ML080590170
| ML080590170 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 03/03/2008 |
| From: | Lyon C NRC/NRR/ADRO/DORL/LPLIV |
| To: | Minahan S Nebraska Public Power District (NPPD) |
| Lyon C Fred, NRR/DORL/LPL4, 301-415-2296 | |
| References | |
| TAC MD8025 | |
| Download: ML080590170 (5) | |
Text
March 3, 2008 Mr. Stewart B. Minahan Vice President-Nuclear and CNO Nebraska Public Power District 72676 648A Avenue Brownville, NE 68321
SUBJECT:
COOPER NUCLEAR STATION - REQUEST FOR ADDITIONAL INFORMATION RE: RELIEF REQUEST RI-35 (TAC NO. MD8025)
Dear Mr. Minahan:
By application dated January 30, 2008, Nebraska Public Power District (NPPD, the licensee) requested the U.S. Nuclear Regulatory Commission (NRC) staff authorization to use an alternative to certain inservice inspection code requirements for the Cooper Nuclear Station.
Specifically, Relief Request RI-35 proposed alternatives to the dissimilar metal weld repair requirements of Section XI of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code.
The NRC staff has reviewed the information provided in your submittal and determined that additional information is required in order to complete its review. Please provide a response to the enclosed questions by March 21, 2008.
The NRC staff considers that timely responses to requests for additional information help ensure sufficient time is available for staff review and contribute toward the NRCs goal of efficient and effective use of staff resources. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-2296.
Sincerely,
/RA/
Carl F. Lyon, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-298
Enclosure:
Request for Additional Information cc w/encl: See next page
(*)memo dated OFFICE NRR/LPL4/PM NRR/LPL4/LA CVIB/BC NRR/LPL4/BC NAME FLyon JBurkhardt MMitchell (*)
THiltz DATE 3/3/08 3/3/08 2/20/08 3/3/08
Cooper Nuclear Station (09/2007) cc:
Mr. Ronald D. Asche President and Chief Executive Officer Nebraska Public Power District 1414 15th Street Columbus, NE 68601 Mr. Gene Mace Nuclear Asset Manager Nebraska Public Power District P.O. Box 98 Brownville, NE 68321 Mr. John C. McClure Vice President and General Counsel Nebraska Public Power District P.O. Box 499 Columbus, NE 68602-0499 Mr. David Van Der Kamp Licensing Manager Nebraska Public Power District P.O. Box 98 Brownville, NE 68321 Mr. Michael J. Linder, Director Nebraska Department of Environmental Quality P.O. Box 98922 Lincoln, NE 68509-8922 Chairman Nemaha County Board of Commissioners Nemaha County Courthouse 1824 N Street Auburn, NE 68305 Ms. Julia Schmitt, Manager Radiation Control Program Nebraska Health & Human Services R & L Public Health Assurance 301 Centennial Mall, South P.O. Box 95007 Lincoln, NE 68509-5007 Mr. H. Floyd Gilzow Deputy Director for Policy Missouri Department of Natural Resources P.O. Box 176 Jefferson City, MO 65102-0176 Senior Resident Inspector U.S. Nuclear Regulatory Commission P.O. Box 218 Brownville, NE 68321 Regional Administrator, Region IV U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011 Director, Missouri State Emergency Management Agency P.O. Box 116 Jefferson City, MO 65102-0116 Chief, Radiation and Asbestos Control Section Kansas Department of Health and Environment Bureau of Air and Radiation 1000 SW Jackson Suite 310 Topeka, KS 66612-1366 Ms. Melanie Rasmussen Radiation Control Program Director Bureau of Radiological Health Iowa Department of Public Health Lucas State Office Building, 5th Floor 321 East 12th Street Des Moines, IA 50319 Mr. Keith G. Henke, Planner Division of Community and Public Health Office of Emergency Coordination 930 Wildwood P.O. Box 570 Jefferson City, MO 65102 Mr. Paul V. Fleming, Director of Nuclear Safety Assurance Nebraska Public Power District P.O. Box 98 Brownville, NE 68321 Mr. John F. McCann, Director Licensing, Entergy Nuclear Northeast Entergy Nuclear Operations, Inc.
440 Hamilton Avenue White Plains, NY 10601-1813
OFFICE OF NUCLEAR REACTOR REGULATION REQUEST FOR ADDITIONAL INFORMATION RELATED TO RELIEF REQUEST RI-35 NEBRASKA PUBLIC POWER DISTRICT COOPER NUCLEAR STATION DOCKET NO. 50-298 The Nuclear Regulatory Commission (NRC) staff has reviewed the Nebraska Public Power District (the licensee) request for alternative RI-35 for the Cooper Nuclear Station and has determined that additional information is necessary to complete the review of its request for relief. Based on the staff=s review, please provide a response which addresses the following request for additional information (RAI) questions.
- 1.
The licensee has stated that the weld overlay of the dissimilar metal welds may require welding on more than 100 square inches of surface on the steel base material. The NRC does not normally approve any request wherein the actual area of the carbon or low-alloy steel material that will be welded on is over 300 square inches. What is the specific maximum area of the carbon or low-alloy steel material where the weld overlay will be applied? This should be stated in Relief Request RI-35 for each component to be overlaid. The relief request mentions 500 square inches, but not as the maximum that is to be welded on during this welding.
- 2.
Provide the American Society of Mechanical Engineers SA or American Society for Testing and Materials material and grade or class of materials for each component to be overlaid.
- 3.
Code Case N-638-4 is shown in the relief request as a basis for the design of the full structural weld overlay on page 4 of the relief request. It is also used as part of the basis for exceeding the 100-square-inch limitation. This code case has not been reviewed and accepted by the NRC. Therefore, please provide a response which removes references to the unapproved Code Case N-638-4 and provides an acceptable basis for your request.
- 4.
The relief request states that full ultrasonic examination of the final weld surface and band area (1.5T width) will not be performed. How much of the final weld surface and band area will be examined using the ultrasonic method for each component shown on page 1 of the relief request?
- 5.
Since full ultrasonic examination of the final weld surface and band area (1.5T width) as required by Code Case N-638-1 will not be performed, a much more complete explanation of the examinations that will be performed and the basis for these alternative examinations is required.