ML19326D874

LER 80-020/03L-0:on 800617,PCIS Valve FSO-109-76A Failed to Close After Scram.Caused by Dirt on Plunger Assembly.Valve Cleaned & Returned to Svc

ML19326D874
Person / Time
Site:	Vermont Yankee
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: ML19326D872 ML19326D874
References
LER-80-020-03L, LER-80-20-3L, NUDOCS 8007230489
Download: ML19326D874 (1)

Text

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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 loTil8 lv 7 9 IT LICEN8EE lv lY CODE ls 11 l@l 0101 -l 0101 14 15 Ol o f o l l o f o25 l@l26 4 ILICENSE LICENSE NUMBER i l i i iTYPE l 1J0l@l57 CATI

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 ?         8 Eu'RC80 l Ll@l             81 0l 5lDOCKET 0l 0]NUMBER 0l 2l 7 l 1l@l  68       69 0 l EVENT 6 l 1OATEl 7 I 8 74l 0 l@l    75     oREPORT I 7 lDATE 1 l 7 I80R l 0 l@

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h [5T O lPCIS valve FSO-109-76A failed to close per Tech. Spec. 3. 7.D.1 f ollo1.rine a neram- I 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 h20 W h 7        8                            9          to           11           12             13                              18           19
                                       ,,,                                       SEQUENTIAL                           OCCURRENCE           REPORT                   REVISION LER/Ro EVENT YEAR                                    R EPORT NO.                              CODE               TYPE                       N O.
                  @        as su,Po,g
                                       ,_21 18 l0l                 l_l         10l2l0l                    y             10 13 l 29 Lt_]

30 L-- J 31 L.o._1 32 22 23 24 26 27 28 1 K AC O O L NT ME HOURS S8 i FOR 8. su Li MAN FACT RER l B l@[Z_j@ 33 34 lZl@ 35 lZl@ 36 l 0 10 l 0 10 l 37 40 lN l h 41 (,_Y,j h 42 d h 43 lA 44 l5 l 3 l 47Slh CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h g 1 Inspection of ATKOMATIC-Series 15800 Isolation va v. ahnuaa mn ocrou-,1 c<me er a4.* mm I 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 7        8 ,                                                                                                                                                                 80        j
                's*TEs*                 sPowER                         OTHER status @Dis 5Nv'                                            DiscovERv OEsCRipriON @

(,A_j@l Operator Observation i s [G_J@ l0l0l0l@l NA I l A TivtTY' CO TENT f"ELEASED OF RELEASE AMOUNTOF ACTIVITY LOCATION OF RELEASE l NA NA l 7 1 6 8 9

                            @       10 l

11 44 l l 46 80 PERSONNEL EXPOSURES N TYPE 1 7 l0lUMdERl 0 gggl DESCRIPTION NA l

                        ,ERso~NE L iN;uWiEs NUMBER               DESCRIPTION @

l

  ~7 i a 8   9 1010101@l12       11 NA 80 LOs3 oF OR DAMAGE TO FACILITY TYPE          DESCRIPTION 1 9         [Zj@l ,

NA 80 l 7 8 9 10 .

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                 -d,UE@l                                             soo723o464Ni                                                                   l 68 69 Lj,,.i'iliIIIll l,;    80 5 7       8 9                 10 Warren P. Murphy mgm                                                                                                 PHONE:        (802T 257-7711
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