05000296/LER-1980-046-03, /03L-0:on 801030,during Steady State Operation W/Unit at 92% Power,Damaged Standby Liquid Control Hydraulic Accumulator Air Valve Resulted in Loss of Charge While Performing MMI-40.Caused by Worker Tightening Valve

/03L-0:on 801030,during Steady State Operation W/Unit at 92% Power,Damaged Standby Liquid Control Hydraulic Accumulator Air Valve Resulted in Loss of Charge While Performing MMI-40.Caused by Worker Tightening Valve

ML19350A114
Person / Time
Site:	Browns Ferry
Issue date:	11/28/1980
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19350A113	List: 05000296/LER-1980-046, Forwards LER 80-046/03L-0 05000296/LER-1980-046-03, /03L-0:on 801030,during Steady State Operation W/Unit at 92% Power,Damaged Standby Liquid Control Hydraulic Accumulator Air Valve Resulted in Loss of Charge While Performing MMI-40.Caused by Worker Tightening Valve
References
LER-80-046-03L-01, LER-80-46-3L-1, NUDOCS 8012020518
Download: ML19350A114 (2)

LER-1980-046, /03L-0:on 801030,during Steady State Operation W/Unit at 92% Power,Damaged Standby Liquid Control Hydraulic Accumulator Air Valve Resulted in Loss of Charge While Performing MMI-40.Caused by Worker Tightening Valve

Event date:
Report date:
2961980046R03 - NRC Website

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EVENT DEOCRIPTION AND PROBAOLE CONSEQUENCES h ITTTl i With unit 3 at 92*/. power during steady state operation, the SLC hydraulic 10131 l accumulator air valve was broken off causing a loss of charce as MMI-40 Lo_L*J l was being performed. There was no danger to the health gy safety of the 1 I O I s I Lpublic and no significant resulting chain of events.

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.e Tennessee Valley Authority Form BF-17 Browns Ferry Nuclear Plant BF 15.2 1/10/73 LER SUPPLDIENTAL INFORMATION BFRO 296 / 80 s Technical Specification Involved 3.4.3.1 Reported Under Technical Specification 6.7.2.b.2 Date of Occurrence 10/30/80 Time of Occurrence 3:30 P.M. Unit 3

Identification and Description of Occurrence:

' While performing MMI-40, the air valve was broken off the SLC hydraulic accumulator resulting in a loss of charge.

Conditions ' Prior to Occurrence:

i Unit 1 G 9 8*/.

steady state power 4

Unit 2 G scheduled refueling outage l'

Unit 3 @ 927.

• steady state power F

Action specified in the Technical Specification Surveillance Requirements met due to inor,erable equipment. Describe.

SI's were run..

Apparent Cause of Occurrence:

A workman overtightened the' valve in attempting to stop a slight leak at the connection. The valve broke off.

Analysis of Occurcence:

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There was no damage to plant equipment. There was no activity release, no personnel exposure or injury and not danger to the health or safety of the public.

Corrective Action

The valve was replaced. No future corrective action is planned.

s Failure Data:

NA

'

• Retention:

Period - Lifetime; Responsibility - Administrative Supervisc,c

• Revision:

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