ML20010E580
| ML20010E580 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 08/25/1981 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Cavanaugh W ARKANSAS POWER & LIGHT CO. |
| References | |
| NUDOCS 8109080001 | |
| Download: ML20010E580 (4) | |
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Mr. William Cavanaugh, III
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.J AUG 2 'T 1981 > T Senior Vice President, Energy Supply Department T
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Little Ruck, Arkansas 72203 0>
Dear Hr. Cavanaugh:
heltem In our letter of May 1980 we recomebbs that you initiate a program to inspect the keyway and bore areas of your low pressure discs for stress corrosion cracking. This action was prompted by the discovery of such cracks in Westinghouse turbines.
So far, the inspection program has covered one or more low pressure rotors at 15 nuclear plants using GE turbines. f!o clear indication of stress corrosion cracking has been discovered, although indications of water cutting and/or erosion have been observed in several turbines.
In view of these findings, we have decided to discontinue the NRR staff monitoring of these inspections, flormal activities of the Office of Inspection and Enforcement will continue of course.
We recommend that you continue to perform disc inspections, as appropriate, and continue to work with General Electric Company to establish safe inspection schedules. Should you find any significant degradation, such as stress corrosion cracking, we would expect you to promptly report it in the normal manner.
Sincerely.
Original signed by.
2bert J. Co nner 4.
Robert A. Clark, Chi f Operating Reactors Brar.ch #3 Division of Licensing cc: See next page 8109080001 010825 PDR ADOCK 05000368 o
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Arkansas Power & Light Company cc:
Mr. David C. Trimble Manager, Licensing Arkansas Power & Light Company P. O. Box 551 Little Rock, Arkansas 72203 U.S. Environmental Protection Agency Mr. James P. O'Hanlon Region VI Office
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General Manager ATTN: Regional Radiation Arkansas Nuc} ear One Representative P. O. Box 608 1201 Elm Street Russellville, Arkansas 72801 Dallis, Texas 75270 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 420 7735 Old Georgetown Road S. L. Smith, Operations Officer Bethesda, Maryland 20014 Arkansas Nuclear Planning &
Response Program Nick Reynolds P. O. Box 1749 c/o DeBevoise & Lioerman Russellville, Arkansas 72801 1200 Seventee' nth Street, N.W.
Washington, D. C.
20036 Arkansas Polytecnnic College Russellville, Arkansas 72501 v.r. Charl es E. 5 ri n(man "anager
.;asrir.g:cn Nuclear Coerations C-E Power Systems 4653 Cordell Avenue, Suite A-1 Bernesda, Maryland 20014 5
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AUG 2 51981 Oocket No. 50-368 Mr. William Cavanaugh, III Senior Vice President, Energy Supply Department Arkansas Power & Light Company P. O. Box 551 Little Rock, Arkansas 72203
Dear Mr. Cavanaugh:
In our letter of May 1980 we recommended that you initiate a program to inspect the keyway and bore areas of your low pressure discs for stress corrosion cracking. This action was prompted by the discovery of such cracks in Westinghocse turbines.
So far, the inspection program has covered one or more low pressure rotors at 15 nuclear plants using GE turbines. No clear indication of stress corrosion cracking has been discovered, although indications of water cutting and/or erosion have been observed in several turbines.
In view of these findings, we have decided to discontinue the NRR staff monitoring of these inspections. Normal activities of the Office of Inspection and Enforcement will continue of course.
We recommend that you continue to perform disc inspections, as appropriate, and continue to work with General Electric Company to establish safe inspection schedules. Should you find any significant degradation, such as stress corrosion cracking, we would expect you to promptly report it in the normal manner.
Sincerely, e-Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing cc: See next page
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Arkansas Power & Light Company cc:
Mr. David C. Trimble Manager, Licensing Arkansas Pcwer & Light Company P. O. Box 551 Little Rock, Arkansas 72203 U.S. Environmental Protection Agency Mr. James P. O'Hanlon Region VI Of'-ice General Manager ATTN:
Regional Radiation Arkansas Nuclear One Representative 1201 Elm Street P. O. Box 608 Russellville, Arkansas 72801 Dallas, Texas 75270 Mr. Robert 3. Sorsum Babcock & Wilcox Nuclear Power Generation Division Suite 420 7735 Old Georgetown Road S. L. Smith, Operations Officer Bethesda, Maryland 20014 Arkansas Nuclear olanning &
Response F cgram Nick Reynolds P. O. Box 1749 c/o DeBevoise & Liberman Russellville, Arkansas 72801 1200 Seventee' nth Street, N.W.
Washington, D. C.
20036 Arkansas Pclytecnnic College Russel,1ville, Arkansas 72601
r. Charles E. Erinkman "anager
.;asningten 'ucisa-Coerations C-E Power Systems 4853 Cordell Avenue, Suite A-1 Bethesda, Maryland 20014 8
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