliary feedwater system actuation. The trip was initiated due to a Main Turbine Trip above P-9 (49% power). The Main Turbine trip was caused by a Main Generator Protection signal.

“Salem unit 2 is currently stable in Mode 3. Reactor coolant system pressure is 2235 psig and Reactor Coolant System temperature is 547 F with decay heat removal via the main steam dump and auxiliary feedwater systems. Unit 2 has no active shutdown tech spec action statements in effect. All control rods [fully] inserted on the reactor trip. All ECCS [Emergency Core Cooling System] and ESF [Emergency Safety Features] systems functioned as expected.

“No safety related equipment or major secondary equipment was tagged for maintenance prior to this event. No personnel were injured during this event.”

The main generator protection signal was either a ground fault or a differential current trip. The plant is in its normal shutdown electrical lineup. No safeties or relief valves lifted during this event.

Unit 1 is defueled and was not affected by this event.

The licensee notified the NRC Resident Inspector and will notify the Lower Alloways Creek Township.

Source: NRC Event Number: 52048
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Previous Events

Nuclear Event in USA on Thursday, 04 February, 2016 at 11:21 [EST]. AUTOMATIC REACTOR TRIP DUE TO MAIN TURBINE TRIP – UNIT 2

Nuclear Event in USA on Monday, 23 November, 2015 at 21:48 [EST]. UNUSUAL EVENT DECLARED DUE TO REACTOR COOLANT SYSTEM LEAKAGE  – UNIT 2

Nuclear Event in USA on Wednesday, 05 August, 2015 at 15:38 [EDT].  AUTOMATIC REACTOR TRIP ON LOW REACTOR COOLANT FLOW – UNIT 2

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