ML20010E871
| ML20010E871 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 08/27/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Counsil W NORTHEAST NUCLEAR ENERGY CO. |
| References | |
| LSO5-81-08-56, LSO5-81-8-56, NUDOCS 8109080412 | |
| Download: ML20010E871 (2) | |
Text
%
4 1
August 27, 1981 DISTRIBURION Docket NRC PDR Local PDr NSIC Docket No. 50-245 TERA LS05-81-08-056 DCrutchfield HSmith ORB Reading MD s
JShea L
Mr. W. G. Counsil Vice President ACRS (10)
C' h
th h Nuclear Engineering and Operations OELD Northeast Nuclear Energy Company OI&E (3) i2 SEP g D.
Post Office Box 270 SEPB b '
~
Hartford, Connecticut 06101 WRoss DisD:
~
~
Dear fir. Counsil:
f f
SUBJECT:
TURBINE DISC CRACKING (MILLSTONE UNIT 1)
(Task Action No. B-46)
In our letter of May 1980 we recomended 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 nonitoring 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, ORIGINAL SIGNED BY Dennis M. Crutchfield, Chief Operating Reactors Branch e5 Division of Licensing cc: See next page 0109080412 810827 PDR ADOCK 05000245 0
5 omce>
........g
,,, ie1c D,,,,,h,7 8,
sua mi > $.5h,g,a,;,c,,,, g
...S & f[.'. '....f(/.
om >
- uc ronu m pm Nncu om OFFICIAL RECORD COPY usa mi. wm
e Mr. W. G. Counsil August 27, 1961 CC William H. Cuddy, Esquire Connecticut Energy Agency Day, Berry & Howard ATTN: Assistant Director Counselors at Law Research and Policy One Constitution Plaza Development Hartford, Connecticut 06103 Department of Planning and Energy Policy Natural Resources Defense Council 20 Grand Street 91715th Street, N. W.
Hartfo,rd, Connecticut 06106 Washington, D. C.
20005 Northeast Nuc1 car Energy Company ATTN: Superintcodent Millstone Plant P. O. Box 128 Waterford, Connecticut 06385 Mr. Richard T. Laudenat Manager, Generation Facilities Licensing Northeast Utilities Service Company.
P. O. Box 270 Hartford, Connecticut 06101 Resident Inspector c/o U. S. NRC P. O. Box Drawer KK Niantic, Connecticut 06357 Waterford Public Library Rope Ferry Road, Route 156 Waterford, Connecticut 06385 First Selectman of the Town of Waterford Hall of Records 200 Boston Post Road Waterford, Connecticut 06385 John F. Opeka Systems Superintendent Northeast Utilities Service Company P. O. Box 270 Hartford, Connecticut 06101
(
U. S. Environmental Protection Agency Region 1 Office ic ATTN: EIS COORDINATOR s.'
JFK Federal Building Boston, Massachusetts 02203