ML19260D962

Forwards LER 80-005/03L-0

ML19260D962
Person / Time
Site:	Fort Saint Vrain
Issue date:	02/08/1980
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19260D963	List: ML19260D962 ML19260D973
References
P-80022, NUDOCS 8002120675
Download: ML19260D962 (4)

Text

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. public service company o2' cdende 16805 Weld County Road 19 1/2, Platteville, Colorado 80651 February 8,1980 Fort St. Vrain Unit No. 1 P-80022 Mr. Karl V. Seyfrit, Director Nuclear Regulatory Commission Region IV Office of Inspection and Enforcement 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012 Re ference: Facility Operating License No. DPR-34 Docket No. 50-267

Dear Mr. Seyfrit:

Enclosed please find a copy of Reportable Occurrence Report No. 50-267/80-05, Final, submitted per the requirements of Technical Specifi-cation AC 7.5.2(b)2.

Also, please find enclosed one copy of the Licensee Event Report for Reportable Occurrence Report No. 50-267/80-05.

Ve ry t ruly yours ,

b Ww Don Warembourg Manager, Nuclear Production DW/cl's Enclosure 01k cc: Director, MIPC -

Og$ g 1951 312 8002120 .

REPORT DATE: Februarv 8, 1980 REPORTABLE OCCURRENCE 80-05 IS S UE 0 OCCURRENCE DATE: Januarv 11, 1980 Page 1 of 3 FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO 16805 WELD COUNTY ROAD 19 1/2 PLATTEVILLE, COLORADO S0651 REPORT No. 50-267/ 80-05 /03-L-0 FINAL IDENTIFICATION OF OCCURRENCE:

During the period January 11 and 12,1980, a release was made from the gaseous waste holdup system. At this time, the recorder was not operable as required by LCO 4.8.l(d).

This is reportable per Fort St. Vrain Technical Specification AC 7.5.2(b)2.

EVENT DESCRIPTION:

At approximately 1750 hours0.0203 days <br />0.486 hours <br />0.00289 weeks <br />6.65875e-4 months <br /> on January 11, 1980, with the reactor in a shutdown condition, a gas waste release was initiated. Contrary to the requirements of LCO 4.8.l(d), recorder RR-93256 was not operable at this time. Three of the four reactor plant exhaust stack monitors indicate on this recorder. The fourth exhaust stack monitor indicates on a sepa-rate recorder, RR-93254, wnich was operable. At some point on the af ter-noon of January 10, 1980, this recorder became inoperable and all points were printing down scale. However, because the recorder appeared to be printing normally at approximately 1645 hours0.019 days <br />0.457 hours <br />0.00272 weeks <br />6.259225e-4 months <br /> on January 11, 1980, during performance of the gas waste surveillance, a gas waste release was inici-ated later that same day.

Although the recorder again appeared to be indicating correctly early in the morning on January 12, operations personnel later observed that further problems were being experienced with the recorder. At approximately 1037 hours0.012 days <br />0.288 hours <br />0.00171 weeks <br />3.945785e-4 months <br /> en January 12, the gas waste release was completed.

During the period in question, the monitors required by LCO 4.8.1 and RR-93254 were operable. However, the gas waste release was completed with no operable recorder. This recorder being inoperable did not negate the ability of automatic systems to terminate the release had high activity been detected. Review of the gas waste release authorization forms indi-cated that the activity released was well within the limits of 100FR20, Appendix 3.

1951 313 d n,

REPORTABLE OCCURRENCE 80-01 ISSUE O Page 2 of 3 CAUS E DESCRIPTION:

Investigation of the down scale readings on the recorder in question revealed that the problems were a result of bad bull drive gear and clutch assembly.

CORRECTIVE ACTION:

The bull drive gear and clutch assembly were replaced and the recorder re turned to operation.

No further corrective action is anticipated or required.

s 1951 314

REPORTABLE OCCURRENCE 80-05 ISSUE O Page 3 of 3 Prepared By: _ M n// ~

b Cathy C. Hirsch //

Technical Services '"echnician Reviewed By: '

,f  ;. -

f. W. Gahm

', Technical Services Supervisor Reviewed By: V /r I / 3');u Clu , / /_f hj');J' Frank M. Mathie f Operations Manager

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approved By: [~ ) JL <, j:w%

Don Warembourg j Manager, Nuclear Production 1951 315