05000259/LER-1980-075-03, /03L-0:on 801006,valve Position Indication for Steam Supply valve,FCV-71-3,lost.Caused by Corrosion on Terminal Block Inside Junction Box.Corroded Terminals Bypassed Temporarily & Will Later Be Replaced

/03L-0:on 801006,valve Position Indication for Steam Supply valve,FCV-71-3,lost.Caused by Corrosion on Terminal Block Inside Junction Box.Corroded Terminals Bypassed Temporarily & Will Later Be Replaced

ML19340B885
Person / Time
Site:	Browns Ferry
Issue date:	11/04/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19340B883	List: 05000259/LER-1980-075, Forwards LER 80-075/03L-0 05000259/LER-1980-075-03, /03L-0:on 801006,valve Position Indication for Steam Supply valve,FCV-71-3,lost.Caused by Corrosion on Terminal Block Inside Junction Box.Corroded Terminals Bypassed Temporarily & Will Later Be Replaced
References
LER-80-075-03L, LER-80-75-3L, NUDOCS 8011120517
Download: ML19340B885 (2)

LER-1980-075, /03L-0:on 801006,valve Position Indication for Steam Supply valve,FCV-71-3,lost.Caused by Corrosion on Terminal Block Inside Junction Box.Corroded Terminals Bypassed Temporarily & Will Later Be Replaced

Event date:
Report date:
2591980075R03 - NRC Website

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.o EVENT DESCRIPTION AND PROPABLE CONSEQUENCES h 10121 l During nor-al operation on overstor discovered loss of valve oosition indication for 1 g l RCIC Steam Supply Valve FCV-71-3 The valve would have closed from an auto close l

Ioi4l l signal but the operator would not have been aware of the position. Refe rence l

t Lo_L5J l T. S. 3.7.D.1 'e 2 and 3.5.F.2.

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Io is I resulting events. There was no danger to health or safety of public. No previous i

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CAUSE CESCRIPTION AND CORRECTIVE ACTIONS l l o 1 l Cause was corrosion on GE,12 point, 600V, 30 amp, Model 6422h82612 ter ninal block, l

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Tennessee Valley Authority Form BF-17 browns Ferry Nuclear Plant Bf 15.2 1/10/79 LER St*PPLEMENTAL INFORMAT!ON bFitO-50 ng / gg,E_ Technical Specification Involved J.7.D.1 & 2 and 3,.5_.F.2 Reported Under Technical Specification 6.7.2.b (2)

Date of Occurrence 10-6-80 Thee of Occurrence __0,555 Unic 1

Idi ntification and Descr4 tion of Occurrence:

Valve FCV-71-3 lost position indication. The valve would have closed from en auto close signal but the operator would not have been aware of the position.

Conciitions Trsir to Occurrence:

Unit 1 9 99%

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Unit 2 @ O Uiiit 3 G 99%

Aetmn specified in the Technical Specification Surveillance Requirements met due to inoperable equipment.

Describe.

HPCI verified operable.

A:ru reat Cause of Occurr^nce:

Cause was corrosion of terminals on GE teminal block inside junction box 1d81.

.t[.a_l'/ sis of Occurrence:

There was no ds= age to plant equipnent. Then was no activity release, no personnel exposum or injury and no, danger to the health or safety of the public.

Corrective Action

The corroded terminal block was bypassed by temporarily mmoving snd splicing together the associated wiring. *"le teminal block will be replaced during the next e'xtended outage. This junction box for fi-2 and U-3 will be inspected during respective refueling outt.ges, due to the fact it is located in the rain V_fdari"bYtk:

NA Wtention:

eriod - Lifetime; Besponsibility - Aduainistrative Supervisor

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