05000267/LER-1981-029, Forwards LER 81-029/03L-0.Detailed Event Analysis Encl

Forwards LER 81-029/03L-0.Detailed Event Analysis Encl

ML20004D669
Person / Time
Site:	Fort Saint Vrain
Issue date:	05/20/1981
From:	Gahm J, Reed A, Warembourg C, Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20004D670	List: 05000267/LER-1981-029, Forwards LER 81-029/03L-0.Detailed Event Analysis Encl 05000267/LER-1981-029-03, /03L-0:on 810420,1D Emergency Diesel Engine of 1B Emergency Generator Set Failed Weekly 50% Load Test. Caused by Failed Injector 1.Injector & Precombustion Chamber Replaced & Generator Returned to Svc
References
P-81148, NUDOCS 8106090635
Download: ML20004D669 (4)

LER-1981-029, Forwards LER 81-029/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2671981029R00 - NRC Website

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Unit No. 1

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Mr. Karl V. Seyfrit, Director M.I;Q' Nuclear Regulatory Commission

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Region IV Office of Inspection and Enforcenent 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012 Reference: Facility Operating License No. DPR-34 Docket No. 50-267

Dear Mr. Seyfrit:

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

81-029, 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. 50-267/81-029.

Very truly yours,

- ?Y Don Warembourg Manager, Nuclear Production DW/cis Enclosure 00 )

cc: Director, MIPC y

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8106090 e5 6

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w REPORT DATE:

May 20. 1981 REPORTABLE OCCURRENCE 81-029 ISSUE O OCCURRENCE DATE:

Aoril 20. 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 i

REPORT NO. 50-267/81-029/03-L 0 Final IDENTIFICATION OF OCCURRENCE:

The 1D emergency diesel of 1B emergency generator set failed the weekly 50% load test.

This is raportable per For: S t.

Vrain Technical Specification AC 7.5.2(b)2 as a degraded mode of LCO 4.6.ld.

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EVENT

DESCRIPTION

p April 20, 1981 while op-rating at 50% thermal power and 170 W electrical power, the weekly emergency diesel generator 50% load test was conducted.

The surveillance for lA emergency generator set was completed satisfactorily.

The operator secured 1A emergency generator set and started testing on 1B emergency generator set.

Approximately 10 minutes before the two hour test period was completed, the operator checked the 1B emergency generator set and found it operr. Ling properly.

About five minutes later, the operator received a call from a security ' guard, who had observed an oil mist in the IB emergency diesel generator room.

The operator returned to the 13 emergency generator room and secured thc.

diesel generator set.

Upon examining the diesel engines, he discovered a fuel leak on //l injector of 1D diesel engine.

Maintenance personnel were called to repair the leaking fuel line and found the injector had failed and was jammed in the precombustion chamber.

The entire injector precombustion chamber was removed and replaced.

The a

emergency diesel generator set was retested and found satisfactory on April 23 1981, and'then returned to service.

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CAUSE

l DESCRIPTod:

The cause of this occurrence was a failed fuel injector.

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A REPORTABLE OCCURRENCE 81-029 ISSUE O Page 2 of 3 CORRECTIVE ACTICN:

The fuel injector and precombustion chamber were replaced.

The emergency generator set was retested and returned to service.

No further corrective action is anticipated or required.

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REPORTABLE OCCURRENCE 81-029 ISSUE 0 Page 3 of 3 I

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Prepared By:

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Asa B. Reed Technical Services Technician i

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Reviewed By:

/e. W/Gahm l

T chnical Services Supervisor i

Reviewed By:

Frank M. Mathie Operations Manager Approved By:

Ne n.. M Manager, Nuclear Produ/

Don Warembourg ction l