ML20040F176
| ML20040F176 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 01/15/1982 |
| From: | Vassallo D Office of Nuclear Reactor Regulation |
| To: | Parris H TENNESSEE VALLEY AUTHORITY |
| References | |
| NUDOCS 8202080415 | |
| Download: ML20040F176 (2) | |
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Docket Hos. 50-259 50-260 50-296 JAN 151982 REC 8VED 9
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JAN 2 219826 $
Mr. Hugh G. Parris 238 mmicase '
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Manager of Power U
Tennessee Valley Authority 4
500A Chestnut Street, Tower II
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Chattanooga, Tennessee 37401
Dear Mr. Parris:
Re: Browns Ferry Plant Units 1, 2, & 3 In our letter of May 16, 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 Westinghouse 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. No Tnal activities of the Office of Inspection and Enforcement will continue of course.
We recommend that you continue to perform disc inpsections, 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, Originalsignegy D. B. Vassagge A Domenic B. Vassallo, Chief 8202080415 820115 Operating Reactors Branch #2 PDR ADOCK 05000259 Division of Licensing Q
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0 Mr. Hugh G. Parris cc:
H. S. Sanger, Jr., Esquire General Counsel Tenneseae. Valley Authority 400 Commerce Avenue E llB 33 C Knoxville, Tennessee 37902 Mr. Ron Rogers Tennessee Valley Authority 400 Chestnut Street, Tower II Chattanooga, Tennessee 37401 Mr. H. N.. Culver
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249A-HBD 400 Commerce Avenue Tennessee Valley Authority Knoxville, Tennessee 37902 Robert !. Sullivan a
U. S. Nuclear Regulatory Commission
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Route 2, Box 311 Athens, Alabama 35611 Athens Public Library
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South and Forrest Athens, Alabama 35611 Mr. John F. Lox Tennessee Valley Authority W9-D 207C 400 Commerce Avenue Knoxville, Tennessee 37902 i
Mr. Herbert Abercrombie Tennessee Valley Authority P. O. Box 2000 Decatur, Alabama 35602 James P. O'Reilly Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303