ML20031C188

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RO 77-50:on 771222,during Monthly Specific Gravity Checks on Reactor Depressurization Sys Battery A,Cell 12 Found to Have Specific Gravity of 1.194.Cause Unknown.Battery Given Equalizing Charge
ML20031C188
Person / Time
Site: Big Rock Point File:Consumers Energy icon.png
Issue date: 01/12/1978
From:
CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
RO-77-50, NUDOCS 8110060617
Download: ML20031C188 (1)


Text

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UCENSEE EVENT REPORT 2:s 3 :7. Fein:

conTnct stocx:l l l l l l l (PLsass pens? ALL nseumso assonemation) 1 6

u uctNs4 Nuusta 7

n j ulIIBlalPill 10101-10101010101-!o101 14flillllll 10!31 7 89 14 13 E3 25 30 31 32 N [uS Docxt? Nuwe6m rytwT cart NE70mf DATT EcCN T l I I LtJ Lt.j inisini-inti M 11:21212 7 I 71 I ct: r i t el-I s t 7 8 57 58 Sa 60 61 c8 ES 74 75 b3 EVENT DESCRPT'ON 01; l During -onthly seccific gravity checks on the Reactor Depressuri:ation System Bat-l 60 7 89 00 l terr L cc11 12 vas frund to have a snecific eravity of 1.104.

All other cells in l 80 7 89

[ t' a u it ratisfied the Technient Soecif tentien limit of b l.200 and the hatterv was l r

0 60 7 89 015 I olaced on equalizine charge. Previous incident reported as RO-77 t9 on 10/27/77.

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60 7 89 R0-77-so l

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N COOf COM80N(NT CCOf 7WWE WCLATEpe E Lt.LcJ [fJ lai^lrI:1RITI 12.J ltI sis sI L.xJ 7 89 10 11 12 17 43 44 47 48 CAUSE DESCAPTION e l Exact cause is not known. Electrolyte mixing did not provide adequate specific l

80 7 89

@ l cravity sample but placing battery on equali:ing charge brought specific gravity l

7 89 gg 10 l to 1.200 in less than 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

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10 12 13 44 45 46 60 Ac codTENT AwouMT C8 ACTlVftY LOCATCao CF RELIAse OF At:.1ASE l SA l

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PELLASED 1 12 7 8 9-10 11 44 45 go PERSCNNEL EXPCSURES Nuween tvPt otscsumon is lo l o l ol LzJ I xx I

7 89 11 12 13 80 PERSONNEL 24UAiES Nuwsea etscRenoes t 'd Inl0lni INA l

7 89 11 12 80 PROBABLE CONSEQUENCES l None. Battery is deeme3 adequate to perform its safety function.

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