ML20010A155

Forwards LER 81-041/03L-0.Detailed Event Analysis Encl

ML20010A155
Person / Time
Site:	Fort Saint Vrain
Issue date:	07/16/1981
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20010A156	List: ML20010A155 ML20010A160
References
P-81190, NUDOCS 8108110124
Download: ML20010A155 (3)

Text

_ . _ _ _ _ . _ _ _ - . - - _ _ _ _ _ - _ . _ _ _

puhuc service company e conende 16805 ROAD 19%

PLATTEVILLE, COLOR ADO 80651 July 16,1981 Fort St. Vrain Unit No. 1 P-81190

\W- tr u 6' $y i Mr. Karl V. Seyf rit, Director 2

$_ 99 -

Nuclear Regulatory Commission d ,';G\ gQ ~ gc# E, Region IV Office of Inspection and Enforcement gj\

. L'- *g .

,jesf 611 Ryan Plaza Drive N j, > N Suite 1000 .I[j ~

Arlington, Texas 76012 Reference : Facility Operating License No. DPR-34 Docket No. 50-267 De st Mr. Seyfrit:

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

81-041, 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. 50-267/81-041.

Very truly yours, ,

/,

Don Warembourg Manager, Nuclear Production DW/cls Enclosure g cc: Director, FEPC 5

)i 8108110124 810716 PDR ADOCK 05000267 l[ 1 s PDR.c./

. )

REPORT DATE: July 16, 1981 REPORTABLE OCCURRENCE 81-041 ISSUE 0 CCCURRENCE DATE: Juna 16, 1981 Page 1 of 2 FORTST.VRAINNUCLEARGENERATkNGSTATION PUBLIC SERVICE COMPANY OF COLORADO 16805 WELD COUNTY ROAD 19 1/2 PLATTE7ILLE, COLORADO 80651 REPORT NO. 50-267/81-041/03-L-0 Final IDENTIFICATION OF OCCURRENCE:

Ouring a fire drill, it was discovered that a damper in the Three Room Control Complex HVAC system would not close. This is a degraded mode of LCO 4.10.1 and is reportable per Fort St. Vrain Technical Specification AC 7.5.2(b)2.

EVENT DESCRIPTION:

On June 16, 1981, during a plant refueling shutdown period, operations personnel conducting a fire drill in the Control Room placed the Three Poom Control Complex HVAC system mode switch in the test position to check damper positions. They observed that the Control Room kitchen and bathroom exhaust damper did not close as required. Failure of this damper to close would impair the abili ty to maintain a Halon atmosphere in the Control Room in the ev6.+ che -

Halon fire suppression system were activated. Although the reactor was shutdown when the failure was found, reactor operation had taken place since surveillance testing was last completed on the Three Reom Control Complex HVAC system.

. CAUSE

! DESCRIPTION:

The Control Room kitchen and bathroom exhaust damper was stuck in the open position. A visual inspection of this damper and two others indicated some accumulation of dust on the damper vanes.

CORRECTIVE ACTION:

The damper handjack was used to free and exercise the damper. When retested, the damper operated properly.

I l A preventive maintenance program will be developed to inspect and clean the damper vanes on a regular basis.

l No further corrective action is anticipated or required.

I l

l REPORTABLE OCCURRENCE 81-041 ISSUE 0 Page 2 of 2 Prepared By: da./

Paul Moore Technical Services Technician Reviewed By: h p.9 L. M./$carTc'e 0 TechnMal Services Manager

/

l Reviewed By: / // -

EditVD. Rill Operations Manager t

Approved By: k M / W/Mgv,

l Doif warem'coury/ 'r' i Manager, Nucle'ar Production l

__