05000333/LER-1980-052-03, /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

/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: 05000333/LER-1980-052, Forwards LER 80-052/03L-0 05000333/LER-1980-052-03, /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
References
LER-80-052-03L, LER-80-52-3L, NUDOCS 8007010495
Download: ML19318C456 (1)

LER-1980-052, /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

Event date:
Report date:
3331980052R03 - NRC Website

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

CONTROL SLOCK: l l

l l

l l lh (PLEASE PRINT OR TYPE ALL r.EQUIRED INPORMATION) 1 6

l0 l t l lN lY lJ l A lF l 1 l@l0 l0 l-l0 l0 l0 l0 l -l 0l 0l O l@l h l i l 1 l 1I 1l@l l

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7 8 9 UCENSEE CODE 14 15 UCENSE NUMSER 25 25 UCENSE TYPE 40 57 CAT SE CON'T I O I 11 -

$U l L l@l 0 l 5 l0 10 10 l 3 l 3 l3 l@l 0 l 5 l 2 l 8 ! 8 l 0 l@l-0 l 6 l2 l 5 18 l0 l@

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60 St OOCKET NUMSER 68 89 EVENT CATE 74 75 REPORT CATE 80 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 ll l E lh l Elh l Elh lI lN lS lT lR l Ulh l S lh lZ lh 1

8 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 10 l 22 23 24 26 27 28 29 30 31 32 N AC ON ONP T

METN HOURS 22 5

i FrR 8.

SU LIE MA UF RER l E l@l Z l@

l Zl@

l Z l@

l 0 l0 l0 l0 l lN l@

l Y lg l N l@

lM l 3l 0l 2lj 33 34 35 36 37 40 41 42 43 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-AMouNTOF ACTIVITY @ l LOCATION OF RELEASE @

KELEASEO OF REMASE l1 l6l d h d hl NA l

l ya 7

8 9 10 11 44 45 80 1

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 DESC-ON@

NuMuR NA l

Itlall0l0l0lhl 7

8 9 11 12 80 LOSS OF CR CAMACE TO FActuTY Q TYPE

DESCRIPTION

N/

l1 l 9 l l Z l@l NA l

7 4 9 10 80 l2lO1 hl' RIPTION ISSUE NA l

ll lllllIll lIl{

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