ML20052G410

Forwards LER 82-012/03L-0.Detailed Event Analysis Encl

ML20052G410
Person / Time
Site:	Fort Saint Vrain
Issue date:	05/10/1982
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20052G411	List: ML20052G410 ML20052G415
References
P-82136, NUDOCS 8205180337
Download: ML20052G410 (4)

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% public Service Company *F Cdende

, 1- s 16805 Road 19 1/2, Platteville, Colorado 80651-9298 N

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Mr. John T. Collins, Regional Administrator '

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• I Nuclear Regulatory Co mission 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011

Reference:

Facility Operating License No. DPR-34 Docket No. 50-267

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Dear Mr. Collins:

Enclosed please find a copy _ of Reportable Occurrence Report m- - No. 50-267/82-012, Final, submitted per the requirements of Technical Specification AC 7.5.2(b)2.

Also, please find enclosed one copy of the Licensee Event Report for Reportable Occurrence Report No. 50-267/82-012.

- Very truly yours, fVEuu.~ h

- Don Warembourg Manager, Nuclear Prod.uction DW/cls r -

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l{ 'g cc: Director, MIPC 'N s '. s

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REPORT DATE: May 10, 1982 REPCRTABLE CCCURRENCE 82-012 ISSUE O CCCURRENCE DATE: Aeril 10, 1982 Page 1 of 3 FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLCRADO 16805 WELO COUNTY ROAD 19 1/2 PLATTEVILLE, COLCRADO 80651-9298 l REPORT NO. 50-267/82-012/03-L-0 Final IDENTIFICATION OF OCCURRENCE:

J During reutine startup operations, with 1A instrument air compressor out of service for maintenance, 1C instrument air compressor was L temporarily taken out of service to repair an after-cooler leak.

l This is a degraded mode of LCO 4.3.6 and is reportable per Fort St.

Vrain Technical Specification AC 7.5.2(b)2.

EVENT i DESCRIPTION:

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' On April 10, 1982, at approximately 0230 hours0.00266 days <br />0.0639 hours <br />3.80291e-4 weeks <br />8.7515e-5 months <br />, it was necessary to take 1C instrument air compressor (C-8203) out of service in order to repair a water leak on the after-cooler section. Prior to this occurrence, IA instrtment air compressor (C-8201)' had been taken out of service for repair; therefore, only the standby instrument air

? compressor (C-8201S) was operating, and supplying air to both "A" and "B" ir.strument air headers.

LCO 4.3.6 requires at least two instrument air compressors, their associated air receivers, and two main air headers be operable during power operation; therefore, during the 35 minute time period required to repair the water leak on 1C instrument air compressor, the plant operated in a degraded mode of LCO 4.3.6.

The service air compressor (C-8202) was also operating and capable of supplying either "A" or "B" instrument air headers, if required.

CAUSE DESCRIPTION:

3 A water leak on the after-cooler of IC instrument air compressor 1 (reouired that the compressor be taken out of service for repair. The l / after-cooler is 'used to cool tne air after compression to within j f s 10 degrees fahrenheit of the service water supply temperature and

thereby condense moisture. The repair required approximately

- f, 15 minutes time before tne compressor was again operable.

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REPORTABLE CCCURRENCE S2-012 ISSUE O Page 2 cf 3 CORRECTIVE ACTION:

The after-ccoler water leak was repaired and 1C instrument air compressor was returned to an operable status.

No further corrective action is anticipated or required.

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4 REPORTABLE OCCURRENCE 82-012 ISSUE O Page 3 of 3 I

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' Prepared By: //_O_m_

Robert A. Dickerson Technical Services Technician Reviewed By: [bdd [/[<

i Charles Fuller Technical Services Engineering Supervisor t

Reviewed By: ((/M M Ecwin 0. Hill f/

Station Manager Approved By: Fv l

Don warembourg g Manager, Nuclear Prodi(tion i

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