ML19346A262

LER 81-020/03L-0:on 810501,isolation Condenser Shell Level Instrument IGO6B Found Reading High During Annual Calibr. Caused by Evaporation of Instrument Ref Column.Column Backfilled W/Water to Normal Operating Level

ML19346A262
Person / Time
Site:	Oyster Creek
Issue date:	06/01/1981
From:	Riggle E JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19346A260	List: ML19346A259 ML19346A262
References
LER-81-020-03L, LER-81-20-3L, NUDOCS 8106050515
Download: ML19346A262 (1)

Text

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REPORT QATE EVEN T DESCRIPTION AND PRCBASLE CCNSEQUENCES h

[ o !:1 l Friday, May 1,1981, annual calibrata.on of Isolation Condenser shell level l ga;3,[instrumentI'G06Bwasfoundtobereadinghighby.55ftactualshellside g io ;4; ; level was below Tech Spec limit of >7.2 ft or as found 6.75 ft. This  ;

i a ! s ; ; error or false indication was due to evaporation of the cells reference  ;

1Cse,e colurn. The out of specification time is unknown. The difference was g

c ;;; ; less than 1250 gallons. The occurrence had no effect on public health [

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$YSTEM _CAUSE CAUSE COMP. VALVE

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CAUSE DESCRf 8TICN AND CCARECTIVE ACTtCNS h

,, ,o;j The < ause of the occurrence is attributed to evaporation of the  ;

[,;,l l instrument reference colu:m. ,

, , , , , g The reference column was backfilled with water to its normal ,

I i 121 i perating level ie spill-over to condenser shell volum. _

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