05000266/LER-1981-018, Forwards LER 81-018/03L-0.Detailed Event Analysis Encl

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

ML20032E667
Person / Time
Site:	Point Beach
Issue date:	11/13/1981
From:	Fay C WISCONSIN ELECTRIC POWER CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20032E668	List: 05000266/LER-1981-018, Forwards LER 81-018/03L-0.Detailed Event Analysis Encl 05000266/LER-1981-018-03, /03L-0:on 811016,while Connecting Wet Pipe Flow Switches Into Emergency Diesel Generator Area Smoke Detection Sys,Wiring Error Caused Sys Supply Fuses to Blow. Caused by Personnel Error
References
NUDOCS 8111200794
Download: ML20032E667 (2)

LER-1981-018, Forwards LER 81-018/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2661981018R00 - NRC Website

text

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1 Wisconsin Electnc men coursur 231 W. MICHIGAN, P.O. BOX 2046, MILWAUKEE, WI 53201 November 13, 1981 to S

Mr. J.

G. Keppler, Regional Director 6

Office of Inspection and Enforcement, f/g

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g Region III

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S Glen Ellyn, Illinois 60137

Dear Mr. Keppler:

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DOCKET NO. 50-266 N~

LICENSEE EVENT REPORT NO. 81-018/03L-0 POINT BEACH NUCLEAR PLANT, UNIT 1 Enclosed is Licensee Event Report No. 81-018/03L-0 (a 30-day report) which provides a description of an event evaluated to be reportable under Technical Specification 15.6.9.2.B.2, " Conditions leading to operation in a degraded mode permitted by a limiting condition for operation or plant shut-down required by a limiting condition for operation".

Very truly yours, C

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C. W. Fay, Director Nuclear Power Department Enclosure Copy to NRC Resident Inspector 1

0111200794 811113 PDR ADOCK 05000266 S

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ATTACHMENT ~TO LICENSEE EVENT REPORT NO. 81-018/03L-0 Wisconsin Electric Power Company Point Beach Nuclear Plant,. Unit 1 Docket No. 50-266 On the night of October 16, 1981, with smoke' detection system out of service for a period of two and one-half. hours, hourly fire watch inspections were not conducted as required.for all zones shown in the Technical l Specifications.

During the event, Unit 1 was shut down for refueling and Unit 2 was operated at rated output.

Jumpers were being installed as a temporary modifica-tion to a mandated fire protection system backfit.

Piping installation was complete for the wet pipe spray system in some vital areas, and in order to make the system temporarily opera-tional, the flow indicators were being wired into the existing smoke detection system.

The diesel area detectors were deenergized' while the hookup took place, and when tested, the system supply fuses were blown due to'a wiring error.

It was believed that only the smoke detectors in the diesel area were affected, and hourly inspections of the diesel rooms were conducted in accordance with the Technical Specifications.

After-the wiring error was corrected and the system returned to service, it was. discovered that the ' entire smoke detection system had been inoperable.

Required inspections in other vital areas had not been conductad because the extent of the ' problem was unknown.

This operation violated Technical Specification 15.6.9.2.B.2 as operation in a degraded mode.

The lack of understanding the scope of the affected areas was the cause for the limited surveillance.

A clear under-standing of which fuses were blown was needed so that appropriate l

compensating action could nave been taken to fulfill the Technical l

Specification requirements.

The review of this report will be used to emphasize the need for clear concise communication.

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