05000271/LER-1980-020-03, /03L-0:on 800617,PCIS Valve FSO-109-76A Failed to Close After Scram.Caused by Dirt on Plunger Assembly.Valve Cleaned & Returned to Svc

/03L-0:on 800617,PCIS Valve FSO-109-76A Failed to Close After Scram.Caused by Dirt on Plunger Assembly.Valve Cleaned & Returned to Svc

ML19326D874
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	07/17/1980
From:	Murphy W VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19326D873	List: 05000271/LER-1980-020, Forwards LER 80-020/03L-0 05000271/LER-1980-020-03, /03L-0:on 800617,PCIS Valve FSO-109-76A Failed to Close After Scram.Caused by Dirt on Plunger Assembly.Valve Cleaned & Returned to Svc
References
LER-80-020-03L, LER-80-20-3L, NUDOCS 8007230489
Download: ML19326D874 (1)

LER-1980-020, /03L-0:on 800617,PCIS Valve FSO-109-76A Failed to Close After Scram.Caused by Dirt on Plunger Assembly.Valve Cleaned & Returned to Svc

Event date:
Report date:
2711980020R03 - NRC Website

text

{{#Wiki_filter:NRCP0pM384, ~ ~ U.s. NUCLEAR REIULATCGY COMMIO3I3Z) ~' ~ (7 77i LICENSEE EVENT REPORT LER 80-20/3L i CONTROL BLOCK: l l l l l l (PLEAsE PRINT CR TYPE ALL REQUIRED INPCRMATION) l loTil lv IT lv lY ls 11 l@l 0101 -l 0101 Ol o f o l l o f o l@l 4 I i l i i i l 1 l@l I l@ 7 8 9 LICEN8EE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE J0 57 CAT $8 CON'T 'IOI1I Eu'RC l Ll@l 0l 5l 0l 0] 0l 2l 7 l 1l@l 0 l 6 l 1 l 7 I 8 l 0 l@l o I 7 l 1 l 7 I R l 0 l@ ? 8 80 81 DOCKET NUMBER 68 69 EVENT OATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h I [5T O lPCIS valve FSO-109-76A failed to close per Tech. Spec. 3. 7.D.1 f ollo1.rine a neram-g ; Valve 76B automatically closed as required and was maintained closed while Valve 76A l 1014 l lwas repaired and returned to service. Because valve 76B provided containment isola-1 pg pq l tion and the containment sumps were operable (and showe.1 no abnormal leakage) there I g lwere no consequences to public health & safety. Previous failures: R0 80-17. l l0l7l174-17, 72-05, 72-12 l I 101811 $$EE Co$ sNCO$E COMPONENT CODE SUSC OE SU E ULLS.J l s l C l @ LE_j h [ B,_j h l V l A I L l V l O l P lh W h W h 7 8 9 to 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LER/Ro EVENT YEAR R EPORT NO. CODE TYPE N O. @ su,Po,g 18 l0l l_l 10l2l0l y 10 13 l Lt_] L-- J L.o._1 as ,_21 22 23 24 26 27 28 29 30 31 32 K AC O O L NT ME HOURS S8 i FOR 8. su Li MAN FACT RER l B l@[Z_j@ lZl@ lZl@ l 0 10 l 0 10 l lN l h (,_Y,j h d h lA l5 l 3 l Slh 33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h I g 1 Inspection of ATKOMATIC-Series 15800 Isolation va v. ahnuaa mn ocrou-,1 c<me er a4.* mm g lthe plunger assembly. This caused the plunger to stick in an inter-adiata nnair4an I lwhen actuated by the valve solenoid. After the valve was cleaned and satisfactorfiv I g l tested, it was returned to service. Preventative maintenance program is beine l gevaluated to preclude potential future events. I j 80 7 8, OTHER status @Dis 5Nv' DiscovERv OEsCRipriON @ 's*TEs* sPowER NA I (,A_j@l Operator Observation l [G_J@ l0l0l0l@l i s A TivtTY' CO TENT f"ELEASED OF RELEASE AMOUNTOF ACTIVITY LOCATION OF RELEASE l NA l l NA l 1 6 7 8 9 10 11 44 46 80 PERSONNEL EXPOSURES l0lUMdERl 0 gggl DESCRIPTION N TYPE NA l 1 7 ,ERso~NE L iN;uWiEs DESCRIPTION @ NUMBER NA l 1010101@l i a ~7 8 9 11 12 80 LOs3 oF OR DAMAGE TO FACILITY TYPE

DESCRIPTION

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