05000259/LER-1982-061-03, /03L-0:on 820826,continuous Air Monitor 1-RM-90-250 Declared Inoperable.Caused by Broken Drive Belt Due to Normal Wear.Drive Belt Replaced

/03L-0:on 820826,continuous Air Monitor 1-RM-90-250 Declared Inoperable.Caused by Broken Drive Belt Due to Normal Wear.Drive Belt Replaced

ML20027B805
Person / Time
Site:	Browns Ferry
Issue date:	09/24/1982
From:	Morkin K TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20027B798	List: 05000259/LER-1982-061, Forwards LER 82-061/03L-0 05000259/LER-1982-061-03, /03L-0:on 820826,continuous Air Monitor 1-RM-90-250 Declared Inoperable.Caused by Broken Drive Belt Due to Normal Wear.Drive Belt Replaced
References
LER-82-061-03L-01, LER-82-61-3L-1, NUDOCS 8209300157
Download: ML20027B805 (2)

LER-1982-061, /03L-0:on 820826,continuous Air Monitor 1-RM-90-250 Declared Inoperable.Caused by Broken Drive Belt Due to Normal Wear.Drive Belt Replaced

Event date:
Report date:
2591982061R03 - NRC Website

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Form BF 17 i

Browns Ferry Nuclear Plant.

BF 15.2 I.'

LER SUPPLEMENTAL INFORMATION i.

1' BFRO-50-- 259 / 82061 Technical Specification Involved. 3.8.B.8 Reported Under Technical Specification 6.7.2.b.(2)* Date Due NRC 09/26/C?,

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Event Narrative:

Unit 1 was operating at 82-percent power.

Unit 2 was in a refueling outage and unit 3 was in cold shutdown. Only unit 1 was affected by the event. During normal operation, the drive belt for the 1-RM-90-250 continuous air monitor-(CAM)

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broke, resulting in a control room alarm. The CAM was declared inoperable at t

0015 hours1.736111e-4 days <br />0.00417 hours <br />2.480159e-5 weeks <br />5.7075e-6 months <br />, and the plant radiochemistry laboratory began the collection of hourly samples per Technical Specification (TS) 3.8.B.8.

The belt drive was replaced and the CAM returned to service at 0316 hours0.00366 days <br />0.0878 hours <br />5.224868e-4 weeks <br />1.20238e-4 months <br />.

Technical Specification 3.8.B.8 requires the reactor and turbine building to be continuously monitored. Even though the 1-RM-90-250 continuous air monitor was inoperable, T.S. 3.8.B.8 requirements were met. Laboratory samples were collected 1

and activity levels were found to be within technical specification limits.

There was no significant release of activity and no damage to the plant or equipment. This event had no effect on public health and safety. There are no redundant systems.

The drive belt failure is considered to have been caused by normal near and no

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further recurrence control is required. The drive belts are' checked periodically as specified by Surveillance Instruction (SI) 4.8.B.4.A.2.

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• Previous Similar Events:

L BFRO-50-296/81063, 81067 L

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?criod - Lifetime; Responsibility - Document Control Supervisor

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