05000267/LER-1980-044, Forwards LER 80-044/03L-0

Forwards LER 80-044/03L-0

ML19338D653
Person / Time
Site:	Fort Saint Vrain
Issue date:	09/15/1980
From:	Warembourg D PUBLIC SERVICE CO. OF COLORADO
To:	Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19338D654	List: 05000267/LER-1980-044, Forwards LER 80-044/03L-0 05000267/LER-1980-044-03, /03L-0:on 800816,while Operating at 30% Power, Boiler Feed Pump a Was Removed from Svc Due to Unstable Governor Controls.Boiler Feed Pump B Was Out of Svc Also. Caused by Governor Worm Gear Being Loose on Shaft
References
P-80315, NUDOCS 8009230608
Download: ML19338D653 (4)

LER-1980-044, Forwards LER 80-044/03L-0

Event date:
Report date:
2671980044R00 - NRC Website

text

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public Service Company *2 Cdonde l

j 16805 ROAD 19%

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.. _?n_J PLATTEVILLE, COLOR ADO 80651 September 15, 1980 Fort St. Vrain Unit No. 1 P-80315

>fr. Karl V. Seyfrit, Director Nuclear Regulatory Commission Region IV Office 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 lir. Seyfrit:

Enclosed please find a copy of Repertable Occurrence Report Nc. 50-267/

80-44, 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 fer Reportable Occurrence Report No. 50-267/80-44.

Very truly yours, lYo-h5 i

Don Warembourg

>fanager, Nuclear Production DW/cis Enclosure ec: Director,l!IPC Y

Nhi 8009230(Q%

REPORT DATE:

September 15, 1980 REPORTABLE OCCliRRENCE 80-44 ISSUE O OCCURRENCE DATE:

August 16, 1980 Page 1 of 3 FORT ST. VRAIN NUCLEUt GENERATING STATION PUBLIC SERVICE COMPA!T! 0F COLORADO 16305 WELD COUNTY ROAD 19 1/2.

PLATTEVILLE, COLORADO 80651 REPORT NO. 50-267/80-44/03-L-0 Final IDENTIFICATION OF 4

OCCURRENCE:

On August 16, 1980, the reactor was being operated at power with "B" boiler feedpump out of service due to valve leakage. Iroblems were subsequently experienced with "A" boiler feedpump governor and speed control.

This is being reported as a degraded mode of LCO 4.3.2 per Fort St. Vrain Technical Specification AC 7.5.2(b)2.

EVENT

DESCRIPTION

At 0110 hours0.00127 days <br />0.0306 hours <br />1.818783e-4 weeks <br />4.1855e-5 months <br /> on August-16, 1980, with the plant operating at approxi=ately i

30% thermal power and 60 MUe, "A" boiler feedpump was taken off line to in-vestigate proble=s with governor and speed control. Control instability had been observed at 0050 hour5.787037e-4 days <br />0.0139 hours <br />8.267196e-5 weeks <br />1.9025e-5 months <br />, and a load decrease was initiated at that time as a precautionary measure.

The "B" boiler feedpump was out of service due to leakage at the discharge check valve, and the auxiliary boiler had been placed in service as required by LCO 4.3.2.

Following the removal of "A" boiler feedpump from service, operators initiated an investigation to determine the source of the control problems with "A" boiler feedpump in an attempt to return it to service prior to the 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> time period in which a plant shutdown would be required.

By 0515 hours0.00596 days <br />0.143 hours <br />8.515212e-4 weeks <br />1.959575e-4 months <br /> on August 16, the problem with "A" boiler feedpump controls still had not been resolved. However, the reactor had been shutdown as a prudent measure due to leakage in the hydraulic oil system. With the plant shutdown, requirements of LCO 4.3.2 tor boiler feedpump operability are no longer applicable.

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4 REPORTABLE OCCURRENCE 80-44 ISSUE O Pa ge 2 o f. 3

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CAUSE

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DESCRIPTION

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The problem with "A" boiler feedpump governor control instability was t

determined to be the result of the governor vorm drive gear being loose on the shaft.

I CORRECTIVE i

ACTION:

1 The governor worm drive gear is being remachined and the shaf t is to be sent l

off-site for metal spraying.

No further corrective action is anticipated or required.

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REPORTABLE OCCU2RENCE 80-44 ISSUE O Page 3 of 3

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Prepared By:

i u-/.. _ t : M.. ; e [_.

Cathy C. Hirsch Technical Services Technician t

I Reviewed By:

MWs1/-

. W.'Gahm echnical Services Supervisor Reviewed By:

)24-k N Frank M. Mathie Operations Manager i

Approved Sy:

$ct e s. Aun

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Don Warembourg

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j Manager, Nuclear Production i

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