ML19261C733

LER 79-013/03L-0 on 790227:B1F Sequencer Found in Test Mode, Rendering 1-2A Diesel Generator Inoperable.Caused by Faulty Switch Mechanism.Sequencer Repaired

ML19261C733
Person / Time
Site:	Farley
Issue date:	03/22/1979
From:	Hairston W ALABAMA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19261C730	List: ML19261C729 ML19261C733
References
LER-79-013-03L, LER-79-13-3L, NUDOCS 7903280318
Download: ML19261C733 (1)

Text

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h o 2 lAt 1125 on 2/22/79, an Assistant Plant Operator discovered that the BlF sequencer was o 3 lin the test mode thereby rendering the 1-2A D/G inoperable. (The BlF sequencer had l o 4 lbeen tested satisfactorily on 2/21/79.) The 1B D/G was out of service for preventativq o 3 lmaintenanfe. Therefore, both ' sets o f D/G required by Tech. Spec. 3.8.1. lb were not l o s lavailable. Tech. Spec. 3.3.1.ld action statement requirements were met. 4he 1-2A l o 7 l D/G and 1B D/G were returned to an operable status at 1200 and 2212 respectively on l ais l2/22/79. The health and safety of the general public were not affected. [

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['jh 41 i lYlh lAlh lGl0l8l0lh 42 43 44 47 CAUSE DESCRIPTION AND COP: EC IVE ACTIONS h i o lThe BlF sequencer being in the test mode is attributable to a faultv switch mechanism l l1 lt l [which would allow the sequencer to change modes when the sequencer cabinet m s bumed. I

,  ;, lThe BlF sequencer was returned to normal and repairs were made to orevent it from I

, 3 l inadvertently going to the test mode.

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