ML20004D669

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: ML20004D669 ML20004D688
References
P-81148, NUDOCS 8106090635
Download: ML20004D669 (4)

Text

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1. -1 16805 ROAD 19%

1 5 PLATTEVILLE, COLORADO 80651 May 20, 1981 Fort St. Vrain Q h q s

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Unit No. 1 k'>gI"I!I*1 pr"I-

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JUN 0 81981 * ~i U S* Ryms .I

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

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 cc: Director, MIPC 00 )

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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. [

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.

I 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 Prepared By:

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i Asa B. Reed Technical Services Technician i

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Reviewed By:

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/e.T W/Gahm chnical Services Supervisor i

Reviewed By:

Frank M. Mathie Operations Manager Approved By: Ne n . . M Don Warembourg Manager, Nuclear Produ/

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