ML20039C299

LER 81-032/03L-0:on 811120,valves RWCU 68 & 15 Found to Have Seat Leakages Exceeding Tech Spec Range.Cause Not Stated. Disc Replaced & Valves Satisfactorily Retested

ML20039C299
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	12/18/1981
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20039C296	List: ML20039C295 ML20039C299
References
LER-81-032-03L, LER-81-32-3L, NUDOCS 8112290194
Download: ML20039C299 (2)

Text

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MC FOR.'A 366 U,3. NUCLEAR REGULATO"aY COMMISSION t7 77, l

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j o ;3; j found to have seat leakages in excess of that permitted by T. S. Section 4.7.A.4. l I o t a l l Since a sKond valve in each line provided containment isolation, there were no l l o i s t l adverse consequences to the public health and safety. Similar events of RWCU 68 l l a is I l valve failures were reported as LER 79-28 /3L, LER 77-26/3L and LER 76-24 /3L. No i l o 17 l l similar occurrences to RWCU 15 were reported to the conmission. l l364l l  !

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. e VTVYS1 05000271 LER 81-32/3L CAUSE DESCRIPTION AND CORRECTIVE ACTIONS For both valves, the discs were repl6ced .and the valves satisfactorily retested prior to plant startup per T. S. Sec. 3.7.A.4. The valve failure will also be reported in accordance with Appendix J.10 CFR, V.B.3. An engineering evaluation to reduce the failure rate of RWCU 68 valve will be performed. It should be noted that RWCU 68 valve was evaluated as not a containment isolation valve La our September 19, 1980, Appendix J Submittal to the NRC.

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