05000366/LER-1979-002-03, /03L-0 on 791231:in Cold Shutdown While Performing HNP-2-3456,overvoltage Trip Setpoint for Reactor Protection Sys Motor Generator Set B Was Found at 133.5 Volts Alternating Current.Caused by Setpoint Drift

/03L-0 on 791231:in Cold Shutdown While Performing HNP-2-3456,overvoltage Trip Setpoint for Reactor Protection Sys Motor Generator Set B Was Found at 133.5 Volts Alternating Current.Caused by Setpoint Drift

ML19263B587
Person / Time
Site:	Hatch
Issue date:	01/12/1979
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19263B586	List: 05000366/LER-1979-002, Forwards LER 79-002/03L-0 05000366/LER-1979-002-03, /03L-0 on 791231:in Cold Shutdown While Performing HNP-2-3456,overvoltage Trip Setpoint for Reactor Protection Sys Motor Generator Set B Was Found at 133.5 Volts Alternating Current.Caused by Setpoint Drift
References
LER-79-002-03L, LER-79-2-3L, NUDOCS 7901220055
Download: ML19263B587 (1)

LER-1979-002, /03L-0 on 791231:in Cold Shutdown While Performing HNP-2-3456,overvoltage Trip Setpoint for Reactor Protection Sys Motor Generator Set B Was Found at 133.5 Volts Alternating Current.Caused by Setpoint Drift

Event date:
Report date:
3661979002R03 - NRC Website

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(, 3 0 0 > !. T ?.U'.'d E H EVENT DESCRIPTION AND PROBAGLE CONSEGUENCES h lWith the unit in cold shutdcun '. nile perf orming H:;P-2-3456, RPS M-G set overvoltage, i

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j underfrequency, and undervoltage FTSC, the overvoltage trip setpoint for RPS M-G l

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[ set "B" was found at 133.5 VAC. The expected setpoint per Hi:P-2-3456 is 130 t 1 VAC.

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The Technical Specification limit is $132 VAC (4.8.2.1.2. b.1). l10 significant events in s

[cccurred as a consequence. There are no similar occurrences.

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