05000316/LER-1981-058

LER 81-058/03X-1:on 811023,RCS Leak Rate Estimated to Be in Excess of Tech Spec Limits.Caused by Crosby 2x3 Style JB-25-3 Valve Found to Be Lifting at 230 Psig Rather than 600 Psig Setpoint.Valve Replaced

ML20053F004
Person / Time
Site:	Cook
Issue date:	06/03/1982
From:	Wizner D INDIANA MICHIGAN POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20053F001	List: 05000316/LER-1981-058, Forwards LER 81-058/03X-1
References
LER-81-058-03X, NUDOCS 8206100287
Download: ML20053F004 (1)

LER-2081-058,

Event date:
Report date:
3162081058R00 - NRC Website

text

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LICENSEE EVENT REPORT CCNTACL S LCCK: l l l l l 1 l (PLEASE PRINT OR TYPE ALL REQUIREO INFORMATION1 1 .

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4A 42 43 47 CAUSE ::ESCRIPTION AND CCARECTIVE ACTIONS 27 g;3ll THE CROSBY 2" X 3" STYLE JB-25-3 ALVE WAS FOUND TO BE LIFTING AT 230 PSIG RATHER ,

,,,j ; THAN ITS 600 PSIG SETPOINT. THE LOW SETPOINT WAS DUE TO EXCESSIVE SEAT LEAKAGE. ,

- THE VALVE WAS REPLACED WITH A NEW VALVE. INSPECTION OF THE FAILED VALVE DETERMINED 1ii:! I I

,, 3,, g THAT VALVE SEAT LEAKAGE ALLOWED THE SYSTEM PRESSURE TO ACT ON A LARGER SURFACE  ;

.,,, g AREA WHICH EFFECTIVELY LOWERED ITS SETPOINT.  ;

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