ML20084U662
| ML20084U662 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 06/01/1973 |
| From: | Gerald Williams TENNESSEE VALLEY AUTHORITY |
| To: | Kruesi F US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20084U431 | List: |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, NUDOCS 8306290166 | |
| Download: ML20084U662 (1) | |
Text
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O TENNESSEE VALLEY AUTHORITY M CHA'ITANDOGA, TENNESSEE i 37401 L
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$NIS5UNE
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June 1, 1973
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}'~(f JH A v' Mr. F. E. Kruesi, Director K
Directorate of Regulatory Operations U.S. Atemic Energy Commission Washington, DC 205h5
Dear Mr. Kruesi:
On May h, 1973, TVA made initial report to AEC-DRO Inspector W. S. Little of the failure of the governor on Browns Ferr" Nuclear Plant unit 1 emergency diesel-generator B.
In accordance with paragraph 50.55(e) of 10 CFR 50, we submit the following formal report of the failure.
On February 28, 1973, diesel-generator B was found to be unstable when paralleled to the system. The instability decreased some-what when the load was increased, but the load could not be raised above 1200 kW; rated continuous load capacity of the unit is 2600 kW.
A defective Zener diode was located in the power supply of the governor and replaced. The unit was run again on March 16, 1973; the problem persisted. The governor was then replaced with one from one of the other diesel-generator units. Diesel-generator B then performed satisfactorily. A replacement governor was obtained and installed. The unit operated satisfactorily with the replace-ment governor on April 2,1973 The defective governor was returned to the Woodward Governor Company on April 2h,1973.
The governor is a type EG-A.
The engine is a General Motors E!D-GM Model 999-20.
Woodward has been requested to furnish information as to the exact nature of the failure. We expect to receive this information in time to provide a final report of the incident by July 31, 1973.
Very truly yours,
.w t.b. L hic G
j, Godwin Williams, Jr.
/
Assistant Manager of Power CC:
Mr. Norman C. Moseley, Director i
Directorate of Regulatory Operations U.S. Atomic Energy Commission Region II - Suite 818 230 Peachtree Street, NW.
Atlanta, Georgia 30303 8306290166 740617 PDR ADOCK 05000259 i
S PDR l
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