ML041130647
| ML041130647 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 04/28/2004 |
| From: | Anthony Mcmurtray NRC/NRR/DLPM/LPD3 |
| To: | Solymossy J Nuclear Management Co |
| McMurtray A, LPD3-1, 415-4106 | |
| References | |
| TAC MB8471 | |
| Download: ML041130647 (3) | |
Text
April 28, 2004 Mr. Joseph M. Solymossy Site Vice President Prairie Island Nuclear Generating Plant Nuclear Management Company, LLC 1717 Wakonade Drive East Welch, MN 55089
SUBJECT:
PRAIRIE ISLAND NUCLEAR GENERATING PLANT, UNIT 2 - FLAW EVALUATION OF STEAM GENERATOR (#22) AND THE PRESSURIZER DURING THE THIRD 10-YEAR INTERVAL INSERVICE INSPECTION INTERVAL (TAC NO. MB8471)
Dear Mr. Solymossy:
By letter to the U.S. Nuclear Regulatory Commission (NRC) dated April 4, 2003, the Nuclear Management Company, LLC (NMC) (the licensee), submitted their analytical flaw evaluation of 16 indications identified in the tubesheet to channel head weld region of the #22 steam generator, and one indication identified in the pressurizer bottom head to shell weld region.
These indications were identified at Prairie Island Nuclear Generating Plant, Unit 2, in February-March 2002, during refueling outage 21 (RFO-21). The indications were found during follow-up examinations, required by the American Society of Mechanical Engineers (ASME)
Boiler and Pressure Vessel Code (Code),Section XI, paragraph IWB-2420, due to flaws previously identified during the third 10-Year interval inservice inspections. NMC evaluated the indications per ASME Code,Section XI, paragraph IWB-3610, and used WCAP-14166, Handbook on Flaw Evaluation for Prairie Island Units 1 and 2 Steam Generator and Pressurizer.
The NRC staffs review indicated that the flaw evaluation submitted by NMC on April 4, 2003, meets the acceptance criteria of the ASME Code,Section XI, paragraph IWB-3600, based on flaw size. NMC should comply with the successive inspection requirements in the ASME Code,Section XI, paragraph IWB-2420, for the new flaws that were analytically evaluated in their submittal.
This completes the NRC staffs efforts under TAC No. MB8471.
If you have questions or comments, you can contact me at 301-415-4106.
Sincerely,
/RA/
Anthony C. McMurtray, Sr. Project Manager, Section 1, Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-306 cc: See next page
ML041130647 NRR-106 OFFICE PDIII-1/PM PDIII-1/LA EMCB/SC PDIII-1/SC NAME AMcMurtray THarris TChan LRaghavan DATE 04/ 27 /04 04/ 26 /04 04/ 27 /04 04/ 28 /04
Prairie Island Nuclear Generating Plant, Units 1 and 2 cc:
Jonathan Rogoff, Esquire Vice President, Counsel & Secretary Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 Manager, Regulatory Affairs Prairie Island Nuclear Generating Plant Nuclear Management Company, LLC 1717 Wakonade Drive East Welch, MN 55089 Manager - Environmental Protection Division Minnesota Attorney Generals Office 445 Minnesota St., Suite 900 St. Paul, MN 55101-2127 U.S. Nuclear Regulatory Commission Resident Inspector's Office 1719 Wakonade Drive East Welch, MN 55089-9642 Regional Administrator, Region III U.S. Nuclear Regulatory Commission 801 Warrenville Road Lisle, IL 60532-4351 Administrator Goodhue County Courthouse Box 408 Red Wing, MN 55066-0408 Commissioner Minnesota Department of Commerce 121 Seventh Place East Suite 200 St. Paul, MN 55101-2145 Tribal Council Prairie Island Indian Community ATTN: Environmental Department 5636 Sturgeon Lake Road Welch, MN 55089 Nuclear Asset Manager Xcel Energy, Inc.
414 Nicollet Mall, R.S. 8 Minneapolis, MN 55401 John Paul Cowan Executive Vice President & Chief Nuclear Officer Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 Craig G. Anderson Senior Vice President, Group Operations Nuclear Management Company, LLC 700 First Street Hudson, WI 54016 November 2003