ML19290C971

Forwards LER 80-004/03L-0

ML19290C971
Person / Time
Site:	Fort Saint Vrain
Issue date:	02/12/1980
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19290C972	List: ML19290C971 ML19290C977
References
P-80025, NUDOCS 8002150269
Download: ML19290C971 (3)

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\' J February 12, 1980 Fort St. Vrain Unit No. 1 P-80025 Mr. Karl V. Seyfrit, Director Nuclear Regulatory Commission Region IV Of fice 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 Reportahis Occurrence Report No. 50-267/80-04, Final, submitted per the requirements of Technical Specifi-cation AC 7.5.2(b)2.

Also, please find enclosed one copy of the Licensee Event Report for Reportable Occurrence Report No. 50-267/d0-04 Very truly yours,

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Don Warembourg 2 Manager, Nuclear Production DW/cla ec: Director, MIPC pooh

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REPORT DATE: February 12, 1980 REPORTABLE OCCURRENCE 80-04 ISS'JE O OCCURRE'CE DATE: January 14, 1980 _

Page 1 of 2 FORT ST. VRAIN NUCLEAR GENFRATING STATION PUBLIC SERVICE COMPANY ;F COLORADO 16805 WELD COUNTY ROAD 19 1/2 PLATTEVILLE, COLORADO 80651 REPORT NO. 50-267/ 80-04/03-L-0 FINAL IDENTIFICATION OF OCCURRENCE:

During the surveillance interval following the performance of Class I shock suppressors (snubbers) inspection test, two snubbers were determined to be inoperable. The reactor was taken critical for training purposes and this was the only reactor operation which occurred during the surveillance in te rval. However, since LCO 4.3.10 is applicable to all modes of reactor operation, except shutdown or refueling, this is being interpreted as oper-ation under a degraded mode of LCO 4.3.10 and is being reported per Fort St. Vrain Technical Specification AC 7.5.2(b)2.

EVENT DESCRIPTION:

While the reactor was in a shutdown condition, two snubbers were determined to be inoperable.

The hydraulic oil reservoirs on hydraulic oil snubber, HOS-29, and hot reheat snubber, HRS-357, were found below the snubber valves / cylinders.

CAUSE DESCRIPTION:

The rotation of the reservoirs is being attributed to personnel performing work on equipment near the snubbers and using the snubber units as stepping p la tfo rts . This, in turn, caused the lock nuts on the snubbers to loosen and allcwed the reservoirs to rotate.

CORFECTIVE ACTION:

The snubbers were returned to the proper positions.

Surveillance test SR 5.3.8a-x has been revised to include a snubber ori-entation verification.

Personnel have been reminded that plant piping and installations are not to be used in place of ladders in order to gain access to equip =ent.

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REPORTABLE OCCURRENCE 80-04 ISSUE O Page 2 of 2 Prepared By:

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Mich 1 J. Ferris Technic 1 Services gineer Reviewed By: . . .,, /

W.'Gabm echnical Services Supervisor Reviewed By: D h Frank M. Mathie Operations Manager Approved By: 2Mt u..MW Don Warembourg /

Manager, Nuclear Production