05000259/LER-1980-006-03, /03L-0:on 800122,during Refueling Operations, Control Rod Driveline Accumulator Level Switch LS-1-305-129 on Unit 38-11 Was Found Inoperable.Caused by Broken Reed Switch.Switch Replaced

/03L-0:on 800122,during Refueling Operations, Control Rod Driveline Accumulator Level Switch LS-1-305-129 on Unit 38-11 Was Found Inoperable.Caused by Broken Reed Switch.Switch Replaced

ML19296C553
Person / Time
Site:	Browns Ferry
Issue date:	02/20/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19296C546	List: 05000259/LER-1980-006, Forwards LER 80-006/03L-0 05000259/LER-1980-006-03, /03L-0:on 800122,during Refueling Operations, Control Rod Driveline Accumulator Level Switch LS-1-305-129 on Unit 38-11 Was Found Inoperable.Caused by Broken Reed Switch.Switch Replaced
References
LER-80-006-03L, LER-80-6-3L, NUDOCS 8002260636
Download: ML19296C553 (2)

LER-1980-006, /03L-0:on 800122,during Refueling Operations, Control Rod Driveline Accumulator Level Switch LS-1-305-129 on Unit 38-11 Was Found Inoperable.Caused by Broken Reed Switch.Switch Replaced

Event date:
Report date:
2591980006R03 - NRC Website

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8 EVEN1 DESCRIPTION AND PROB ABLE CONSECUENCES h 38-11 uns f nim a I l During refueling operations CRD accumulator level switch en CRD unit o

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. Tfn'nessee Valley Authority Form BF-17 Browns Ferry Nuclear Plant BF 15.2 1/10/79 LER SUPPLEMENTAL INFORMATION BFRO 259 /

8006 Technical Specification Involved 3.3.A.2.e Reported Under Technical Specification 6.7.2.b.1 Date of Occurrence 1/22/80 Time of Occurrence 1430 Unit 1

Identification and Description of Occurrence:

During refueling operations CRD accumulator level switch on CRD unit 38-11 was found to be inoperabic.

Conditions Prior to Occurrence:

Unit 1 @ 0%.

Unit 2 @ 77%.

Unit 3 @ 96%.

Action specified in the Technical Specification Surveillance Requirements met due to inop_erable equ.i ment..... Desc ribe.

l NA Apparent Cause of Occurrence:

The cause of the failure of switch LS-1-305-129 was a broken reed switch..

Analysis of Occurrence There was no damage to plant equipment. There was no activity release, no personnel exposure or injury and no danger to health or safety of the public.

Corrective Action

The switch was replaced and returned to service.

Failure Data:

BFRO-50-260/7909.

f Hetent_ ion -

Pgriod - Lifetime; Responsibility - Administrative Supervisor

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