05000271/LER-1980-017-03, /03L-0:on 800424,PCIS Valve FSO-109-76 Failed to Close When Stroked During Quarterly Tests.Caused by Accumulation of Dirt on Plunger Assembly.Valve Cleaned & Returned to Svc

/03L-0:on 800424,PCIS Valve FSO-109-76 Failed to Close When Stroked During Quarterly Tests.Caused by Accumulation of Dirt on Plunger Assembly.Valve Cleaned & Returned to Svc

ML19323F757
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	05/23/1980
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19323F749	List: 05000271/LER-1980-017, Forwards LER 80-017/03L-0 05000271/LER-1980-017-03, /03L-0:on 800424,PCIS Valve FSO-109-76 Failed to Close When Stroked During Quarterly Tests.Caused by Accumulation of Dirt on Plunger Assembly.Valve Cleaned & Returned to Svc
References
LER-80-017-03L, LER-80-17-3L, NUDOCS 8005290437
Download: ML19323F757 (1)

LER-1980-017, /03L-0:on 800424,PCIS Valve FSO-109-76 Failed to Close When Stroked During Quarterly Tests.Caused by Accumulation of Dirt on Plunger Assembly.Valve Cleaned & Returned to Svc

Event date:
Report date:
2711980017R03 - NRC Website

text

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CF U.S. NUCLEAR REGULATORY COMMISSION P)'.m,0(1366 i

(7 LICENSEE EVENT REPORT LER 80-17/3L j

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5 60 61 OOCKET NUMB ER 68 69 EV ENT DATE 74 75 REPORT DATE 80 EVENT OCSCRIPTION AND PROBA8LE CONSEQUENCES h 10l2l lPCIS valve FS0-109-76B failed to close per Tech. Spec. 4.7.D.1 when stroked dur h I

i o,3, iquarterly tests. Valve 76A was closed as required by Tech. Spec. 3.7.D.2.

Valve l

l o 14 l 176B was then repaired and returned to service.

Because of the required isolation, the l

o,s.; l CAM System was also out of service contrary to Tech. Spec. 3.6.C.2.

During this period l, lo is l Ithe sumps were operable and no additional coolant leakage was detected. Based on the l lol7l labove, there were no consequences to oublic health & safety. Previous failures:

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j io,g, lRO 74-17, 72-05, 72-12.

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33 34 33 36 37 40 41 42 41 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h liloll Inspection of ATKOMATIC-Series 15800 Isolation Valve showed an accumulation of dirt on l lilil lthe plunger assembly. This caused the plunger to stick in an intermediate position I

g lwhen actuated by the valve solenoid:

After the valve was cleaned and satisfactorily l g,,3l l tested, it was returned to service.

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% POWER OTHE R STATUS 01 O RY DISCOVERY DESCRIPTION I' i 5 l lE l@ l 1l 0 l 0 l@l NA l

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NAME OF PREPARER PHONE:

80 052 9 0 V37