05000267/LER-1980-068, Forwards LER 80-068/03L-0

Forwards LER 80-068/03L-0

ML19350A124
Person / Time
Site:	Fort Saint Vrain
Issue date:	11/25/1980
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19350A125	List: 05000267/LER-1980-068, Forwards LER 80-068/03L-0 05000267/LER-1980-068-03, /03L-0:on 801105,during Normal operation,480 Volt Switchgear Room Smoke Detectors Were Taken Out of Svc for Approved Mod to Local Alarm Panel.Caused by Disabling of 480 Volt Smoke Detectors.Smoke Detectors Were Returned to S
References
P-80410, NUDOCS 8012020554
Download: ML19350A124 (4)

LER-1980-068, Forwards LER 80-068/03L-0

Event date:
Report date:
2671980068R00 - NRC Website

text

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t-pubne senice company e escetde 16805 ROAD 19%

PLATTEVILLE, COLOR ADO 80651 i

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November 25, 1980 F

Fort St. Vrain t

Unit No. 1 P-80410 l

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.i Mr. Karl V. Seyfrit, Director

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Nuclear Regulatory Commission

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j Region IV t

Of fice of Inspection and Enforcement 611 Ryan Plaza Drive I

Suite 1000 Arlington, Texas 76012 Reference: Facility Operating License No. DPR-34 5

l Docket No. 50-267 i

Dear Mr. Seyfrit:

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

80-68, Final, submitted per the requirements of Technical Specification AC 7.5.2(b)2.

Also, please f'ind enclosed one copy of the Licensee Event Report for Reportable Occurrence' Report No. 50-267/80-68.

Very truly yours, JYs~ 7Nraw.l l

Don Warembourg l

Manager, Nucicar Production DW/cls Enclosure cc: Director, MIPC 007

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l 801 gogo 557 3

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REPORT DATE:

Novenber 25. 1990 REPORTABLE OCCURRENCE 80-68 ISSUE O OCCURRENCE DATE:

November 5. 1930 Page 1 of 3 FORT ST. VRAIN :.1' CLEAR GENERATING STATION PUBLIC SERVICE COBIPANY OF COLORADO 16805 WEIS COUNTY P,0AD 19 1/2 PLATTEVILLE, COLORADO 80651

..EPORT No. 50-267/80-68/03-L-0 Final IDENTIFICATION OF OCCURRENCE:

On Novenber 5,1980, the reactor was operated at power uith less than the specified minimum number of operable smoke detectors required by LCO 4.19.3.

This situaticr. constitutes operation in a degraded mode allowed by LCO 4.10.3 and is reportable per Fort St. Vrain Technical Specification AC 7.3.2(b)2.

EVENT

DESCRIPTION

The local alarm panel f or the 480 Volt Switchgear Room was being modified in accordance with an approved plant modification.

In order to make the modification, it was necessary to remove electrical power from the panel, which in turn made all the 480 Volt Switchgear Room smoke detectors inoper-able. At the time of this event, the reactor was operating at 55" power.

Technical Specification LCO 4.10.3 requires two operable smoke detectors in each :ene of the 480 Volt Switchgear Room when the reactor is at power.

The LCO turther requires hourly inspections of an area with less than the specified minimum number of operrble detectors.

When the 4S0 Volt Switch; ear Room smoke detectors were made inoperable, the hourly inspections were started and continued until the smoke detectors were operable again.

CAUSE

DESCRIPTION:

s The cause of this event was the disabling of the 480 Volt Switchgear Room s=oke detectors while the reactor was at power, placing the plant in a degraded = ode of LCO 4.10.3.

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1 REPORTALLE OCCURRE:CE 80-68 ISSUE O Pas;e 2 of 3 CORRECTIVE ACTION:

An hourly inspection of the area was gonducted as required by LCO 4.10.3.

the seoke detectors were returned to operability tihen the modifiestion was complete.

No further corrective action is anticipated or required.

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T.EPORTABLE OCCUU.E' CE 31-63 ISSUE O Page 3 of 3 Prepared By:

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t Richard R. Frost Technical Sertices Technician

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Reviewed By:

J. W. Gahm

[ Technical Services Supervisor

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Reviewed By:

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Frank M. ?!athie Operations Manager Approved By:

/b 7Jiumd e Jon Warembourg

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Mana:;er, '!uclear '3reducticn