ML20085E576

LER ER-76-009:on 760419,left Channel Relay SP7 Showed Intermittent Operation During Containment Spray Sys Testing. Causing by Dirty Contacts.Relay Contacts Cleaned

ML20085E576
Person / Time
Site:	Palisades
Issue date:	05/14/1976
From:	Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
LER-ER-76-009, LER-ER-76-9, NUDOCS 8308150374
Download: ML20085E576 (2)

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EVENT DESCRFTION

@ lDuring testing of the containment spray system the left channel relay (No SP7.

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@ l Contacts h, 6 and 7) showed intermittent oeeration. The redundant sorw system l

7 89 80 3[ l tested satisfactorily. The relay contacts were cleaned and the retest was satis-l i

7 89 80 SE Ifactorv. Dust covers vill be installed to enclose these relays.

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COMPONENT CODE VOLATBN E l SI B l L!.1 IIl NI SI Tl R lUI W

lCl 3l 6l 0l (N,j 7 89 10 11 12 17 43 44 47 48 CAUSE OESCRIPTION gg lThe most likely cause of this problem is considered to be dirty contacts. The l

7 89 80 3@ l relay was a Tyre FM, Cat #5U10, Bulletin 7305 l

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Office of Inspection Enforcement

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Region III US Nuclear Regulatory Cc= mission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50 255, LICENSE DPR PALISADES PLANT - ER-76 CONTAIUMENT SFRAY Attached is a reportable occurrence which relates to the Palisades Plant. This occurrence has been classified as a condition leading to operation in a degraded mode permitted by a limiting condition for operation or plant shutdown required by a limiting condition for operation.

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David A. Bixel Assistant Nuclear Licensing Administrator l

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