ML19323F757

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LER 80-017/03L-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
ML19323F757
Person / Time
Site: Vermont Yankee Entergy 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:
References
LER-80-017-03L, LER-80-17-3L, NUDOCS 8005290437
Download: ML19323F757 (1)


Text

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! CF U.S. NUCLEAR REGULATORY COMMISSION i

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.m,0(1366 j q LICENSEE EVENT REPORT LER 80-17/3L i V CONTROL BLOCK: l 1

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) l O l8 t9 l l V LICENSEE 7

l T l VCODE l Y l S l 1 lgl50 l0 l-LICENSE 14 1 l0 l0NuM8ER l0 l0 l0 l- l0 l025 l@l 26 4 lLICENSE 1l 1l TYPt: 1l 1l@l JO l

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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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! SEQUENTIAL OCCURRENCE REPORT REVISION

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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 i 1

After the valve was cleaned and satisfactorily l g lwhen actuated by the valve solenoid: l l

g,,3l l tested, it was returned to service. l I -

L'_.L' I I 80 7 8 9 SA  % POWER OTHE R STATUS 01 O RY DISCOVERY DESCRIPTION NA Surveillance Test I i 5 l lE l@ l 1l 0 l 0 l@l l lBl@l l ACTtVITY CO TENT RELEASEO OF RELEASE AMOUNT OF ACTIVITY @ ' LOCATION OF RELEASE @

li 16 l lZ l h l10Z lgl NA l l 45 NA 80 l

7 8 9 11 44 8ERSONNEL FxPOSURES NUMBER DESCRIPTION I i l 7 l 10 l0 l0 lhlTYPEZlhl NA l l

' ' ' ,ERSO~~a'iN2U!!ES NUMBER DESCRIPTION y l0 l0 l0 l @ l NA 80 l

7 8 9 11 12 LOSS OP OR OAMAGE TO FACILITY TYPE DESCRIPTION NA l l i l 98 l9lZ l@l10 7 80 7 8 9 ISSUE n i o i IN f81 DE CRIPTION

'3 NA l 68 69 IIlllll1lIIIl$1 80 &

NAME OF PREPARER PHONE:

80 052 9 0 V37