ML20093P092
| ML20093P092 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 10/31/1984 |
| From: | Tucker H DUKE POWER CO. |
| To: | Adensam E, Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8411060128 | |
| Download: ML20093P092 (2) | |
Text
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DUKE POWER GOMPANY NUGLEAR PRODUCTION DEPARTMENT P.O. DOX 03180, 422 MOUTH CHUPCH HTREET CHARLOTTE, N.C. 28242 (704) 37a-4o:1 1
October 31, 1984 Mr. Harold R. Denton, Director Office of Nuclear Regulation U.S. Nuclear Regulatory Commission Washington, D.C.
20555 Attention:
Ms. E.G. Adensam, Chief Licensing Branch No. 4 Regarding:
Catawba Nuclear Station, Unit il Docket No. 50-413, 50-414 Completion of Diesel Generator 1B Return-to-Service Testing l
(
Dear Mr. Denton:
It is our pleasure to inform you that the Catawba Nuclear Station 1B diesel generator has successfully completed the return-to-service testing program described in the Duke Power Company letter to H. R.
Denton, NRC from H. B. Tucker of July 6, 1984.
During that portion of the test which simulated blackout plant conditions, the automatic load sequencer placed all the available loads on the engine in the appropriate manner.
The engine satisfied all the test criteria, with the exception of a spurious (unalarmed) engine trip during the first test run.
After that trip the required blackout tests were performed twice to verify operability.
After the return-to-service testing was completed, an engine control logic device was found to have an air seal which was leaking.
This device pressurizes (arms) the Low Low Pressure Lube Oil trip circuit.
The air leakage prevented the pilot valve from pressurizing the circuit in less than the required 60 seconds.
The defective valve, labeled P n the engine logic diagram, was the cause of the 2
unalarmed engine shutdown.
The valve has been replaced with a tested valve from stock and the engine control logic is now functional.
8411060128 841031 dol PDR ADOCK 05000413 s
PDR p
Page 2, Mr. H. R. Denton, October 31, 1984 If you have any questions or comments, please do not hesitate to call Russell P. Muschick at (704) 373-5875.
Very truly yours,
<t/ b H. B. Tucker, Vice President Nuclear Production HBT RPM:sak cc:
NRC Resident Inspector Catawba Nuclear Station Robert Guild, Esq.
Attorney-at-Law Mr. Jesse L. Riley Carolina Environmental Study Group 854 Henly Place Charlotte, North Carolina 28207 Walt Laity Pacific Northwest Laboratories P.O. Box 999 Battelle Blvd.
Richland, Washington 99352 C. H. Berlinger ONRR, U.S. Nuclear Regulatory Commission Washington, D. C.
20555 j
Melanie A. Miller l
Division of Licensing U. S. Nuclear Regulatory Commission 7920 Norfolk Avenue Bethesda, Maryland 20814 l
l Mr. James P. O'Reilly, Regional Administrator U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Palmetto Alliance l
2135 Devine Street Columbia, South Carolina 29205 i
l l
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