ML20041F218

LER 82-012/03L-0:on 820208,during Surveillance Testing,Msiv Leakage Control Sys Bypass Valve MOV-8403C Failed to Close. Caused by Failed Auxiliary Switch on Motor Starter Contractor Coil Mfg by Allis Chalmers.Switch Replaced

ML20041F218
Person / Time
Site:	Duane Arnold
Issue date:	03/05/1982
From:	Varner D IES UTILITIES INC., (FORMERLY IOWA ELECTRIC LIGHT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20041F214	List: ML20041F213 ML20041F218
References
LER-82-012-03L, LER-82-12-3L, NUDOCS 8203160298
Download: ML20041F218 (1)

Text

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EVENT oESCRIPT1oN ANO PaOSASLE CCNSECUENCES h 10 : 21 i During norra31 operation while performing surveillance testing, main stea 1

[ 5 TTl I m isolation valve (MSIV) leakage control system (LCS) bypass valve, MOV- I la tai I 8403C, opened as required, but failed to close. This made the 'C' subsys I f a ls t I tem of the MSIV-LCS inoperable and a 30-day limiting condition for opera i Io ts ! I tion (LCO) was henon as required hv Technical Specification 3.7.E.2. The I l o 6 71 i MSIV-LCS subsystems on the other three main steam lines were operable. T l to4eiI here have been no orevious similar occurrences. 80 I

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ii to t i MOV-8403C f ailed to close because of a f alid auxiliary switch on the mo I ii iii 1 tor starter contactor coil. The cause of the switch failure is unknown. 1 si,2i l The auxiliary switch was replaced with an identical component and M0V-84 1 lii s t 1 03C was functionally tested satisf actorily. The contactor coil was manuf I ii t. I I actured hv Allis Chalmers. No further corrective action is required. I 1 e a ao "s'r*4 E7 vowea ofwensTarus @ EsEoEv' oisc l i I s I LE,J@ l 0 l 9 l 2l@l NA l lB[gl SURVEILLANCE IESTsay oesCairri l l abvify C NrENT

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