ML17332A707
| ML17332A707 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 03/31/1995 |
| From: | John Hickman NRC (Affiliation Not Assigned) |
| To: | Fitzpatrick E AMERICAN ELECTRIC POWER SERVICE CORP., INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| Shared Package | |
| ML17332A708 | List: |
| References | |
| TAC-M90712, NUDOCS 9504050168 | |
| Download: ML17332A707 (3) | |
Text
March 31, 1995 Mr. E.
E. Fitzpatric
'ce President Indiana Michigan Pow ompany c/o American Electric Power Service Corporation 1 Riverside Plaza
- Columbus, Ohio 43215
SUBJECT:
DONALD C.
COOK NUCLEAR PLANT, UNIT NO.
2 REACTOR VESSEL HEAD PENETRATION CRACKS (TAC NO. H90712)
Dear Hr. Fitzpatrick:
By letter dated October 26,
- 1994, you submitted your control rod drive mechanism (CROM) reactor vessel head penetration assessment related to three cracks which were found in a CROM penetration on Cook Unit 2 during an inspection in October 1994.
The staff has completed its review of the submittal.
You had Westinghouse Electric Corporation conduct an analysis of the cracks and concluded that the cracks were bounded by an earlier analysis conducted by Westinghouse as reported to the NRC in WCAP-13565, "Alloy 600 Reactor Vessel Head Adaptor Tube Cracking Safety Evaluation."
In addition, you had Westinghouse calculate the amount of crack extension that would occur by the end of the next operating cycle and determined that the cracks would still be bounded by the WCAP-13565 safety evaluation.
Based on the information submitted, the NRC staff has concluded that the submittal is acceptable.
The flaws observed in the CROM penetration are smaller than the criteria proposed by NUHARC (now the Nuclear Energy Institute).
The crack growth projections are conservative based on laboratory data and field experience.
The flaws are not expected to exceed the NUHARC flaw size criteria by the end of the next operating cycle.
Therefore, Indiana Michigan Power Company can operate the plant until the next refueling outage.
The enclosed safety evaluation provides the details of our evaluation.
Should you have any questions, please contact me at (301) 415-3017.
Sincerely, ORIGINAL SIGNED BY Docket No. 50-316
Enclosure:
Safety Evaluation John B. Hickman, Project Manager Project Directorate III-1 Division of Reactor Projects - III/IV Office of Nuclear Reactor Regulation CD CD C:3 cc w/encl.:
See next page DISTRIBUTION Docket File C. Carpenter ACRS(4)
PUBLIC J.
Hickman OGC PDIII-1 Rdg File C. Jamerson J.
A. Davis E.
Adensam C. Miller J.
Hannon W. Kropp, RIII To receive a copy of this document, indicate in the box:
"C" = Copy without attachment/enclosure "E" = Copy with attachment/enclosure "N" = No copy DOCUMENT NAME:
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WPDOCS DCCOOK C090712.LTR OFFICE NAME DATE LA:PD31 CJamerson 8 /3o/95 6
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/95 9504050168 950331 PDR ADOCK 05000316 P
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Mr. E.
E. Fitzpatrick Indiana Michigan Power Company cc~
Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, Illinois 60532-4351 Attorney General Depart<vent of Attorney General 525 West Ottawa Street Lansing, Michigan 48913 Township Supervisor Lake Township Hall Post Office Box 818 Br idgman, Michigan 49106 Al Blind, Plant Manager Donald 'C. Cook Nuclear Plant, Post Office Box 458 Bridgman, Michigan 49106 U.S. Nuclear Regulatory Commission Resident Inspector Office 7700 Red Arrow Highway Stevensville, Michigan 49127 Gerald Charnoff, Esquire
- Shaw, P'i'ttman,,Potts and Trowbridge 2309 N Street, N.
W.
Washington, DC 20037 Mayor, iCity.of'Bridgman Post Office Box 366 Bridgman, Michigan 49106 Specia'3 Assistant to the Governor Room 1
State Capitol Lansing, Michigan 48909 Nuclear 'Facilities and Environmental Monitoring Section Office Division of Radiological Health Department of Public Health 3423 N. Logan Street P. 0. Box 30195 Lansing lMichigan;48909 Donald C.
Cook Nuclear Plant Mr. S.
Brewer American Electric Power Service Corporation I Riverside Plaza
- Columbus, Ohio 43215 Mr. John Willis, Coordinator Nuclear Campaign Greenpeace International 1436 U Street NW Washington, DC 20009