ML20010E996
| ML20010E996 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 08/27/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Delgeorge L COMMONWEALTH EDISON CO. |
| References | |
| LSO5-81-08-055, LSO5-81-8-55, NUDOCS 8109090248 | |
| Download: ML20010E996 (2) | |
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DISTRIBUTION Do::ket NRCPDR August 27, 1981 Local PDR NSIC TERA ORB Reading Docket No. 50-10/237 DCrutchfield LS05-81-08-055 HSmith P0'Connor ACRS (10)
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Mr. L. De1 George SEPB f
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Post Office Box 767 Chicago, Illinois 60690 7
bear Mr. De1 George:
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SUBJECT:
TURBINE DISC CRACKING (DRESDEN 1/2)
(Task Action No. B-46)
In our letter of liay 1980 we reconnended that you initiate a pro 9 ram to inspect the keyway and bore areas of your low pressure discs for stress corrosion cracking. This action sas prompted by the discovery of such i
cracks in Westinghouse turbines.
r So far, the inspection prcgram has covered one or nore low pressure rotors at 15 nuclear plants using GE turbines. No clear indicatfor, of stress corrosion cracking ha> been discovered, although indications of water cutting and/or erosion have been observed in several turbines.
In view of these ftodings, 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 recomend 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 m
as stress corrosion cracking, we would expect you to promptly report it in the normal manner.
Sincerely.
ORIGINAL SIGNED BY Dennis M. Crutchficid, Chief Operating Reactors Branch #5 Division of Licensing cc: See next page 8109096248 810827 I
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Mr. L. De1 George August 27, 1981 cc Isham, Lincoln & Beale Illinois Department of Nuclear Safety Counselors at law 1035 Outer Park Drive, 5th Floor One First National Plaza, 42nd Floor Springfield, Illinois 62704 Chicago, Illinois 60603 U. S. Environmental Protection Agency Mr. B. B. Stephenson Federal Activities Branch Plant Superintendent Region Y Office Dresden Nuclear Power Station A'TN: Regional Radiation Representative Rural Route #1 230 South Dearborn Street Morris, Illinois 60450 Chicago, Illinois 60604 Dr. Forrest J. Remick Natural Resources Defense Council 305 East Hamilton Avenue 91715th Street, N. W.
State College, Pennsylvania 16801 Washington, D. C.
20005 The Honorabla Tom Corcoran U. S. Nuclear Regulatory Connission
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United States House of Representatives Resident Inspectors Office Washington, D. C.
20515 Dresden Station RR #1 Morris, Illinois 60450 Mary Jo Murray Assistant Attorney General Environmental Control Division 188 W. Randolph Street Suite 2315 Chicago, Illinois 60601 Morris Public Library 604 Liberty Street Morris, Illinois 60451 Chairman Board of Supervisors of Grun@ County Grun@ County Courthouse
~ Morris, Illinois 60450 John F. Wolf, Esquire 3409 Shepherd Street Chevy Chase, Maryland 20015 t
Dr. Linda W. Little 500 Hermitage Drive Raleigh, North Carolina 27612
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