05000267/LER-1976-036, Forwards LER 76-036/03L-0

Forwards LER 76-036/03L-0

ML19253B563
Person / Time
Site:	Fort Saint Vrain
Issue date:	10/10/1979
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19253B564	List: 05000267/LER-1976-036, Forwards LER 76-036/03L-0 05000267/LER-1979-036-03, /03L-0:on 790910,cold Reheat Snubber CRS-262 Inoperable W/Reactor in Shutdown Condition.Caused by Missing Pin That Kept Snubber from Being Properly Attached to Pipe. New Pin Fabricated & Installed.Snubber Returned to Svc
References
NUDOCS 7910160409
Download: ML19253B563 (4)

LER-1976-036, Forwards LER 76-036/03L-0

Event date:
Report date:
2671976036R00 - NRC Website

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public service ponmany e cdondo 16805 Weld County Road 19 J./2, Platteville, Colorado 80651 October 10, 1979 Fort St. Vrain Unit No. 1 P-79230 Mr. Karl V. Seyfrit, Director Nuclear Regulatory Con =:ission Region IV Office of Inspection and Enforcement 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012 REF: Facility Operating License No. DPR-34 Docket No. 50-267

Dear Mr. Seyfrit:

Enclosed please find a copy of Reportable Occurrence Report No. 50-267/79-36/03-L-0, 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/ 79-36/03-L-0.

Very truly yours, NE Don Warembourg Manager, Nuclear Production DW/alk cc: Director, MIPC 1154 139

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REPORT DATE:

October 10, 1979 REPORTABLE OCCURRENCE 79-36

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ISSUE O OCCURRENCE DATE:

Seotemb er 10, 1979 Page 1 of 3 FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO P. O. BOX 363 PLATIEVILLS, COLORADO 80631 REPORT No. 50-267/79-36/03-L-0 Final IDENTIFICATION OF OCCURRENCE:

On September 10, 1979, witn the reactor in a shutdown condition, engineering personnel observed that cold reheat snubber CRS-262 was inoperable.

Since the reactor had been operated at power during the surveillance interval, this constitutes operation in a degraded mode of LCO 4.3.10, and is reportable per Fort St. Vrain Technical Specification AC 7.5.2(b)2.

EVENT

DESCRIPTION

On September 10, 1979, with the reactor in a shutdown condition, engineering personnel o'., served that the pin at the piston rod eye of cold rcheat snubber CRS-262 was missing. See details of Figure 1.

Pecause this pin was missing, the snubber was not properly attac' ed to the pipe, and was therefore inoperable. This snubber had been verified operable per approved surveillance procedure during the refueling shutdown.

CAUSE

DESCRIPTION:

Prior to startup following the first refueling, this snubber was operable.

There appears to be no cause for this missing pin traceable to plant opera-tion.

CORRECTIVE ACTION:

A new pin was fabricated and installed and the snubber was returned to service.

The present surveillance interval is 12 months + 25%. No change is required as a result of this occurrence.

No further corrective action is anticipated or required.

l!54 140

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REPORTAPT.E OCCURRENCE 79-36 ISSUE O Page 3 of 3 Prepared by:

Cathy C.fCollard Technical Services Technician Reviewed by:

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/ Technical Services Supervisor Reviewed by:

Frank M. Mathia Operations Manager Approved by:

g b MuA/ M Don Warembourg g

Manager, Nuclear Production 1154 142