ML20084U244
| ML20084U244 | |
| Person / Time | |
|---|---|
| Site: | Palisades  |
| Issue date: | 02/14/1977 |
| From: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| LER-ER-77-010, LER-ER-77-10, NUDOCS 8306280264 | |
| Download: ML20084U244 (2) | |
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V, UCENSEE EVENT REP Paticad ;s
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CONTACL ELCCX:l l
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l (PLEASE PRINT ALL REQUIRED INFORMATION) 1 6
UCENSEE L: CENSE LV?NT NAME LCENSE NUMBER TYPE TYFC
] l:!lIlPlAlLl1l l0l0l-!0l0l0l0l0l-l0l0l lLl1l1llI1l l 0 l1 l 7 89 14 15 25 26 30 31 32 AEPORT AEPCAT NPE SCUACE CCCxET NUMBER EVENT CATE REPCRT CATE hCONT l
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[LJ l015 l o !-l o l 2 l 5 l S l l 011 l 311 l 7 l 7l lol2l1lhl7l71 7 8 57 58 59 60 61 68 69 74 75 80 EVENT CESCA;PTION O2 l On Jsnusrr ?l.1077 ice lesdin: en the 3h5 kV bus tia andstationrevarlinesbatvaanl 7 89 CD l
03 l the Palisades Plant and the svitchyard were cbserved to be grester than normally ex-7 89 60 0
l pected due to the cooling tover plume passing the lines. Plant power level was held l
7 89 60 0
l at 60, until h PCP loss of flow vithout turbine renerator coastdcun could be analyzed l 7 89 a0
@ ] and croper operatien of both diesel generators verified.
(ER-77-10) l 60 7 89 psmes SYSTD 4 CAUSE CCMAGNENT CCMPCNENT CCCE CCCE CCMPCNENT CCCE SUPALER MANUFACTLFER VCLATCN O
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1: l lzlzI:lzl lNl-7 89 10 11 12 17 43 44 47 48 CAUSE CESCBlPTICN Oe l Abnormal icing is due to environmental conditions and operation of the cooling towers. l GC 7 89 09 l FSAR Accident Analysis (See lh.71 does not consider h cu=o loss of flow incident l
' 99 80
, l vithout turbine generator assist as credible.
J 7 89 raC:uTy METHCC CF Status
% PCWER CTHER STATUS C!SCCN EAY C:SCCVERY CESCA:PT:CN h
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lbl l Visual Obs of Tovers & Lines l
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10 12 13 44 45 AS 80 FOAM CF ACTMTV CCNTENT AELEASE3 CF QELEASE AMOUNT CF ACTMTV LCCATICN CF AELEASE 1
l 3l NA NA l
7 8 9
10 11 44 45 80 PERSONNEL EXPCSURES NUMBEA TYCE CESC3!AT:CN 1 13 l 0l 0l 0l l 2l l
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7 89 11 12 13 cu PERSCNNEL INJUA:ES NUM8ER CESCR;PT!CN l0l0l0l l
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14 7 89 11 12 80 PROP.ABLE CCUSEQ,UE:TCES 15 l None; loss of h PCP anal / sis indicates adequate MDN3R.
l 7 89 20 LCSS CA OAMAGE TO FAC!UTY W PE CESC31ptCN UA l
7 d9 1C 50 UUGUC:TY
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19 50 ADDITICNAL FACTCAS 19 l NA l
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..o February 14, 1977
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Mr Ja=es G Keppler
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Office of Inspection & Enforce =ent A,\\(,q 1 Region III s.-
q s-US :Tuclear Regulatory Co==ission g
.g' T99 Roosevelt Road 4-.%
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Glen Illyn, IL 60137
,s DOCKET 50-255, LICE'ISE DPR 's I
PALISADES PLANT - IR-TT FOUR PCP LOSS OF FLO'4 On February 1,1977, we notified the II staff of increased icing on the trans-
=ission towers and lines between the Palisades P3 cnt and the 345 kV switchyard.
The consequences of a co=plete tower failure could result in a condition not specifically considered in the FSAR Section 1h.7
'de, therefore, initiated analysis to deter =ine the structural adequacy of the towers and lines as well as a h-pu=p loss of fl:V without steam generator coastdown. The 4-pu=p loss of flow analysis has been ec=pleted and trans=1tted to the NRC staff for review.
The results incicated the transient to be less severe than others presented in Section 1h.7 of the FSAR. Preliminary analyses of the trans=ission towers and lines have been co=pleted which indicate that a =argin of safety exists for observed ice loadings. Additional evaluations are being made to deter =ine if any modifications to the towers or lines are required.
David P Hoffnan (Signed)
David P Eoff=an Assistant Nuclear Licensing Ad=inistrator l
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1707
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