ML17319B049
| ML17319B049 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 09/03/1981 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Dolan J INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| References | |
| NUDOCS 8109160332 | |
| Download: ML17319B049 (3) | |
Text
tQ SPP 031981 Docket No. 50-315 Mr. John Dolan, Yice President Indiana and Michigan Electric Company Post Office Box 18 Bowling Green Station New York, New York 10004
Dear Mr. Dolan:
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PDR TERA NSIC ORB81 Rdg DEisenhut OELD IE-3 ACRS-10 JHeltemes SVarga CParrish SMiner Gray File WRoss In our letter of April 29, 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.
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 yfP as stress corrosion cracking, we would expect you to promptly report it in the normal manner.
Sincerely, cc:
See next page (h iginal signed. ~V.:
S, A. Var@a Steven A. Yarga, Chief Operating Reactors Branch 81 Division of Licensing 8i0'ghi60332 810903 PDR ADGCK 05000315 I
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NRG FORM 318 u0-80) NRCM 0240 OFFjC(AL RECORD COPY 1
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Nr. John Dolan Indi ana and Nichi gan El ectri c Company cc:
hr. Robert W. Jurgensen Chief Huclear Engineer American Electric Power Service Corporati'on 2 Broadway Hew York, Hew York 10004 Gerald Charnoff, Esquire Shaw, Pittman, Potts and Trowbridge 1800 N Street,,
H.W.
llashington, D. C.
20036 Naude Preston Palenske Nemorial Library 500 Narket Street St. Joseph, Nichigan 49085 Nr. D. Shaller, Plant Nanager Donald C.
Cook-HucTear Plant P. 0.
Box 458 Bridgman, Nichigan 49106 U.
S. Huclear Regulatory Commission Resident Inspectors Office 770 Red Arrow Highway Stevensvi lie, Nichigan 49127
'i~'illiam J.
- Scanlon, Esquire 2034 Pauline Boulevard Ann Arbor, Nichig'an 48103 The Honorable Tom Corcoran United States House of Representatives Rashington, D.
C.
20515