05000237/LER-1981-005-03, During Local Leak Rate Testing,Measured Leakage of Single Isolation Valve Exceeded Tech Specs.Caused by Normal Deterioration of Valve Seat. Valve Replaced

During Local Leak Rate Testing,Measured Leakage of Single Isolation Valve Exceeded Tech Specs.Caused by Normal Deterioration of Valve Seat. Valve Replaced

ML20009C065
Person / Time
Site:	Dresden
Issue date:	06/15/1981
From:	Zirwas K COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20009C057	List: 05000237/LER-1981-005, Forwards Updated LER 81-005/03X-L.Deviation Rept Encl 05000237/LER-1981-005-03, During Local Leak Rate Testing,Measured Leakage of Single Isolation Valve Exceeded Tech Specs.Caused by Normal Deterioration of Valve Seat. Valve Replaced
References
LER-81-005-03X, LER-81-5-3X, NUDOCS 8107200232
Download: ML20009C065 (2)

LER-1981-005, During Local Leak Rate Testing,Measured Leakage of Single Isolation Valve Exceeded Tech Specs.Caused by Normal Deterioration of Valve Seat. Valve Replaced

Event date:
Report date:
2371981005R03 - NRC Website

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U. S. NUCLEA3 ff EGULATO3Y COMMISSION A

ORT hed ous Report LICENSEE EVENT REPORT Date - 01/29/81 CONTROL SLOCK: l l

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8 60 61 DOCKET NuM8ER 64 69 EVENT DATE 74 T

REPORT DATE do EVENT CESCRIPTION AND PROBA8LE CONSEQUENCES to I 2 I I uring local leak rate testing of con ainment tent line, the measured leakage was D

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) 13l l1715.55 SCFH which exceeds Tech. Spec. 4.7.A for single iso'_ation (29.38 SCFH).

3,,; l Investigation showed leakage through A0-2-1601-23.

No leakage was detected through g jany other valve. The safety significance was minimal since all leakage was con-g

) is I Itained in the venC line. Similar Events:

50-249/80-07. Health and safety of the l7l{pblic was not affected.

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CAUSE COMP VALVE CODE COCE SU8 CODE COMPONENT CODE SU8 CODE SUSCCOE lS lD l@ y@ lF l@ l Vl Al Ll Vl El Xl@ l B l@ [ D l @

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10 11 12 13 18 19 20 SEQUENTIAL OCCURAFNCE REPORT R EVISION t

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CAuSE DESCRIPTION AND CCRRECTIVE ACTICNS The g ; valve was replaced and local '.eas Rtc tested satisfactorily. No further action yrequired.

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% POWER OTH ER STATUS 01 O RY DISCOVERY DE',CRIPTION I

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YEAR NO.

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PART I l TITLE OF EVENT OCCURRED 1-17-81 1100 Failure of 2-1601-23 Valve to Pass LLRT DATE T lite REASON FOR SUPPLEMEffTAL REPORT Update Cause Description and Corrective Actions.

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