ML20052G140

LER 82-007/01T-0:on 820422,during Refueling Outage,Leak Repair Procedures on Valve PS-1A Revealed Significant Boric Acid Corrosion Wastage on body-to-bonnet Bolts.Caused by Bolt Degradation.Affected Bolts Replaced

ML20052G140
Person / Time
Site:	Kewaunee
Issue date:	05/06/1982
From:	WISCONSIN PUBLIC SERVICE CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20052G136	List: ML20052G135 ML20052G138 ML20052G140
References
LER-82-007-01T, LER-82-7-1T, NUDOCS 8205140346
Download: ML20052G140 (1)

Text

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CON'T l0l11 $n"E l60L @l630 l 5 l0DOCKET l 0 l0 l3 l0 l 5 66 @l 0 l 4 EVENT l 2 l DATE 2 l 8 l 2. 74l@l75 0 l REf' 5 lORT 0 DATE l 6 l 8 l2 80 lh

1. 0 NUMREH 69 EVENT DESCRIPTION AND PROBADLE CONSEQUENCES h o 2 l During the 1982 refueling outage, leak repair procedures on valve PS-1A (pressurizer l

[U [3 l l spray) revealed significant boric acid corrosion wastage of the bod 9-to-bonnet bolts. l

[o l4 l l Valve failure did not occur, therefore, there was no safety significance. 'Ihis is 1

[o [ 3 l l reportable as a discovery of a safety related component requiring corrective measures l 0 s I to prevent the existance, or development, of an unsafe condition (T.S.6.9.2.a.(9)). l l0 l7l l There was no effect on public safety or plant operation. l 10181 l l 7 8 9 80 SYST E F.9 CAUSE CAUSE COMP. VALVE CODE CODE SU8 CODE COMPONENT CODE SUSCODE SUBCODE 7

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' CAUSE DESCRIPTION AND CONNECTIVE ACTIONS 27 l .1 l 0 l l Ibit degradation was caused by boric acid induced corrosion wastane. All bolts on I i i l this valve were visually inspected and the affected bolts replaced in kind. A I

, , .l similar occurrence was reported under LER 81-08 and LER 82-08. Investigation is [

[g l continuing to determine what corrective actions are necessary. l 1114] l I 7 8 9 80 ST s  % POWE R OTHER STATUS Dis RY DISCOVERY DESCRIPTION 1 5 lIIlh l0l0l0lhl NA l (_A_jh! Repair Procedures l CCTIVITY CO TENT RELEASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE i c na l I na l 7 8 9 Lz1 @ L:Ll@l 10 11 44 45 80 FIRSONNEL f XPOSURES NUY8FR DESCRIPTION 1 7 l 0l 0 l 0 lh[TYPEZ_jhl NA l PERSONNE'L UUU IES NUV8EH DESCRIPTION @ '

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i LOSS OF OR DAMACE TO FACILITY Q TYPE DESCRIPTION v 7

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