ML20009H537

Updated LER 81-093/01X-1:on 810615,three Instrument Lines Which Penetrate Containment Were Not Closed.Caused by Three Containment Isolation Valves Left Open Due to Omission from Containment Penetration List.Valves Closed

ML20009H537
Person / Time
Site:	McGuire
Issue date:	07/28/1981
From:	Nardoci P DUKE POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20009H534	List: ML20009H533 ML20009H537
References
LER-81-093-01X, LER-81-93-1X, NUDOCS 8108100220
Download: ML20009H537 (1)

Text

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EVENT DESCRIPTION AND PRCS ASLE CON 5ECUENCES h10 o I While in mode 5, routine surveillance discovered that three instrument lines l o 2 i used in the integrated leak rate test (II.RT) which penetrate containment weref

[TT7l l not closed when containment integrity was established. This represents a l ITTO I degraded mode of operation per technical specification 6.9.1.12F. Since ,

lo is 1 I there was no occurrence which required containment inciation, this accident l g[ did not af fect the health and safety of the public. Had there been an occurrpnce iola ae i t requiring isolation, the VA filters in the auxiliary building would have helppd lessen a,n g eleas g so

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M l Three containment isolation valves were open because the FSAR tables used to ;

EI complete a list of containment penetrations did not. include them. The valves; mI were closed. a leak test performed, and the ILRT amended and reviewed for g (TTTl I further omissions. A temporary verification procedure was written and the l LLL._j i quarterly containment integrity verification procedure will be revised. ,

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.. . .. -. P R E P Ar s r , Phillip B. Nardoci ,gey ,; (704) 373-7432 8108100220 810728 -~

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