ML081220042
| ML081220042 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 05/02/2008 |
| From: | Lyon C NRC/NRR/ADRO/DORL/LPLIV |
| To: | Minahan S Nebraska Public Power District (NPPD) |
| Lyon, C F, NRR/DLPM, 415-2296 | |
| References | |
| TAC MD7385 | |
| Download: ML081220042 (5) | |
Text
May 2, 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: MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE (TAC NO. MD7385)
Dear Mr. Minahan:
By application dated November 19, 2007, as supplemented April 4, 2008, et al., Nebraska Public Power District (NPPD, the licensee) requested the U.S. Nuclear Regulatory Commission (NRC) staff approval of an amendment to the Cooper Nuclear Station facility operating license and technical specifications to increase the rated thermal power from 2381 to 2419 megawatts thermal (1.62 percent increase) based upon increased feedwater flow measurement accuracy to be achieved by using high accuracy ultrasonic flow measurement instrumentation. Your proposal is a measurement uncertainty recapture power uprate.
The NRC staff has reviewed the information provided in your supplement dated April 4, 2008, and determined that additional information is required in order to complete its review. The enclosed questions were discussed with D. Van Der Kamp, et al., of your staff on April 29, 2008.
Please provide a response to the enclosed questions by May 9, 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
(*)vmail dated OFFICE NRR/LPL4/PM NRR/LPL4/LA EICB/BC NRR/LPL4/BC NAME FLyon GLappert IAhmed (*) for WKemper THiltz DATE 5/1/08 5/1/08 4/30/08 5/2/08
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 MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE REQUEST NEBRASKA PUBLIC POWER DISTRICT COOPER NUCLEAR STATION DOCKET NO. 50-298 The following are provided from the Instrumentation and Controls Branch (EICB) as follow-up questions to your April 4, 2008 letter:
- 1. Page 1 of Attachment 6 stated that the originally proposed 9.85% is incorrect, and you will revise the value to 9.84%. It seems that you calculated 10%/1.016 = 9.8425%, and rounded off the value to 9.84%. Since the Rod Worth Minimizer (RWM) blocks erroneous operation of a control rod at low power, should the permissive setpoint be 9.85% instead of 9.84%, to be more conservative?
- 2. In Attachment 1, you stated that the APRM Neutron Flux-High (Flow Biased) is a safety-limit-related limiting safety system setting, but that you would not use the guidance provided in the NRC to NEI letter dated September 7, 2005. The letter provided an acceptable means to the NRC staff of meeting the requirements of 10 CFR 50.36. If you will not use the guidance of the letter, you should provide another means acceptable to the staff, or the staff will be unable to determine that your proposed change meets the regulatory requirements.