ML20008F710

Forwards LER 81-018/03L-0.Detailed Event Analysis Encl

ML20008F710
Person / Time
Site:	Fort Saint Vrain
Issue date:	03/12/1981
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20008F711	List: ML20008F710 ML20008F713
References
P-81094, NUDOCS 8104210526
Download: ML20008F710 (6)

Text

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) public service company of conomde 16805 ROAD 19%

PLATTEVILLE, COLORADO 80651 March 12, 1981 Fort S t. Vrain Unit No. 1 ,

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Mr. Karl V. Seyfrit, Director g' D& , ,h /

Nuclear Regul.atory Commission :s Region IV Office of Inspection and Enforcement f

rn' '-/p) 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/

81-018, 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. 50-267/81-018.

Very truly yours, f

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• Don Warembourg Manager, Nuclear Production DW/cls Enclosure 003 cc: Director, MIPc s

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REPORT DATE: March 12. 1981 REPORTABLE OCCURRENCE 81-018 ISSUE O OCCURRENCE DATE: Feb ruary 14, 1981 Page 1 of 4 FORT ST. VRAIN NUCLEAR f'ENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO '

16805 WELD COUNTY ROAD 191/2 PLATTEVILLE, COLORADO 80651 REPORT NO. 50-267/81-018/03-L-0 Final IDENTIFICATION OF OCCURRENCE:

During performance of a scheduled Surveillance Test, the sample flow alam setpoints of three dewpoint moisture monitors were found outside the limits specified by LCO 4.4.1, Table 4.4-1, note (t). This event constitutes oper-ation in a degraded mode of LCO 4.4.1 and is reportable per Fort St. Vrain Technical Spa:ification AC 7.5.2(b)2.

EVENT DESCRIPTION:

While operating at 69% thermal power and 220 !N(e), plant instrument per-sonnel performed the primary c.oolant moisture instrumentation sample flow alarm functional test, SR 5.4.1.1.6e-M. The test verifies that each of the eight dewpoint moisture monitors will alarm on low and high sample flow.

The limiting condition for operation LCO 4.4.1, Table 4.4-1, note (t) speci-l fies that a dewpoint moisture monitor shall not be considered operable unless the sa=ple flow is alarmed as follows:

l a) A fixed low sample flow alarm set at 1 sec/sec.

b) A fixed high sample flow alarm set at 75 sec/sec.

c) A variable icw sample flow alarm set at 1 to 50 sec/sec as a function of reactor power level.

During performance of the Surveillance Test, two fixed low sample flow alarm setpoints were found below the 1 sec/sec limit, two fixed high sample flow alarm setpoints were found above the 75 sec/see limit, and one variable low sample flow alarm setpoint was found below the 50 sec/sec limit required by the reactor power level at the time the surveillance was performed. Three dewpoint moisture monitors were involved - one high level monitor and one loop monitor in each loop. The actual setpoints found are shown for these three moisture montiors in Table 1.

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REPORTABLE OCCURRENCE 81-018 ISSUE O Page 2 of 4 T.GLE 1 Fixed Low Variable Low Fixed High .

Moisture Monitor 1 sec/see Alarm 50 sec/sec Alarm 75.sec/see Alarm Monitor Loop Found At Found At Found At h 1117 Loop 1 0.25 sec/sec* 51.7 77.56*

h il19 High 1.36 sec/sec 46.04* 81.86*

Level h 1122 Loop 2 0.25 sec/see* 51.2 73.0

• These values were outside the acceptance criteria.

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PIPORTABLE OCCURRENCE 81-018 -

ISSUE O Page 3 of 4 CAUSE DESCRIPTION: .

The cause of this event was misadjustment of the alarm setpoints se some time in the past. It has not been possible to determine the time the mis- -

adjustmsut occurred or what person was responsible.

CORRECTIVE ACTION:

The alarm setpoints were re-adjusted to the correct value and the Surveil-lance Test completed satisfactorily.

All Results personnel have been informed by memo that unauthori::ed ad-justments are not permitted, and that adjustments may caly be saade within the limits of LCO 4.4.1.

No further corrective action is anticipated or required.

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REPORTABLE OCCURRENCE 81-018 ISSUE O Page 4 of 4 Prepared By: ( , AF Richard R. Frost Technical Services Technician Revieved By: [ p

// W,A;aha Viechnical Services Supervisor Revteved By: $/t) /l'),T//, ; .b jh)?yV Frank M. Mathie /

Operaticas Manager l

l Approved By: <-~ Mude Don Ware = bourg g Manager, Nuclear Production i

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