ML19269C728

LER 79-008/03L-0 on 790109:during Surveillance Testing, Containment Recirculation Fan 1-1 Failed to Run.Cause Attributed to Buildup of non-conductive Film on Auxiliary Controller Contacts

ML19269C728
Person / Time
Site:	Davis Besse
Issue date:	02/05/1979
From:	Naylor R TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19269C723	List: ML19269C722 ML19269C728
References
LER-79-008-03L, LER-79-8-3L, NUDOCS 7902120131
Download: ML19269C728 (2)

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LICENSEE EVENT REPORT l l l l (PLEASE PRINT CR TYPE ALL REQUIRED lidFORMATION) g .CcraROLstOCK:

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7 5 (30 61 DOCKET NUMGER 63 63 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBAOLE CONSEQUENCES h fo l 2 ] [ On 1/9/79, during surveillance testing Containment Recirculation Fan 1-1 failed to runl o a l Attempts to reset the breaker and start the fan failed. This placed the unit in the j l o l 4 l l Action Statement of Technical Specification 3.6.4.2. This required the one inoperable l o c, Containment Recirculation System to be restored to an operable condition within 30 ]

IolcII days. There was no danger to the health and safety of the public or unit personnel. l o 7 [The standby Containment Recirculation Fan 1-2 was operational. (NP-33-79-08) g 0 8 l  !

7 8 9 80 SYSTE M CAUSE CAUSE COYP. VALVE CODE CODE SUaCODE COMPONENT COCE SUSCOCE SUSCODE o 9 lSlElh [ h d h lC K T l B l R l K lh l B lh [_Z_j h 7 8 9 to 31 12 13 18 19 20

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3/ 40 42 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h i o lThe connections, contacts and components for the controller were insnected. Although l l lij lno exact cause has been determined, the cause has been attributed to the buildup of a I i, ;7] lnon-conductive film on the auxiliary controller contacts. The contacts were cleaned. I i ,13 [ l The fan was satisfactorily tested and declared operable. The unit was removed from

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