ML20005B739
| ML20005B739 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 08/17/1981 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Bauer E PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| References | |
| NUDOCS 8109020062 | |
| Download: ML20005B739 (3) | |
Text
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MFairtile Dockets Nos. 50-277/278
]D RIngram TERA Gray File NSIC ORB #4 Rdg fir. Edward G. Bauer, Jr.
DEisenhut Vice President and General Counsel 0 ELD Philadelphia Electric Company IE-3 2301 Market Street ACRS-10 Philadelphia, Pennsylvania 19101
Dear fir. Bauer:
In our letter of flay 1980 we recommended that you initiate a program to inspect the keyway and bore areas of your low pressure discs for stress
- cerosion 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. Normal activities of the Office of Inspection and Enforcement will continue of course.
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'le recorrend 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,
- ORIGIHAL SIG'O B'l J01EiF. STOLTI*
John F. Stolz, Chief Operating Reactors Branch f4 Division of Licensing M
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Dockets Nos. 50-277/278 Mr. Edward G. Bauer, Jr.
Vice President and General Counsel I
Philadelphia Electric Company i
2301 Market Street j
Philadelphia, Pennsylvania 19101 l
Dear Mr. Bauer:
l l
In our letter of May 1980 we recommended that you initiate a program to, inspect the ieyway and bore areas of your low pressure discs for stress i
l corros. ion 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 dacided 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 nomal manner.
Sincerely, b'
John F. Stolz, Chief l
Operating Reactcrs Branch #4 Division of Licensing cc: See next page l
9 Philadelphia Electric Company cc w/ enclosure (s):
Eugene J. Bradley Philadelphia Electric Company Regional Radiation Representative Assistant General Counsel EPA Region III 2301 Market Street Curtis Building (Sixth Floor)
Philadelphia, Pennsylvania 19101 6th and Walnut Streets Philadelphia, Pennsylvania 19106 Troy B. Conner, Jr.
1747 Pennsylvania Avenue, N.W.
M. J. Cooney, Superintendent Washington, D. C.
20006 Generation Division - Nuclear Philadelphia Electric Company Raymond L. Hovis, Esq.
2301 Market Street 35 South Duke Street Philadelphia, Pennsylvania 19101 York, Pennsylvania 17401 Government Publications Section
' Warren K. Rich, Esq.
State Library of Pennsylvania Assistant Attorney General Education Building Department of Natural Resources Commonwealth and Walnut Streets Annapolis, Maryland 21401 Harrisburg, Pennsylvania 17126 Philadelphia Electric Ccmpany ATTN: Mr. W. T. Ullrich Peach Bottom Atomic Power Station Mr. R. A. Heiss, Coordinator Delta, Pennsylvania 17314 Pennsylvania State Clearinghouse Governor's Office of State Planning Albert R. Steel, Chairman and Development Board of Supervisors P. O. Box 1323 Peach Bottom Township Harrisburg, Pennsylvania 17120 R. D. #1 Delta, Pennsylvania 17314 l
l Curt Cowgill l
U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Peach Bottom Atomic Power Station P. O. Box 399 Delta, Pennsylvania 17314 l
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