ML20009A723

LER 81-020/03L-0:on 810605,during Refueling Outage,Check Valves X-81R & X-71E Failed When Tested.Caused by Improper Seating of Valves During Test Procedure.Valves Replaced & Tested Successfully

ML20009A723
Person / Time
Site:	Nine Mile Point
Issue date:	06/29/1981
From:	Neild R NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20009A720	List: ML20009A719 ML20009A723 ML20009A725
References
LER-81-020-03L, LER-81-20-3L, NUDOCS 8107140009
Download: ML20009A723 (1)

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NRC FORM 366 U. S. NUCLEAR REGULATO7.Y COMMISSION tr.m w ~ ' '

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EVENT OESCRIPTION AND PROB ABLE CONSEQUENCES h I o i 21 l During a refueling outage, while performing Instrument Line Flow fuse check l 1 o 13 l l valve testing with the reactor vessel at 800 psi pressure, check valves X-81R and l lo i4 l l X-71E failed. The valves failed to seat.to meet the criteria of the operability f lo Isi l test N1-ISP-IC-19. The reactor was shutdown for refueling; therefore, safety l I

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ii ii g l during test procedure N1-ISP-IC-19. The valves could not be repaired economically: l

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