ML20010H903

Forwards LER 81-052/03L-0.Detailed Event Analysis Encl

ML20010H903
Person / Time
Site:	Fort Saint Vrain
Issue date:	09/11/1981
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML20010H904	List: ML20010H903 ML20010H913
References
P-81227, NUDOCS 8109290400
Download: ML20010H903 (4)

Text

-

Public Service Company OcHersde vs ,

September 11, 1981 Fort St. Vrain Unit No. 1 P-81227 RlH@[MO\V/f(N Mr. Karl V. Seyfrit, Director  !- -

4 Nuclear Regulatory Commission !A $@ l 4 $l .i Region IV 2t Office of Inspection and Enforcement - b

611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76L12

Reference:

Facility Operating License No. DPR-34 Docket No. 50-267

Dear Mr. Seyfrit:

Enclosed please find a copy of Reportable Occurrence Report No. 50-267/81-052, Final, submitted per the requirements of Technical Specification AC 7.5.2(b)2.

Also, please find enclosed one copy c' the Licensee Event port for Reportable Occurrence Report No. 50-267/81-052.

Very truly yours, d Trw/

Don Warembourg Manager, Nuclear Production DW/cis _

,DL),i 4>

Enclosure 8 '/ f

't f' o h

~~

cc: Director, MIPC -

+ ?q 9  % CP ( il

\ 2 f)

-r., . gO}i .

_ ~ gy fGS s

I l 8109290400 810911 PDR ADOCK 05000267 S PDR-TEz ?--

. . _ . ~ .

l OCCURRENCE REPORT DISTRIBUTION Number of Copies Department of Energy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 (P Letter)

San Francisco Operations of fica Atta: California Patent Group 1333 Broadway Oakland, California 94612 Dep artmen t o f Ene rgy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 (P Letter)

Mr. Glen A. Newby, Chief HTR Branch Division of Nuclear Power Development Mail Station B-107 Washington, D.C. 20545 Department o f Ene r gy - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 (P Letter)

Attn: Project Manager 110 West A Street. Suite 460 San Diego, California 92101 Mr. Karl V. Seyfrit. Director ------------------------- 1 (original of P Letter Region IV and Copy of LER)

Office of Inspection and Enforcement Nuclear Regulatory Conseission 611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76012 Director - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 (P Letter, LER)

Office of Msnagement Information and Program Control U. S. Nuclear Regulatory Connaission Washington, D.C. 20555 Mr . Ri cit a rd ' Phe lp s - '.~- - - - - - - - - - - - - - - - - - - - - - - - - - - - 10 ' (bginal of FPLG Letter FSV, GA, Site plus Two Copter, One Representative Copy of P Letter One General Atomic Company Copy of LER)

P. O. Box 426 Platteville, Colorado 80651 Mr. Bill Lavalee - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 (P Letter, IIR)

Nuclear Safety Analysis Center 3412 Hillview Avenue P. O. Box 10412 Palo Alto, California 94303 NRC Resident Site Inspector -------------------------- 1 (P Letter, LER) i 1

4 e

______________m__ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ _ _ _ ___________._.-___._._____m__________-___ _ _ _ _ _ _ _ _ _ - . _ . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

7

. .)

1 REPORT DATE: Seotember 11, 1981 REPORTABLE OCCURRENCE 31-052 ISSUE O OCCURRENCE DATE: August 12, 1981 Page 1 of 2 FORT ST. VRAIN NUCLEAR GENERATING STATION PUBLIC SERVICE COMPANY OF COLORADO 16805 WELD COUNTY ROAD 19 1/2 PLATTEVILLE, COLORADO 80651-9298 REPORT NO. 50-267/81-052/03-L-0 Final IDENTIFICATION OF OCCURRENCE:

The standby bearing water makeup pump was taken out of service with the reactor at power. This is a degraaed mode of LCO 4.2.2 and is reportable per Fort St. Vraic Technical Specification AC 7.5.2(b)2.

EVENT DESCRIPTION:

On August 12, 1981, with the reactor operating at 46% thermal power and 150 MWe, a bonnet leak in a valve in the suction line to the standby bearing water makeup pump necessitated the pump be removed from service to repair the valve. The bonnet leak did not, in itself, render the pump inoperable. The standby bearing water makeup pump was uut of service from 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> until 1505 hours0.0174 days <br />0.418 hours <br />0.00249 weeks <br />5.726525e-4 months <br /> on August 12, 1981. Had it been required, the emergency bearing water makeup pump was available for service during this time.

CAUSE DESCRIPTION:

The cause of this event was the removal from service of a bearing water makaup pump with the reactor at power.

CORRECTI;E ACTION:

Upon completion of 'the valve repair, the pump was returned to service.

No further corrective action is anticipated or required.

REPORTABLE OCCURRENCE 81-053 ISSUE O Page 2 of 2 i

Prepared By: vb Yl, V Paul Moore Technical Services Technician Reviewed By: MMMdd Milft McBride Technical Services Manager 1

i Reviewed By:

Edwin 8. Hil1~ v Station Manager Approved By: dF Don Warenbourg y Manager, Nuclear Production

,- . - - , - - , . . .---r., ,, , . . - ..~.,.-.,....--.-,-~.,.,.,--,,,r.~,,.----..+ , , , , , - , - . . .,. , . - - - , , - . , - - . . . . - , . , .