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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ENSEE EVENT REPORT-CONTROL 8 LOCK:l l l l l l l [ngang pageT An 28eums0 =-73000 1 6

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[0E I Ml I l P I A l t l I14l 10101-10101010101-1o101 l h l l 1111111 10131 )

7 89 15 25 26 30 31 32 30 OOCKET NUMBER EVENT OATE REPORT OATE 01 CONT [_[_j l, L_j l0 l 5 l 0l-1012 l 5 l S l l 0lh l1l OlTl 6l 10 l 5 l1 l h l 716 l  !

7 8 57 58 58 60 61 68 68 74 75 80 I EVENT DESCRFTION

@ lDuring testing of the containment spray system the left channel relay (No SP7. l 7 89 . 30

@ 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. (ER-76-00) l 7 89 80 hl 7 89 l

pumaE 80 C COMPONENT CODE VOLATBN E l SI B l L!.1 7 89 10 11 IIl NI SI Tl R lUI 12 17 W43 44 lCl 3l 6l 0l 47 (N,j 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 7 89 80

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'sE s powEa OTm m status "EvEN O OeCOvEnv OEsCaptoN 1

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46 NA l 80 RELEA O O SE AMOUNT OF ACTMTV LOCATON CP RELEASE E LzJ Lz_J l NA l l Ni l 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMeER TvPE DESCmpTCN M 1010101 7 89 Lz_J 12 l NA l~

11 13 80 PERSONNEL INJURIES NUMMA OESCmPTON D[ l0]0l0l l NA l 7 89 11 12 80 l PROBA8LE CONSEQUENCES

@G l_None - The Technical Specifications permit limited operation vith system out of l

< 7 89 80 service.

LOSS OR OAMAGE TO FACIUTY Typt nesCmPTON

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7 89 80 ADOITIONAL FACTORS I NA 89 8308150374 760514 80 PDR ADOCK 05000255 i S PDR l

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's, '7 : . .,_ , ,*eq.~. n Mr Janes G. Keppler Office of Inspection Enforcement s

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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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