ML17329A244
| ML17329A244 | |
| Person / Time | |
|---|---|
| Site: | Cook  |
| Issue date: | 10/28/1991 |
| From: | Long W Office of Nuclear Reactor Regulation |
| To: | Fitzpatrick E INDIANA MICHIGAN POWER CO. (FORMERLY INDIANA & MICHIG |
| Shared Package | |
| ML17329A245 | List: |
| References | |
| IEB-88-011, IEB-88-11, TAC-M72125, TAC-M72126, NUDOCS 9111140144 | |
| Download: ML17329A244 (6) | |
Text
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/p ++**4'NITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 October 28, 1991 Docket Nos.
50-315 and 50-316 Hr. E.
E. Fitzpatrick, Yice President Indiana Michigan Power Company c/o American Electric Power Service Corporation 1 Riverside Plaza
- Columbus, Ohio 43216 Dear Hr. Fitzpatrick
SUBJECT:
PRESSURIZER SURGE LINE THERHAL STRATIFICATION, NRC BULLETIN 88-11, DONALD C.
COOK NUCI.EAR PLANT, UNITS 1 AND 2 (TAC NOS.ITtt2125 AND/82126)
The NRC staff and its consultant, Brookhaven National Laboratory, have completed their review of the Westinghouse Owners Group (WOG) report (WCAP-12639) on generic detailed analysis of pressurizer surge line stratification.
The staff concluded that the methodology used to analyze and evaluate the stress and fatigue effects due to thermal stratification and thermal striping was acceptable.
However, for the 43 plants included in the WOG generic analysis, only 15 plants demonstrated acceptable stress and fatigue usage in the surge
'ine.
Although the results" of: the,WOG generic: analys'is.
cannot: be:- used to, satisfy Actions 1.c and 1.d of Bulletin 88-11 for your facility, a copy of our review of WCAP-12639 that was sent to the WOG is being provided for your information.
The Safety Evaluation provides some gu.idance for the 28 Westinghouse. plants that could not be shown acceptable by the WOG generic analysis.
By letter dated Harch 19, 1991, you submitted a plant specific structural analysis (WCAP-12850) for the Donald C.
Cook Nuclear Plant, Units 1 and 2 as required by the, enclosure.
The analysis provides the basis for a conclusion that'your:facilities conform.to.the..requirements. of ASHE Code. Section-III, including both stress limits and fatigue usage, for 32 Effective Full Power Years of operation of each unit.
The displacements and support loadings for the surge line were verified and found acceptable.
No need for modifications to plant piping, procedures, or operational practices was indicated.
The submittal of the plant specific analysis satisfies Item 1.d of Bulletin 88-11.
Therefore, Bulletin 88-11 is considered complete to your facilities.
As stated in Item 3 of the Bulletin, your analyses as well as supporting records and documentation...should be,.appropriately. maintained. for. audit purposes..
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fir. E. E. Fitzpatrick October 28, 1991 If you have any questions regarding this action, please contact W. Long at (301) 492-3026 or T. Colburn at (301) 492-1341.
Sincerely, Original signed by William 0. Long, Sr. Project Manager Project Directorate III-1 Division of Reactor Projects III/IV/V Office of Nuclear Reactor Regulation
Enclosure:
As stated cc: w/enclosure:
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Mr. E. E. fitzpatri c k Indiana Michigan Power Company Donald C.
Cook Nuclear Plant CC:
Regional Administrator, Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Attorney General Department of Attorney General 525 West Ottawa Street Lansing, Michigan 48913 Township Supervisor Lake Township Hall Post Office Box 818 Bridgman",. Michigan'9106" Al Blind, Plant Manager Donald C.,Cook Nuclear Plant Post Office Box 458 Bridgman, Michigan 49106 U.S. Nuclear Regulatory Commission Resident Inspectors Office 7700 Red Arrow Highway Stevensvi lie, Michigan 49127 Gerald Charnoff, Esquire Shaw, Pittman, Potts and Trowbridge 2300 N Street, N.W.,
Washington, DC 20037 Mayor, City of Bridgman Post Office Box 366 Bridgman, Michigan 49106 Special. 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 3500 N. Logan, Street Post Office Box 30035"...
Lansing;-Michigan 48909-'.
Mr. S. Brewer American Electric Power Service Corporation 1 Riverside Plaza-
- Columbus, Ohio 43216