05000296/LER-1981-022-03, /03L-0:on 810511,during Normal Operation,Valve FCV-74-57 Motor Starter Thermal Tripped Upon Opening & Closing.Caused by Broken Bolts Which Hold Motor Together. Motor Bolts & Bearings Replaced

/03L-0:on 810511,during Normal Operation,Valve FCV-74-57 Motor Starter Thermal Tripped Upon Opening & Closing.Caused by Broken Bolts Which Hold Motor Together. Motor Bolts & Bearings Replaced

ML20004D545
Person / Time
Site:	Browns Ferry
Issue date:	06/04/1981
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20004D539	List: 05000296/LER-1981-022, Forwards LER 81-022/03L-0 05000296/LER-1981-022-03, /03L-0:on 810511,during Normal Operation,Valve FCV-74-57 Motor Starter Thermal Tripped Upon Opening & Closing.Caused by Broken Bolts Which Hold Motor Together. Motor Bolts & Bearings Replaced
References
LER-81-022-03L, LER-81-22-3L, NUDOCS 8106090516
Download: ML20004D545 (2)

LER-1981-022, /03L-0:on 810511,during Normal Operation,Valve FCV-74-57 Motor Starter Thermal Tripped Upon Opening & Closing.Caused by Broken Bolts Which Hold Motor Together. Motor Bolts & Bearings Replaced

Event date:
Report date:
2961981022R03 - NRC Website

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Ten.ie:see Valley Authority Fonn BF-17 Browns Ferry Nuclear Plant BF 15.2 3/24/81 LER SUPPLEMENTAL INFORMATION DFRO 296 / 81022 Technical Specification Involved 3.5.B.6 and 3.5.B.7 Reported Under Technical Specification 6.7.2.b(2)

Date of Occurrence 5/11/81 Time of Occurrence 1900 Unit 3

Identification and Description of Occurre nee:

Valve FCV-74-57 motor starter thermal tripped upon opening and closing.

Conditions Prior to Occurrence:

Unit i refueling outage.

Unit 2 at 98%

Unit 3 at 98%

.setion specified in the Technical Specification Surveillance Requirements met due to_ inoperable equipment. Describe.

Required surveillance rcquirements were met.

Apparent Cause of Occurrence:

The bolts which hold the motor together broke.

Analysis of Occurrence:

There was La danger to the health or safety of the public, no release of activity, I

no damage to the plant or equipirent, and no resulting significant chain of events.

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i Corrective Actica:

Bolts and n.otor bearings replaced, motor tested and returned to service.

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Failure _ Data :

None

• Reten tion :

Period - Lifetime; Responsibility - Document Control Supervisor

$ Revision:

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