05000366/LER-1979-014-03, /03L-0 on 790127:during Cold Shutdown, Underfrequency Trip Setpoint Was Found at 54.4H for Motor Generator Set B Below Tech Spec Min.Caused by Erroneous Setting Due to pre-operational Test

/03L-0 on 790127:during Cold Shutdown, Underfrequency Trip Setpoint Was Found at 54.4H for Motor Generator Set B Below Tech Spec Min.Caused by Erroneous Setting Due to pre-operational Test

ML19261B306
Person / Time
Site:	Hatch
Issue date:	02/07/1979
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19261B300	List: 05000366/LER-1979-014, Forwards LER 79-014/03L-0 05000366/LER-1979-014-03, /03L-0 on 790127:during Cold Shutdown, Underfrequency Trip Setpoint Was Found at 54.4H for Motor Generator Set B Below Tech Spec Min.Caused by Erroneous Setting Due to pre-operational Test
References
LER-79-014-03L, LER-79-14-3L, NUDOCS 7902150293
Download: ML19261B306 (1)

LER-1979-014, /03L-0 on 790127:during Cold Shutdown, Underfrequency Trip Setpoint Was Found at 54.4H for Motor Generator Set B Below Tech Spec Min.Caused by Erroneous Setting Due to pre-operational Test

Event date:
Report date:
3661979014R03 - NRC Website

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g lWith the unit in cold shutdown while performing HNP-2-3456, RPS M-G Set overvoltaqe, l

g g underfrequency, and undervoltage FT&C, the underfrequency trip setpoint was found i

g [at 54.4HZ for RPS M-G set "B". The expected setpoint per HNP-2-3456 is 5810.5 HZ.

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g lThe Technical Specification limit is > 57 HZ (4.8.2.1.b.3). No significant avents g

g leccurred as a consequence. Reference similar LER 79-005.

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Q] system had caused it to be set to 54 HZ. The surveillance test, HNP-2-3456, contains I

2 [a setpoint more conservative than Tech. Soecs. No orocedure revision is necessarv.

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[3] l The setnoint was adiosted ner HNP-2-3456.

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