ML20002B977

LER 80-046/03L-0:on 801117,isolation Valve on Discharge Line from Drywell Equipment Sump G, RW-A0-94,would Not Open. Caused by Hard & Worn U-cup Seal in Piston Air Operator. New Piston U-cups Installed & Valve Retested

ML20002B977
Person / Time
Site:	Cooper
Issue date:	12/15/1980
From:	Scheer J NEBRASKA PUBLIC POWER DISTRICT
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20002B975	List: ML20002B974 ML20002B977
References
LER-80-046-03L, LER-80-46-3L, NUDOCS 8101070480
Download: ML20002B977 (1)

Text

RC FORM 366 U.S. NUCLEAR REGut.ATORY COMMISSION

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LICENSEE EVENT REPORT CcNTRot stoCx: l l l 1 l l (PLEASE PRINT OR TYPE ALL REQUIRED INFoRMATION)

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EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h 1oj2l lDuring cold shutdown, while performing S.P. 6.3.1.4. RW-AO-94 would not anon nfene 1 90,3; ;being closed. RW-AO-94 is required to close in <l5 seconds per RTS 3.7.D.1, Table I i, l .i ] [3.7.1 and reopen to verify operability. No significant occurrence took place. RW- I lo Isl lAO-95 was tagged closed per Tech. Spec. 3.7.D.2. There were no adverse affects to I l a !s I !public health and safety. (Reference LER 80-36) I lo !7! l I I

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43 44 47 CAUSE DESCRIPTION AND CCRRECTIVE ACTICNS l i i o l lA Miller-64A single piston air operator installed on the inboard isolation valve on l lilijla discharge line fron drvvell eauipment sump "G". would not coen after beine closed.1 ji6 iINew piston U-cups were installed in the operator aftor the old ones were found to bd I

Ii131lhard and worn. The valve was then retested oer Survet11ance Procedura 6. 3.1. 4.

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