ML063310245
| ML063310245 | |
| Person / Time | |
|---|---|
| Site: | Point Beach  |
| Issue date: | 11/30/2006 |
| From: | Lyon C NRC/NRR/ADRO/DORL/LPLIII-1 |
| To: | Koehl D Nuclear Management Co |
| F. Lyon LPLE X2296 | |
| References | |
| TAC MC9531 | |
| Download: ML063310245 (4) | |
Text
November 30, 2006 Mr. Dennis L. Koehl Site Vice President Point Beach Nuclear Plant Nuclear Management Company, LLC 6610 Nuclear Road Two Rivers, WI 54241-9516
SUBJECT:
POINT BEACH NUCLEAR PLANT, UNIT 1 - REVIEW OF ANALYTICAL EVALUATION REPORTS FOR THE PRESSURIZER AND STEAM GENERATORS FROM REFUELING OUTAGE U1R29 (TAC NO. MC9531)
Dear Mr. Koehl:
By letter dated December 19, 2005, Nuclear Management Company, LLC (NMC) submitted for U.S. Nuclear Regulatory Commission (NRC) staff review the flaw evaluation reports for the pressurizer and steam generators for Point Beach Nuclear Plant, Unit 1. The flaw indications were discovered by the American Society of Mechanical Engineers (ASME) Code-required ultrasonic examination which was performed in November 2005, during Unit 1s refueling outage U1R29. The characterized flaws are (1) a subsurface flaw of 0.57 inch deep and 0.875 inch long in the pressurizer upper shell to upper head weld, (2) a subsurface flaw of 0.24 inch deep and 11.5 inch long in Steam Generator A upper shell to transition cone weld, and (3) a subsurface flaw of 0.22 inch deep and 1.75 inch long in Steam Generator B upper shell to transition cone weld. NMC demonstrated through flaw evaluations that the pressurizer and steam generators with these flaws can be operated without repair for the remaining life of the plant, including the period of extended operation.
The NRC staff has completed its review of the flaw evaluation methodologies and results, and finds that the subject flaws comply with the rules in Section XI of the ASME Code. With conservatively assumed stresses and transient cycles, the detected flaws in the pressurizer and steam generators will not grow beyond their respective allowable flaw depths at the end of the extended period of operation under the limiting loading condition (normal and upset). Hence, the NRC staff concludes that the flaw evaluation reports for the subject flaws are acceptable.
The ASME Code requires successive inspections at the flaw locations during the next three inspection periods in accordance with Section XI IWB-2420, Successive Inspections.
D. Koehl If you have any questions regarding this matter, please contact me at (301) 415-2296.
Sincerely,
/RA/
Carl F. Lyon, Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-266 cc: See next page
D. Koehl If you have any questions regarding this matter, please contact me at (301) 415-2296.
Sincerely,
/RA/
Carl F. Lyon, Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-266 cc: See next page DISTRIBUTION PUBLIC LPL3-1 R/F RidsAcrsAcnwMailCenter RidsNrrDciCfeb RidsNrrDorlLpl3-1 RidsNrrLATHarris RidsRgn3MailCenter RidsNrrPMFLyon RidsOgcRp RidsNrrDorlDpr CSheng ADAMS Accession Number: ML063310245
- Memo ML063310107 OFFICE LPL3-1/PM LPL3-1/LA CFEB/BC LPL3-1/BC NAME FLyon THarris KGruss*
LRaghavan DATE 11/30/06 11/29/06 11/21/06 11/30/06 OFFICIAL RECORD COPY
Point Beach Nuclear Plant, Units 1 and 2 cc:
Jonathan Rogoff, Esquire Vice President, Counsel & Secretary Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 Mr. F. D. Kuester President & Chief Executive Officer WE Generation 231 West Michigan Street Milwaukee, WI 53201 Regulatory Affairs Manager Point Beach Nuclear Plant Nuclear Management Company, LLC 6610 Nuclear Road Two Rivers, WI 54241 Mr. Ken Duveneck Town Chairman Town of Two Creeks 13017 State Highway 42 Mishicot, WI 54228 Chairman Public Service Commission of Wisconsin P.O. Box 7854 Madison, WI 53707-7854 Regional Administrator, Region III U.S. Nuclear Regulatory Commission Suite 210 2443 Warrenville Road Lisle, IL 60532-4351 Resident Inspector's Office U.S. Nuclear Regulatory Commission 6612 Nuclear Road Two Rivers, WI 54241 Mr. Jeffery Kitsembel Electric Division Public Service Commission of Wisconsin P.O. Box 7854 Madison, WI 53707-7854 Nuclear Asset Manager Wisconsin Electric Power Company 231 West Michigan Street Milwaukee, WI 53201 Michael B. Sellman President and Chief Executive Officer Nuclear Management Company, LLC 700 First Street Hudson, MI 54016 Douglas E. Cooper Senior Vice President - Group Operations Palisades Nuclear Plant Nuclear Management Company, LLC 27780 Blue Star Memorial Highway Covert, MI 49043 Site Director of Operations Nuclear Management Company, LLC 6610 Nuclear Road Two Rivers, WI 54241