ML20005A069

LER 81-058/03L-0:on 810418,while in Mode 3,lower Containment High Temp Alarm Was Received in Control Room Indicating That Units C & D Feeder Breakers Tripped.Caused by Incorrectly Adjusted Unit D Magnetic Overload Switch.Breaker Replaced

ML20005A069
Person / Time
Site:	McGuire
Issue date:	05/18/1981
From:	Ouellette R DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20005A067	List: ML20005A066 ML20005A069
References
LER-81-058-03L, LER-81-58-3L, NUDOCS 8106290326
Download: ML20005A069 (1)

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[TTT1 i While in Mode 3,. initial fuel oading, a lower containment high ,

, temperature alarm was received in the Control Room. The feeder breakers EI for the containment ventilation air handlins; units C and D had i ro'Til I trioned. This ie in violation of T.S. 3.6.1.5 since the lower g I o I.1 I containment temperatiire exceeded 120 F. This is reportable per i 1o4:11 T.S. 6. 9.' l .13 (b) . Unit D was still capable of operation, therefore ,

ei the health and safety of the public were not affected. ,

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hbh@ f@ @ l1 @lCl @ l Njg l Llg [W lh"l,,0 causa oescaimca Ano ccaneenve Acnons gl The magnetic overload switc on Unit D breaker was adjusted ,

,,,,,, incorrectly and it could not be readily determined what caused the unit C breaker to trip. The Unit C breaker was reset and the unit D

, breaker was replaced. Preventative maintenance will be performed iis.i I on Unit D.

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