ML052710295
| ML052710295 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 10/06/2005 |
| From: | Mahesh Chawla NRC/NRR/DLPM/LPD3 |
| To: | Thomas J. Palmisano Nuclear Management Co |
| Chawla M, NRR/DLPM, 415-8371 | |
| References | |
| TAC MC6261 | |
| Download: ML052710295 (3) | |
Text
October 6, 2005 Mr. Thomas J. Palmisano Site Vice President Prairie Island Nuclear Generating Plant Nuclear Management Company, LLC 1717 Wakonade Drive East Welch, MN 55089
SUBJECT:
PRAIRIE ISLAND UNIT 1 -
SUMMARY
OF NRCS REVIEW OF STEAM GENERATOR TUBE PRE-SERVICE BASELINE INSPECTION RESULTS FOR THE REPLACEMENT STEAM GENERATORS (TAC NO. MC6261)
Dear Mr. Palmisano:
By letters dated February 22, 2005 (ML050910245) and August 22, 2005 (ML052340676), you submitted information pertaining to the steam generator tube pre-service baseline inspection results for the Prairie Island Nuclear Generating Plant Unit 1 replacement steam generators.
Prairie Island Unit 1 has two Framatome ANP Model 56/19 recirculating steam generators.
There are 4,868 Inconel 690 thermally-treated tubes in each steam generator. The tubes have an outside diameter of 0.750-inch, a wall thickness of 0.043-inch, and are supported by stainless steel tube support plates with quatrefoil shaped holes. The tubes were hydraulically expanded throughout the entire tubesheet depth. All tubes in rows 1 through 9 were stress relieved after bending. You provided the scope, extent, methods and results of the steam generator tube inspections in your letters dated February 22, and August 22, 2005. In addition, you stated that there were no tubes plugged prior to and during the installation of the replacement steam generators.
Based on a review of the information provided, the Nuclear Regulatory Commission staff concludes that there are no technical issues that warrant follow-up action at this time since the inspections appear to be consistent with the objective of detecting potential tube degradation and the inspection results appear to be consistent with industry operating experience at similarly designed and operated units. If you have any further questions, please contact me at 301-415-8371.
Sincerely,
/RA/
Mahesh L. Chawla, Project Manager, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-282 cc w/encl: See next page
October 6, 2005 Mr. Thomas J. Palmisano Site Vice President Prairie Island Nuclear Generating Plant Nuclear Management Company, LLC 1717 Wakonade Drive East Welch, MN 55089
SUBJECT:
PRAIRIE ISLAND UNIT 1 -
SUMMARY
OF NRCS REVIEW OF STEAM GENERATOR TUBE PRE-SERVICE BASELINE INSPECTION RESULTS FOR THE REPLACEMENT STEAM GENERATORS (TAC NO. MC6261)
Dear Mr. Palmisano:
By letters dated February 22, 2005 (ML050910245) and August 22, 2005 (ML052340676), you submitted information pertaining to the steam generator tube pre-service baseline inspection results for the Prairie Island Nuclear Generating Plant Unit 1 replacement steam generators.
Prairie Island Unit 1 has two Framatome ANP Model 56/19 recirculating steam generators.
There are 4,868 Inconel 690 thermally-treated tubes in each steam generator. The tubes have an outside diameter of 0.750-inch, a wall thickness of 0.043-inch, and are supported by stainless steel tube support plates with quatrefoil shaped holes. The tubes were hydraulically expanded throughout the entire tubesheet depth. All tubes in rows 1 through 9 were stress relieved after bending. You provided the scope, extent, methods and results of the steam generator tube inspections in your letters dated February 22, and August 22, 2005. In addition, you stated that there were no tubes plugged prior to and during the installation of the replacement steam generators.
Based on a review of the information provided, the Nuclear Regulatory Commission staff concludes that there are no technical issues that warrant follow-up action at this time since the inspections appear to be consistent with the objective of detecting potential tube degradation and the inspection results appear to be consistent with industry operating experience at similarly designed and operated units. If you have any further questions, please contact me at 301-415-8371.
Sincerely,
/RA/
Mahesh L. Chawla, Project Manager, Section 1 Project Directorate III Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-282 cc w/encl: See next page DISTRIBUTION:
PUBLIC OGC PDIII-1 R/F ACRS LRaghavan MChawla GHill(2)
THarris RSkowkowski, RGN-III ADAMS Accession Number: ML052710295 OFFICE PDIII-1/PM PDIII-1/LA EMCB:SC PDIII-1/SC NAME MChawla THarris LLund LRaghavan DATE 10/6/05 10/6/05 10/5/05 10/6/05 OFFICIAL RECORD COPY
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 85 7th Place East, Suite 500 St. Paul, MN 55101-2198 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