05000346/LER-1979-008-03, /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

/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: 05000346/LER-1979-008, Forwards LER 79-008/03L-0 05000346/LER-1979-008-03, /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 ML19269C722
References
LER-79-008-03L, LER-79-8-3L, NUDOCS 7902120131
Download: ML19269C728 (2)

LER-1979-008, /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

Event date:
Report date:
3461979008R03 - NRC Website

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LICENSEE EVENT REPORT l

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

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8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TY PE JO 57 C A T 58 CON'T l0l1l Eny L l@ 0 l 5 l 0 l-10 l 3 l 4 l 6 l@l 0 1 l 0 l 9 l 7 l 9 lhl0 l2 l0 l5 7

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(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 l ttempts to reset the breaker and start the fan failed. This placed the unit in the j

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a 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

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d IolcII ays.

There was no danger to the health and safety of the public or unit personnel.

l [The standby Containment Recirculation Fan 1-2 was operational.

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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 pi l4 ; lthe Action Statement of Technical Specification 3.6.4.2.

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8 9 10 11 44 45 80 PERSONNE L EXPOSURES f

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NUVRE R 101010 l@l NA l

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