ML071430641
| ML071430641 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 05/22/2007 |
| From: | Howell A NRC/RGN-IV/DRP |
| To: | Minahan S Nebraska Public Power District (NPPD) |
| References | |
| Download: ML071430641 (5) | |
Text
May 22, 2007 Stewart B. Minahan President-Nuclear and CNO Nebraska Public Power District 72676 648A Avenue Brownville, NE 68321
SUBJECT:
ASSESSMENT FOLLOWUP LETTER - COOPER NUCLEAR STATION
Dear Mr. Minahan:
On May 4, 2007, the NRC staff completed a quarterly review of Cooper Nuclear Station. The assessment evaluated the performance indicators and inspection results for the first quarter of calendar year 2007. The purpose of this letter is to inform you of our assessment of your safety performance during this period and our plans for a future inspection at your facility.
Overall, Cooper Nuclear Station operated in a manner that preserved the publics health and safety and fully met the cornerstone objectives. Plant performance for the most recent quarter of the assessment cycle was within the Regulatory Response Column of the NRCs Action Matrix based on the Mitigating Systems Performance Index for Emergency AC Power System crossing the threshold from Green to White in the first quarter of calendar year 2007. All inspection findings for the assessment period indicated performance at a level requiring no additional NRC oversight (Green).
Specific events that contributed to the Emergency AC Power System Performance Indicator crossing the Green/White threshold included: (1) on December 30, 2004, Emergency Diesel Generator 1 failed during a monthly surveillance test because of a failed lube oil sensing line; (2) on February 7, 2005, Emergency Diesel Generator 1 failed during a sequential loading test because of a diode failure that resulted in the loss of 125 Volt DC control power; and (3) on January 18, 2007, Emergency Diesel Generator 2 failed because of a faulty voltage regulator card.
As a result of the White Performance Indicator we plan to conduct a supplemental inspection using Inspection Procedure 95001, ?Inspection for One or Two White Inputs In a Strategic Performance Area during the week of September 10, 2007. This inspection procedure is conducted to provide assurance that the root causes and contributing causes of risk significant performance issues are understood, the extent of condition and cause are identified, and the corrective actions are sufficient to prevent recurrence.
In accordance with 10 CFR 2.390 of the NRC's "Rules of Practice," a copy of this letter will be made available electronically for public inspection in the NRC Public Document Room or from the Publicly Available Records (PARS) component of NRCs document system (ADAMS).
ADAMS is accessible from the NRC Web site at http://www.nrc.gov/reading-rm/adams.html (the Public Electronic Reading Room).
Nebraska Public Power District Please contact Michael C. Hay at 817/860-8144 with any questions you have regarding this letter.
Sincerely,
/RA/
Arthur T. Howell III, Director Division of Reactor Projects Docket: 50-298 License: DPR-46 cc:
Gene Mace Nuclear Asset Manager Nebraska Public Power District P.O. Box 98 Brownville, NE 68321 John C. McClure, Vice President and General Counsel Nebraska Public Power District P.O. Box 499 Columbus, NE 68602-0499 P. V. Fleming, Licensing Manager Nebraska Public Power District P.O. Box 98 Brownville, NE 68321 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
Nebraska Public Power District Julia Schmitt, Manager Radiation Control Program Nebraska Health & Human Services Dept. of Regulation & Licensing Division of Public Health Assurance 301 Centennial Mall, South P.O. Box 95007 Lincoln, NE 68509-5007 H. Floyd Gilzow Deputy Director for Policy Missouri Department of Natural Resources P. O. Box 176 Jefferson City, MO 65102-0176 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 Daniel K. McGhee, State Liaison Officer Bureau of Radiological Health Iowa Department of Public Health Lucas State Office Building, 5th Floor 321 East 12th Street Des Moines, IA 50319 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 Ronald D. Asche, President and Chief Executive Officer Nebraska Public Power District 1414 15th Street Columbus, NE 68601
Nebraska Public Power District Kevin V. Chambliss, Director of Nuclear Safety Assurance Nebraska Public Power District P.O. Box 98 Brownville, NE 68321 John F. McCann, Director, Licensing Entergy Nuclear Northeast Entergy Nuclear Operations, Inc.
440 Hamilton Avenue White Plains, NY 10601-1813 Keith G. Henke, Planner Division of Community and Public Health Office of Emergency Coordination 930 Wildwood, P.O. Box 570 Jefferson City, MO 65102
Nebraska Public Power District Electronic distribution by RIV:
Regional Administrator (BSM1)
DRP Director (ATH)
DRS Director (DDC)
DRS Deputy Director (RJC1)
Senior Resident Inspector (NHT)
Branch Chief, DRP/C (MCH2)
Senior Project Engineer, DRP/C (WCW)
Team Leader, DRP/TSS (CJP)
RITS Coordinator (MSH3)
OE:EA File (RidsOeMailCenter)
SUNSI Review Completed: _WCW__ ADAMS: : Yes G No Initials: _WCW____
- Publicly Available G Non-Publicly Available G Sensitive : Non-Sensitive R:\_REACTORS\CNS\2007\CNS assessment followup letter.wpd RIV:SPE:DRP\C C:DRP/C D:DRP WCWalker;mjs MCHay ATHowell
/RA/ /RA/ /RA/
5/16/07 5/16/07 5/22/07 OFFICIAL RECORD COPY T=Telephone E=E-mail F=Fax