ML19305B366

LER 80-007/03L-0:on 800213,while Performing 10-h Test on Standby Gas Treatment Sys 1,flow Was Less than Tech Spec Limit.Caused by Slipping Drive Belts on Exhaust Fan EF1-8. Drive Belts Replaced

ML19305B366
Person / Time
Site:	Oyster Creek
Issue date:	03/06/1980
From:	Ross D JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19305B337	List: ML19305B336 ML19305B366
References
LER-80-007-03L, LER-80-7-3L, NUDOCS 8003190586
Download: ML19305B366 (3)

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I O I 21 i On February 13, 1980, while cerforming a 10 hour1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> test on Standbv Gas I r5 ry] l Treatment

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455-8784 NAME OF PREPARER

Jersey Central Power & Ught Company

. kh (' Madison Avenue at Punen Bowt Road Mornstown, New Jersey o7960 (201)455-8200 OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 Licensee Event Report Reportable Occurrence No. 50-219/80-7/3L Report Date March 7, 1980 Occurrence Date .

February 13, 1980 Identification of Occurrence Standby Gas Treatment System (SGTS) #1 was found to be operating with a flow less than that prescribed in the Technical Specifications.

This event is considered to be a reportable occurrence as defined in the Techni-cal Specifications, paragraph 6.9.2,(b),(2).

Conditions Prior to Occurrence The plant was shutdown for a refueling / maintenance outage.

The reactor mode switch was locked in refuel.

The reactor cavity was flooded and less than 212*F.

Description of Occurrence On Wednesday, February 13, 1980, at approximately 2130 hours0.0247 days <br />0.592 hours <br />0.00352 weeks <br />8.10465e-4 months <br />, while performing a 10 hour1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> test on SGTS #1, the system flow was observed to be 1350 CFM, which is less than rated capacity of 2600 CFM.

Apparent Cause of Occurrence The reduced system flow was caused by slipping drive belts on exhaust fan EF1-8.

Analysis of Occurrence .

Standby Gas Treatment System is used to process the reactor building atmosphere, should conditions develop which require its functioning, and exhaust it through the plant stack. Despite its degraded condition, SGTS #1 was considered oper-able since only the process rate of the system was affected and not its ability to process. SGTS #2 was available to perform its function at rated system capa-bility. The safety significance of this event is considered minimal, since the {

only concern was a loss of SGTS redundancy at rated system flow. 1 l

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- 1 Jersey Central Power & Ught Company is a Member of the General PucFc Utities System l

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Reportable Occurrence No. 50-219/80-7/3L Page 2 March 7, 1980 Corrective Action SGTS #1 was taken out of service after SGTS #2 was confirmed to be functional at rated system flow, and the subject exhaust fan drive belts were replaced.

Operability tests and filter aP tests were again perfonned to prove the system operable.

Failure Data Not Applicable.