ML20010G313

Forwards LER 81-043/03L-0.Detailed Event Analysis Encl

ML20010G313
Person / Time
Site:	Fort Saint Vrain
Issue date:	08/14/1981
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20010G314	List: ML20010G313 ML20010G318
References
P-810203, NUDOCS 8109150579
Download: ML20010G313 (4)

Text

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CX 8I-public Service Company *f Co2canHo 16805 ROAD 19% i PLATTEVILLE, COLOR ADO 80651 Augus t 14, 1981

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Mr. Karl V. Seyf rit , Director 9 k, Nuclear Regulatory Commission 4f .Q Region IV 47g\ \g Office of Inspection and Enforcement 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012 Re fe ren ce : Facility Operating License No. DP R-34 Docket No. 50-267

Dear Mr. Seyfrit :

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

!81-043, 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 l

Reportable Occurrence Report No. 50-267/81-043.

Very truly yours ,

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Don Warembourg Manager, Nuclear Production DW/cla l

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8109150579 810814 PDR ADOCK 05000267 _

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3 J REPORT DATE: August 14, 1981 REPORTABLE OCCURRENCE 81-043 ISSUE O OCCURRENCE DATE: July 17, 1981 Page 1 of 3 FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE CCMPANY OF COLORADO 16805 WELD COUNTY ROAD 19 1/2 PLATTEVILLE, COLORADO 80651 REPORT NO. 50-267/81-043/03-L-0 Final IDENTIFICATION OF OCCURRENCE:

On two occassions, Class I shock suppressors (snubbers) were found with empty oil reservoirs and were therefore considered inoperable.

This is 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:

Event #1 On July 17, 1981, with the reactor operating at approximately 4%

power, maintenance personnel noticed that snubber BFS-398E oil reservoir mounting bracket was loose and the oil reservoir was empty.

A Plant Trouble Report was issued and the snubber repaired the same day.

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Event #2 On August 7, 1981, with the plant operating at 69.6% power, snubber MSS-149 was found with a leaking piston seal and the oil reservoir empty. A Plant Trouble Report was issued and the snubber repa' red the same day.

CAUSE DESCRIPTION:

Event #1 The loose oil reservoir mounting bracket allowed the oil reservoir piping fitting at the valve block to loosen and oil seeped out of the reservoir.

Event #2 A slight burr on the piston shaft' damaged the piston rod seal and allowed oil to leak out of tne reservoir.

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- o REPORTABLE OCCURRENCE 81-043 ISSUE O Page 2 of 3 CORRECTIVE ACTION:

Event #1 The oil reservoir mounting bracket was re-assembled, and the piping fitting at the valve block tightened. The snubber oil reservoir was filled, the snubber tested, and returned to service.

Event #2 A slight burr was removed from the piston shaft and the piston rod seal replaced. The snubber oil reservoir was filled, the snubber tested, and returned to service.

In accordance with Surveillance Requirement 5.3.8, the surveillance interval has been adjusted to 62 days +25%.

No further corrective action is anticipated or required.

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REPORTABLE OCCURRENCE 81-043 ISSUE O Page 3 of 3 1

Prepared By: d W Paul Moore Technical Services Technician Reviewed By: NdWcgM I L. M. McBride '

Technical Services Manager

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Reviewed By

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Edw1W. 'Hf71 ' '

S+.ation Manager i

Approved By: WMw Don Warembourg Manager, Nuclear Product'f 1on i

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