ML19329F970

RO-80-029/01T-0:on 800627,pressurizer Power Operated Relief Valve PCV-2456 Inadvertently Opened in Mode 3 Following Valve Maint Activities.Corrective Action Will Be Taken Pending Completion of Investigation

ML19329F970
Person / Time
Site:	North Anna
Issue date:	06/27/1980
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
References
NUDOCS 8007110420
Download: ML19329F970 (1)

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IN @. .(HT CQNTAINS-USNRC REGION :*

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' Virginia Electric and Power Company 80 JllN 27 P l ** (M '.I.,r

-North Anna'Pewer Station.' Unit %.12 ..

Docket No.~50-339 tNPF-7 ~'

. .. 2 24 Neur Repartable ~ Event >

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Event: Pressurf 2er power operated relief valve inadvertently opensd in Mcde 3 following valve maintenace activities.

LEll/R0 80-029/01T4 Unit. 2 pressurizer power:oparated relief valve designed FCV-2456 opente inadvertently shile being placed in sarvica follcuing corrective maintenance

,[ . Initial aparator action. closed tha. upstream motor operated isolation valve

.I.IOV-2535, thereby'tarninating: pressure relief.

.This avant is beinc~ repotted in accordance with NRC latter of Hay 7.

kS80, 'Section II :K.3.3.; position' (ah " Future failures of a relief valve to close should be reported promptly to the NRC."

1 At the timesof the.* Reportable Event, Unit I was in Mcde 1 and Unit 2

' was maintalaing. Hot Star.~dby.

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corrective action to be taken is.pending completion of further investi-gation.

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