ML20028A282

Forwards LER 82-041/03L-0.Detailed Event Analysis Encl

ML20028A282
Person / Time
Site:	Fort Saint Vrain
Issue date:	11/10/1982
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Jay Collins NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20028A283	List: ML20028A282 ML20028A286
References
P-82514, NUDOCS 8211180039
Download: ML20028A282 (4)

Text

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public Servlee Company *f OcHorado

. 16805 Road 19 1/2, Platteville, Colorado 80651-9298 November 10, 1982 Fort St. Vrain Unit No. 1 P-82514 r _.

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3 Mr. John T. Collins, Regional Administrator f g j gg U Region IV g Nuclear Regulatory Commission i

-fs) 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011

Reference:

Facility Operating License No. DPR-34 Docket Nc. 50-267

Dear Mr. Collins:

Enclosed please find a copy of Reportable Occurrence Report No. 50-267/82-041, 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. 50-267/82-041.

Ver truly ours, l./ 'X Don Warembourg /

Manager, Nuclear Product on DW/cis y Enclosure D

cc: Director, MIPC k.

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REPORT DATE: November 10, 1982 rep 0RTABLE OCCURRENCE 82-041 ISSUE O OCCURRENCE DATE: October 11. 1982 Page 1 of 3 FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO 16805 WELD COUNTY ROAD 19 1/2 PLATTEVILLE, COLORADO 80651-9298 REPORT NO. 50-267/82-041/03-L-0 Final IDENTIFICATION OF OCCURRENCE:

During the quarterly calibration of the radioactive liquid effluent monitors, the trip setpoint for RIS-6212 was found to be less conservative than required. This is reportable as a degraded mode of LCO 4.8.2(d) per Fort St. Vrain Technical Specification AC 7.5.2(b)2.

EVENT DESCRIPTION:

On October 11, 1982, with the reactor shutdown and depressurized, Results Department personnel performed SR 5.8.2C-Q, the quarterly radioactive liquid effluent activity monitor calibration. The as found trip setpoint of RIS-6212 was out of calibration and may not have terminated a release on high specific activity at the proper setpoint.

Fort St. Vrain Technical Specifications state that all liquid effluent releases from the liquid waste holdup system shall be continuously monitored by two activity monitors and recorded, and equipment shall be operable to automatically terminate the release on high specific activity or low circulating water blowdown flow.

The trip setpoint of the redundant RIS-6213 was within acceptable limits and would have served to terminate a release on high specific activity.

The results of the "before," "during," and "af ter" release effluent sample analyses for the liquid waste release made prior to the performance of the said surveillance test indicated permissible activity concentrations.

CAUSE DESCRIPTION: -

Instrument drift was the cause of the detector being out of calibration.

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A REPORTABLE OCCURRENCE 82-041 ISSUE O Page 2 of 3 1

CORRECTIVE ACTION:

The high voltage and discriminator settings for RIS-6212 were adjusted during calibration to yield the recommended trip point value of 1050 counts per minute.

4 No further corrective action is anticipated or required.

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REPORTABLE OCCURRENCE 82-041 ISSUE O Page 3 of 3 i

Prepared By: 2./ M e- -

Robert A. Dickerson Technical Services Technician Reviewed By: ,/L Charles Fuller -

Technical Services Engi erpngSupervisor

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Reviewed By: 2 EdwinQ',641J1 F V '

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Station Manager Approved By: / SIf# #<"

DonWarembourg 7 V /* "

l Manager, Nuclear Proddction i

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