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