ML061300112

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Cooper Nuclear Station, Meeting Summary of NPPD Meeting Tornado Concerns
ML061300112
Person / Time
Site: Cooper Entergy icon.png
Issue date: 05/12/2006
From: Brian Benney
Plant Licensing Branch III-2
To:
Benney B, NRR/DLPM, 415-3764
Shared Package
ML06120077 List:
References
TAC MC8236
Download: ML061300112 (5)


Text

May 12, 2006 LICENSEE: Nebraska Public Power District (NPPD)

FACILITY: Cooper Nuclear Station (CNS)

SUBJECT:

SUMMARY

OF MAY 5, 2006, MEETING WITH NPPD ON CNS TORNADO CONCERNS (TAC NO. MC8236)

On May 5, 2006, a Category 1 public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of NPPD at the NRC Headquarters, One White Flint North, 11555 Rockville Pike, Rockville, Maryland. The purpose of the meeting was to discuss concerns related to the design of components and systems inside the diesel generator (DG) building and their ability to withstand tornado pressurization loads. The concerns were identified and documented as an unresolved item in a Safety System Design and Performance Capability inspection conducted in May 2005. The licensee presented its venting analysis of the DG building and discussed its calculations that demonstrated the structural adequacy of the heating, ventilation, and air conditioning ducting during depressurization and repressurization phases of the tornado event.

The NRC staff determined that there was not an immediate safety concern for components inside the DG building at CNS. However, the NRC staff still intends to look at this on a generic basis. The NRC staff felt that the alternate calculation performed was reasonable and practical, but the staff had not reviewed the venting details. Region IV should close the unresolved item in the next resident integrated inspection report.

Members of the public were not in attendance. A list of meeting attendees is enclosed. A copy of the licensees slides presented at the meeting has been placed in the NRC Agencywide Documents Access and Management System Accession Number ML061290460.

Please direct any inquiries to me at 301-415-3764, or bjb@nrc.gov.

/RA/

Brian Benney, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-298

Enclosure:

List of Attendees cc w/encl: See next page

May 12, 2006 LICENSEE: Nebraska Public Power District (NPPD)

FACILITY: Cooper Nuclear Station (CNS)

SUBJECT:

SUMMARY

OF MAY 5, 2006, MEETING WITH NPPD ON CNS TORNADO CONCERNS (TAC NO. MC8236)

On May 5, 2006, a Category 1 public meeting was held between the U.S. Nuclear Regulatory Commission (NRC) and representatives of NPPD at the NRC Headquarters, One White Flint North, 11555 Rockville Pike, Rockville, Maryland. The purpose of the meeting was to discuss concerns related to the design of components and systems inside the diesel generator (DG) building and their ability to withstand tornado pressurization loads. The concerns were identified and documented as an unresolved item in a Safety System Design and Performance Capability inspection conducted in May 2005. The licensee presented its venting analysis of the DG building and discussed its calculations that demonstrated the structural adequacy of the heating, ventilation, and air conditioning ducting during depressurization and repressurization phases of the tornado event.

The NRC staff determined that there was not an immediate safety concern for components inside the DG building at CNS. However, the NRC staff still intends to look at this on a generic basis. The NRC staff felt that the alternate calculation performed was reasonable and practical, but the staff had not reviewed the venting details. Region IV should close the unresolved item in the next resident integrated inspection report.

Members of the public were not in attendance. A list of meeting attendees is enclosed. A copy of the licensees slides presented at the meeting has been placed in the NRC Agencywide Documents Access and Management System Accession Number ML061290460.

Please direct any inquiries to me at 301-415-3764, or bjb@nrc.gov.

/RA/

Brian Benney, Project Manager Plant Licensing Branch IV Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-298

Enclosure:

List of Attendees cc w/encl: See next page DISTRIBUTION:

PUBLIC RidsOgcRp JClark, RIV LPLIV Reading RidsRgn4MailCenter SSamaddar, NRR/ADES RidsNrrDorlLpl4 RJasinski, NRR GImbro, NRR/ADES RidsNrrPMBBenney RidsNrrDeEemb MHartzman, NRR/ADES RidsNrrLALFeizollahi HWalker, NRR/ADES SO'Connor, RIV EDO RidsAcrsAcnwMailCenter Package: ML06130077 Meeting Notice: ML061000041 Mtg Summary No: ML061300112 Handout No.: ML061290460 Mtg Reschedule No: ML061080032 Mtg Postponement Reason: ML061080105 OFFICE LPL4/PM LPL4/LA PD4/BC NAME BBenney;mxr4 LFeizollahi DTerao DATE 5/11/06 5/11/06 5/12/06 OFFICIAL RECORD COPY

Cooper Nuclear Station Tornado Concerns May 5, 2006 Attendees NAME ORGANIZATION G. Kline NPPD J. Lechner NPPD A. Mitchell NPPD T. Stevens NPPD J. Roberts NPPD R. Yantz NPPD D. Terao NRC B. Benney NRC J. Clark NRC S. Samaddar NRC M. Hartzman NRC K. Manoly NRC H. Walker NRC G. Imbro NRC A. Marion NEI J. McCan Entergy NEI - Nuclear Energy Institute NPPD - Nebraska Public Power District NRC - Nuclear Regulatory Commission Enclosure

Cooper Nuclear Station cc:

Mr. William J. Fehrman Mr. H. Floyd Gilzow President and Chief Executive Officer Deputy Director for Policy Nebraska Public Power District Missouri Department of Natural Resources 1414 15th Street P. O. Box 176 Columbus, NE 68601 Jefferson City, MO 65102-0176 Mr. Gene Mace Senior Resident Inspector Nuclear Asset Manager U.S. Nuclear Regulatory Commission Nebraska Public Power District P. O. Box 218 P.O. Box 98 Brownville, NE 68321 Brownville, NE 68321 Regional Administrator, Region IV Mr. John C. McClure U.S. Nuclear Regulatory Commission Vice President and General Counsel 611 Ryan Plaza Drive, Suite 400 Nebraska Public Power District Arlington, TX 76011 P. O. Box 499 Columbus, NE 68602-0499 Director, Missouri State Emergency Management Agency Mr. Paul V. Fleming P. O. Box 116 Licensing Manager Jefferson City, MO 65102-0116 Nebraska Public Power District P.O. Box 98 Chief, Radiation and Asbestos Brownville, NE 68321 Control Section Kansas Department of Health Mr. Michael J. Linder, Director and Environment Nebraska Department of Environmental Bureau of Air and Radiation Quality 1000 SW Jackson P. O. Box 98922 Suite 310 Lincoln, NE 68509-8922 Topeka, KS 66612-1366 Chairman Mr. Daniel K. McGhee Nemaha County Board of Commissioners Bureau of Radiological Health Nemaha County Courthouse Iowa Department of Public Health 1824 N Street Lucas State Office Building, 5th Floor Auburn, NE 68305 321 East 12th Street Des Moines, IA 50319 Ms. Julia Schmitt, Manager Radiation Control Program Mr. Keith G. Henke, Planner Nebraska Health & Human Services R & L Division of Community and Public Health Public Health Assurance Office of Emergency Coordination 301 Centennial Mall, South 930 Wildwood P.O. Box 570 P.O. Box 95007 Jefferson City, MO 65102 Lincoln, NE 68509-5007

Cooper Nuclear Station Jerry C. Roberts, 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 Mr. Randall K. Edington Vice President-Nuclear and CNO Nebraska Public Power District P. O. Box 98 Brownville, NE 68321