ML19350C261

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Forwards LER 81-014/03L-0.Detailed Summary Also Encl
ML19350C261
Person / Time
Site: Fort Saint Vrain Xcel Energy icon.png
Issue date: 03/03/1981
From: Warembourg D
PUBLIC SERVICE CO. OF COLORADO
To: Seyfrit K
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19350C262 List:
References
P-81078, NUDOCS 8103310737
Download: ML19350C261 (5)


Text

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. _ .> PLATTEVILLE, COLORADO 80651 March 3,1981 Fort St. Vrain Unit No. I P-81078 h . -- i\

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4 v s...c cian n e tca' comissa s Mr. Karl V. Seyfrit, Director L'^ ,-

Nuclear Regulatory Comctission ' / \2 c5 Region IV g g ;ig Office of Inspection and Enforcement 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012

Reference:

Facility Operating License No. DPR-34 N cket No. 50-267

Dear Mr. Seyfrit:

Enclosed please find a copy of Reportable Occurrence Report No. 50-267/

81-014, 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. 50-267/81-014.

Very truly yours, Wu u Don Warembourg *

.vanager, Nuclear Production DW/cis Enclosure cc: Director, MIPc 00 1 5

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San Francisco Operations Cf fice Atta: California Patent Group 1333 Broadway Calland, California 94612 l

i le p a r t men t o f Ene r gy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 (P

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epartment o f Ene r gy - - - - - - - - - - - - - - - - - - - - - - - - - - -- 1 (P Letter)

Atta: Profect Manager 110 **est A Street. Suite 463 San 01eBo. California 92101 Mr. Karl v. Seyf rit. Director - - - ---------------------- 1 (Ortainal of ? Letter Region Ii and Copy of LIR)

Office of Inspection and Enforcement suelear Regulatory comission 611 Ryan Plaza Orive Saite 1000 Ar11agton. *exas 7601:

Director-----------*------------------------ 1 (P Letter, LIR)

Office of Management Inforsation and Program Control C. 5. Naclear tagulatery Commission Washington, D.C. 20553 Mr . 11 tn a rd P he lp s FSV, GA, $1te - - - . - - - - - - - - - - - - - - - - - - - - - - - - - - 11 (Or141321 o f r?',G Le t te r Rep rese n tative p i g, ;v, c p t.,, gn, cop, gg p ;,.te r, Cre General Atetic Company P. 3. Sox e26 copy og ;gyy

'latteville, Colorado 80651 Mr . B ill Lava lee - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 (P Letter, LIR)

Nuclear Safety Analysis Caster 34 1: 'fillview Avenw P. O. Sox 10412 Palo Alto, California 94303 KRC Resicent 31te Inspector - - - - ---------------------- 1 (P Letter, LIR)

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REPORT DATE: March 3, 1981 REPORTABLE OCCURRENCE 81-014 ISSUE O OCCURRENCE DATE: Januarv 4, 1981 Page 1 of 3 FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO 16805 WELD COUNTY ROAD 19 1/2 PLATTEVILLE, COLORADO 80651 REPORT No. 50-267/ 81-014/03-L-0 Final IDENTIFICATION OF OCCURRENCE:

During normal operation, while 1A instrument air compressor was cleared out

^ for maintenance,1C instrument air compressor tripped leaving only IB instru-ment air compressor in service.

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

Vrain Technical Specification AC 7.5.2(b)2.

2 EVENT DESCRIPTION:

At 2030 hours0.0235 days <br />0.564 hours <br />0.00336 weeks <br />7.72415e-4 months <br /> on February 4,1981, while operating at 65% thermal power and 199 Mi(e),1C instrument air compressor tripped on high discharge air temp-erature. Since 1A instrument air compressor was cleared out at this time for af ter-cooler maintenance, only 1B instrument air compressor was operable.

LCO 4.3.6 requires at least two instrument air compressors to be operable during power operation.

Plant operations personnel checked the compressor, increased the cooling wa'.er flow by opening the temperature control valve bypass, and returned the air compressor to service.

-Repairs to lA instrument air compressor were completed, and the unit returned to service at 1910 hours0.0221 days <br />0.531 hours <br />0.00316 weeks <br />7.26755e-4 months <br /> on February 5,1981.

CAUSE DESCRIPTION:

-lC instrume.nt air compressor tripped on high discharge air temperature due to fouling of . the cooling water jacket. The fouling is a continuous process and- requires periodic cleaning o' the cooling water jacket. As fouling in-creases, the cooling wate : temperature con".rol valve bypass is opened to admit extra service water to the compressor until a point is reached when cleaning is required.

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REPORTA3LE OCCURRI';CE 81-014 ISSUE O Page 2 of 3 CAUSE DESCRIPTION:

lA instrument air co:npressor was cleared out at this time for tube repairs of its after-cooler.

CORRECTIVE ACTION:

i The plant operators inspected the air compressor, increased the cooling water flow by opening the bypass, and returned IC instru:nent air ccaressor to service.

lA -instrument air cc:npressor af ter-cooler repair was completed, and the air compressor returned to service the following day, February 5,1981.

On February 23,1981, with 1A- and 13 insert: ment air co= pressor in servie.e, IC instrument air cc= pressor was taken out of service for inspection and cleaning of the after-cooler.

No further corrective action is anticipated or required.

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, REPORTABLE OCCUR.EICE 81-014 ISSCE O Page 3 of 3 Prepared By:

Asa B. Reed Technical Services Technician Reviewed By: .

J Ay Gahm

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chnical Services Supervisor Reviewed By: 6 M, /7/hYdie I fOity" Frank M. Mathie //

Operations Managee Approved By: / -

44-4 A m j Don Warembourg /

Manager, Nuclear Production

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