ML20062D769

LER#78-051/03L-0 on 781031:solenoid Valve 1-SV-4043 for Main Steam Isolation Valve Hydraulic Accumulators Was Leaking Due to Failure of 1 of 4 O Ring Seals.Cause of Ring Failure Unknown.All 4 Seals Replaced & Valve Returned to Svc

ML20062D769
Person / Time
Site:	Calvert Cliffs
Issue date:	11/17/1978
From:	Davis S, Watkins K BALTIMORE GAS & ELECTRIC CO.
To:
Shared Package
ML20062D767	List: ML20062D761 ML20062D769
References
LER-78-051-03L, LER-78-51-3L, NUDOCS 7811300199
Download: ML20062D769 (1)

Text

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REPORY DATE EVENT oESCRIPT1oN ANo pro 8ABLE CoNSECUENCES h Io#2l l At 2030 it was discovered that solenoid valve 1-SV koh3 for main steam I io ;3; jisolation valve hydraulic accu =ulators had developed an oil leak. The l io i4 Iaccu=ulators were isolated and 11 main steam isolation valve declared l 1o is1 I inoperable per T.S. 3.7.1 5 The oil leak vas repaired and 11 main 1 io t6 i lstess isolation valve returned to service at 2h00. This is not a l l o I 7 I l repetitive occurrence.

l Tii 1 I I System CAUSE CAUSE COM8 VA LV E CODE . COCE SL8CCCE COMPONENT CODE SUSCODE SUSCOCE lo191 7 8 l C l D l@ y@ l3 l@ l Vl Al Ll Vl 0] P[@ [ F [@ lZ l@

9 to 11 12 13 18 19 20 SEQUENTt A L OCCUR R ENCE REPORT REVISICN

,, EVENT YEAR R EPORT NO. CODE TYPE NQ.

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43 A4 47 CAUSE oESCftlPT1cN ANo CORRECTIVE ACT1cNS @

l i 131 [ Upen investigation one of four "O" ring seals,Part #62 of Vendor Dvg.

I It It I l 21110-0202-C00. for the solenoid valve was found to have failed, result-  !

. , g i ing in hydraulic fluid leakage. All four seals were replaced and the l 1, tai tvalve returned to service. No cause for failed "0" ring could be deter- l lii4 ! [ ined. As this is an isolated'occurr-nce no further acticn is necessary.

- l a s 80 5A %PCwER OTHER STATUS Cis O RV DISCOVERv DESCRIPTION IiI5i 'LE.J@

lo 1916'*l@l" NA I 13 I@l overator ot=*rvatica- I

! ACTivirv C0'OTtNY

1. E'.EASEO C.* RELE ASE AMOUNT CP ACTIVITY LCCATICN CF RELEASE I1 is8 9l W @ y@l 7 1J NA l l NA l tt 44 45

1. 1RSONNEL EXPOSURES 80 r s veer YveE CEsCRietiCN l NA l' t ( 7* l'l 0 l 0 l 0 l@l Z l@l' l esRsoNNiu'.md5Es '*

NuveER oEsCRIPTiCNh lil4llO!0l0l@l

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t053 Os CR DAMAGE TO PActLITY -

80

' vet CE5CPIPT:CN i ' I >4 I3LO@l tc 3^ 781130om4 l S0 ti$y E 12101 lj8l ESCPipytCN NA 7 3 7 ?O f ffIl lllill IIl*

65 69 83 3 Nt. ate Cp poEPARER PwoNE.

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