ML19318C456

LER 80-052/03L-0:on 800528,during Refueling Operations, Refuel Bridge Movement to Over Core Area Did Not Generate Control Rod Withdrawal Block Per Tech Specs.Caused by Drift at Bridge Position Sensing Limit Switch.Switch Adjusted

ML19318C456
Person / Time
Site:	FitzPatrick
Issue date:	06/25/1980
From:	W. Verne Childs POWER AUTHORITY OF THE STATE OF NEW YORK (NEW YORK
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19318C447	List: ML19318C446 ML19318C456
References
LER-80-052-03L, LER-80-52-3L, NUDOCS 8007010495
Download: ML19318C456 (1)

Text

usac3 @.G a m M E n @i@@iW iKE N essi3EH Gi C (7 77) e LICENSEE EVENT REPORT A

CONTROL SLOCK: l 1

l l l l l lh 6

(PLEASE PRINT OR TYPE ALL r.EQUIRED INPORMATION) ,

l0 l t8 l9 lN lY 7

lJ l A lF l 1 l@l0 l0 l- l0 UCENSE UCENSEE CODE 14 15 l0 l0NUMSER l0 l -l 0l 0l O 25l@l25h l iUCENSE l 1 l TYPE 1I 1l@l40 l

57 CAT SE l@

CON'T I O I 11 - $U CE l60L l@lSt0 l 5 l0OOCKET 10 10 l 3 l 3 l368l@l890 l 5EVENT l 2 CATE l 8 ! 8 l 074 l@l-0 l REPORT 6 l2 lCATE 5 18 l080 l@

' 8 NUMSER 75 EVENT DESCRIPTION AND PROS ASLE CONSEQUENCES h l o ! 21 l During normal refueling operations, personnel noted that refuel bridge movement l Io!3l l to the over core area did not generate a control rod withdrawal block as required l 1 o 141 I by TS 3.10.A.I. No activities involving control rod movement were planned and all l 10 t s i I control rods were fully inserted. Refueling activities were stopped until repairs  ;

l o 181 l were completed. The event did not represent a significant hazard to the public  ;

IoI7l 1 health and safety.  ;

10 4 d 1 l l 80 7 8 9 0E ODE SL C E COMPONENT CODE SUS COE SU ODE loi91 1 8 ll l E lh l Elh l Elh lI lN lS lT lR l Ulh l S lh lZ lh 9 to 11 12 13 18 19 20

_ SEQU ENTI AL OCCURRENCE REPORT REVISION ,

t.E R; RO EVENT YEAR R EPORT NO. CODE TYPE NO.

@ 4Eg l21 8l 0l l-l l015l2l l/l l ol 31 lL l l-l 31 10 l 32 22 23 24 26 27 28 29 30 N AC ON ONP T METN HOURS 22 5 i FrR 8. SU LIE MA UF RER l33E l@l34Z l@ l35 Zl@ l36Z l@ l 0 l0 l0 l0 l 37 lN 41 l@ l Y lg l43N l@ lM l 3l 0l 2lj 40 42 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h lijoll Normal wear and tear or drif t of the refuel bridge position sensing limit switch I li t i l I which generates the Interlock was the cause of malfunction. Switch adjustment and I i,i2i l completion of refuel interlock test restored the system to operable approximately l ii!3i l nine (9) hours later. No additional action required. l lil41 1 I l

7 8 9 80 STA  % POWER OTHER STATUS I O RY DISCOVERY OESCRIPTION I1 15 I Wh l 0l Ol 0lhl NA l l A l@l Operater Observation l

1. TtvlTY CO TENT-KELEASEO OF REMASE LOCATION OF RELEASE @

l1 l6l d h d hl AMouNTOF ACTIVITY NA 44 l

45

@ya l 80 l

1 7 8 9 10 11

1. ERSONNEL EXPOSURES NUMBER TYPE DESCRIPTICN li' 17 l l 0 l 0 l 0' l@l Zlhl NA l

' ' ,ERSO~~ E't iNau' dies NuMuR DESC-ON@

Itlall0l0l0lhl 7 8 9 11 12 NA 80 l

LOSS OF CR CAMACE TO FActuTY Q TYPE DESCRIPTION N/

NA l l1 l 9 l l Z l@l10 80 7 4 9 RIPTION

• ISSUE l2lO1 hl' NA l ll lllllIll lIl{

• S 89007610Yl6 -

_ - 9