ML19323F198

Forwards LER 80-021/03L-0

ML19323F198
Person / Time
Site:	Fort Saint Vrain
Issue date:	05/21/1980
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19323F199	List: ML19323F198 ML19323F200
References
P-80112, NUDOCS 8005280634
Download: ML19323F198 (3)

Text

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Y public service company oe odorado 16805 Weld County Road 191/2, Platteville, Colorado 80651 May 21, 1980 Fort St. Vrain Unit No. 1 P-80112 Mr. Karl V. Seyfrit, Director Nuclear Regulatory Cocnnission 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/

80-21, 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. 50-267/80-21. l Very truly yours, Don Warembourg Manager, Nuclear Production DR/cis Enclosure cc: Director, MIPC l

OF 9% I duosasofjd

REPORT DATE: May 21, 1980 REPORTABLE OCCURRENCE 80-21 ISSUE O OCCURRENCE DATE: Ap ril 21, 1980 Page 1 of 2 FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO 16805 WELD COUNTY ROAD 19 1/2 PLATTEVILLE, COLORADO 80651 REPORT NO. 50-267/80-21/03-L-0 Final IDENTIFICATION OF OCCURRENCE:

One channel of the Plant Protection System's low main steam pressure scram was found inoperable. Since reactor power operation had occurred during the surveillance interval, this is being reported as a degraded mode of LCO 4.4.1, Table 4.4-1, per Fort St. Vrain Technical Specification AC 7.5.2(b)2.

EVENT DESCRIPTION:

On April 21, 1980, with the reactor shutdown, operations personnel performed a weekly alarm light check and found a problem with one of the three channels for the low main steam pressure scram. Instrument personnel investigated the problem and found this one channel to be inoperable. The two redundant chan-nels, which provided the required protection, were available and operable.

CAUSE -

DESCRIPTION:

The inoperable channel was due to a bad connection between the plug-in module and instrument chassis which prevented any signal from passing through or any -

trip from occurring in this channel. The bad connection was the result of dirt or some foreign material on the contact pins.

CORRECTIVE ACTION:

Instrument personnel removed the faulty module, cleaned the contacts, tested the module, and returned it to serv 1ce.

No further corrective action is anticipated or required.

D REPORTABLE OCCURRENCE 80-21 ISSUE O Page 2 of 2 Prepared By:

Asa B. Reed /

Technical Servicp6 Technician Reviewed By: 4

.W/.ahm Technical Services Supervisor I

Reviewed By:

Frank M. Mathie Operations Manager Approved By:

Don Warembourg [/

Manager, Nuclear Production f

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