ML19305C032

Forwards LER 80-008/03L-0

ML19305C032
Person / Time
Site:	Fort Saint Vrain
Issue date:	03/19/1980
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19305C033	List: ML19305C032 ML19305C037
References
P-80056, NUDOCS 8003250498
Download: ML19305C032 (4)

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, .. 1 public Service Company 9 OcBendo 16805 Weld County Road 191/2, Platteville, Colorado 80651 I

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1 March 19, 1980 l Fort St. Vrain Unit No. 1 P-80056 Mr. Karl V. Seyfrit, Director Nuclear Regu'.atory Commission Region IV Office of Inspection and Enforcement 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/ ~

80-08, Final, submitted per the requirements of Technical Specification

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AC 7.5.2(b).2.

Also, please find enclosed one copy of the Licensee ?. vent Report for Reportable Occurrence Report No. 50-267/80-08.

Very trdy yours, Wwd Don Warembourg Manager, Nuclear ,?.oduction LM/cis Enclosure ec: Director, MI?C W

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REPORT DATE: March 19,1980 REPORTABLE OCCURRENCE 80-08 ISSUE O OCCURRENCE DATE: Feb ruary 19, 1980 Page 1 of 3 FORT ST. VRAIN NUCLEAR GENERATING STATIJN PUBLIC SERVICE COMPANY OF COLORADO 16805i4 ELD COUNTY ROAD 19 1/2 PLATTEVILLE, COLORADO 80651 l

REPORT No. 50-267/80-08/03-L-0 FINAL IDENTIFICATION OF OCCURRENCE :

On February 19, 1980, with the reactor in a shutdown condition, plant instru-ment personnel performing routine surveillance testing discovered that setpoints for low flow and fixed low / low flow alarms on one dewpoint moisture monitor and for fixed low / low flow on another moisture monitor were less than the minimum acceptable.

Since reactor operation had occurnd since the last successful test com-plation, this constitutes operation in a degraded mode of LCO 4.4.1, and is reportable per Fort St. Vrain Technical Specification AC 7.5.2(b)2.

EVENT DESCRIPTION:

On February 19, 1980, with the reactor in a shutdown condition, plant instru-ment personnel performing the monthly dewpoint moisture monitor (DPMM) sample flow alarm functional test found that the setpoints for the low flow and fixed low / low flow alarm on dewpoint moisture monitor 1122 and for the fixed low / low flow alarm on dawpoint misture monitor 1121 were not with .

in the limits specified id~the'Techafcal Specificatione. 'Refereace Table 1 below for the allowable and actual voltages observed during performance of this test.

TABLE 1 Moisture Low-Low Flow Low Flow Monitor Allowable

• Observed Allowab le* Observed 1121 0.05.-0.17 0.000V N/A N/A (In Spec) (In Spec) 1122 0.05-0.1V 0.000v 0.05-0.1V 0.000v

• Note that at 0.-2% power conditions, the fixed low-low and low flow alarm setpoints are both set for 1 sec/sec.; thus, the allowable voltages are the same.

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REPORTABLE OCCURRENCE 80-08 ISSUE O Page 2 of 3 EVENT DESCRIPTION: (Cont' d)

Technical Specification LCO 4.4.1, Table 4.4-1, note (t) calls out minimum sample flow requirements for an operable dewpoint moisture monitor. The i 1ast verification of alarm setpoint on the affected moisture monitors oc-curred during a test run December 13, 1979. The brief peric "a of reactor operation which have occurred since that verification cont. .ute operation in a degraded mode permitted by LCO 4.4.1.

These sample flow alarm setpoints being out of tolerance would not negate the ability of the monitors to provide a trip input to the plant protective system had a high moisture condition existed.

CAUSE DESCRIPTION:

Moisture monitor flow alarm settings were out of tolerance due to instru-ment calibration drif t.

CORRECTIVE ACTION:

Upon discovery that the flow alarm setpoints were out of tolerance, the setpoints were returned to their proper values and the surveillance test successfully completsd.

The procedure for adjusting flow alarm setpointe at different reactor power levels has been reviewed. Instrument personnel have been instructed to take particular care when adjusting these setpoints to insure that the technique used for adjustments does not induce a setpoint offset.

A Technical Specification change, which establishes minimum sample flow as a function of the interlock sequence switch position, was submitted in our letter, P-77228, dated November 16, 1977.

No further corrective action is anticipated or required.

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REPORTABLE OCCURRENCE 80-08 ISSUE O Page 3 of 3 Prepared By: r b.

Cathy C. Rirsch t)

Technical Services Technician

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Reviewed By: , ,

e Services Superviser Reviewed By:

Frank M. Mathie Operations Manager Approved By: Mo M Don Warembourg g Manager, Nuclear Productron l

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