ML061300112

05/05/2006-Cooper Nuclear Station, Meeting Summary of NPPD Meeting Tornado Concerns

ML061300112
Person / Time
Site:	Cooper
Issue date:	05/12/2006
From:	Benney B J Plant Licensing Branch III-2
To:
Benney B J, NRR/DLPM, 415-3764
Shared Package
ML06120077	List: ML061300112
References
TAC MC8236
Download: ML061300112 (5)

Text

May 12, 2006LICENSEE:Nebraska Public Power District (NPPD)FACILITY:Cooper Nuclear Station (CNS)

SUMMARY

OF MAY 5, 2006, MEETING WITH NPPD ON CNS TORNADOCONCERNS (TAC NO. MC8236) On May 5, 2006, a Category 1 public meeting was held between the U.S. Nuclear RegulatoryCommission (NRC) and representatives of NPPD at the NRC Headquarters, One White FlintNorth, 11555 Rockville Pike, Rockville, Maryland. The purpose of the meeting was to discussconcerns related to the design of components and systems inside the diesel generator (DG)building and their ability to withstand tornado pressurization loads. The concerns wereidentified 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 ofthe DG building and discussed its calculations that demonstrated the structural adequacy of theheating, 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 componentsinside the DG building at CNS. However, the NRC staff still intends to look at this on a genericbasis. 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 itemin the next resident integrated inspection report.Members of the public were not in attendance. A list of meeting attendees is enclosed. A copyof the licensee's slides presented at the meeting has been placed in the NRC AgencywideDocuments 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 RegulationDocket No. 50-298

Enclosure:

List of Attendees cc w/encl: See next page May 12, 2006LICENSEE:Nebraska Public Power District (NPPD)FACILITY:Cooper Nuclear Station (CNS)

SUMMARY

OF MAY 5, 2006, MEETING WITH NPPD ON CNS TORNADOCONCERNS (TAC NO. MC8236) On May 5, 2006, a Category 1 public meeting was held between the U.S. Nuclear RegulatoryCommission (NRC) and representatives of NPPD at the NRC Headquarters, One White FlintNorth, 11555 Rockville Pike, Rockville, Maryland. The purpose of the meeting was to discussconcerns related to the design of components and systems inside the diesel generator (DG)building and their ability to withstand tornado pressurization loads. The concerns wereidentified 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 ofthe DG building and discussed its calculations that demonstrated the structural adequacy of theheating, 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 componentsinside the DG building at CNS. However, the NRC staff still intends to look at this on a genericbasis. 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 itemin the next resident integrated inspection report.Members of the public were not in attendance. A list of meeting attendees is enclosed. A copyof the licensee's slides presented at the meeting has been placed in the NRC AgencywideDocuments 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 RegulationDocket No. 50-298

Enclosure:

List of Attendees cc w/encl: See next pageDISTRIBUTION:PUBLICRidsOgcRpJClark, RIV LPLIV ReadingRidsRgn4MailCenterSSamaddar, NRR/ADESRidsNrrDorlLpl4RJasinski, NRRGImbro, NRR/ADES RidsNrrPMBBenneyRidsNrrDeEembMHartzman, NRR/ADESRidsNrrLALFeizollahiHWalker, NRR/ADESSO'Connor, RIV EDORidsAcrsAcnwMailCenterPackage: ML06130077Meeting Notice: ML061000041Mtg Summary No: ML061300112Handout No.: ML061290460Mtg Reschedule No: ML061080032Mtg Postponement Reason: ML061080105OFFICELPL4/PMLPL4/LAPD4/BCNAMEBBenney;mxr4LFeizollahiDTerao DATE5/11/065/11/065/12/06OFFICIAL RECORD COPY Cooper Nuclear StationTornado ConcernsMay 5, 2006 AttendeesNAMEORGANIZATIONG. KlineNPPDJ. LechnerNPPD A. MitchellNPPD T. StevensNPPD J. RobertsNPPD R. YantzNPPD D. TeraoNRC B. BenneyNRC J. ClarkNRC S. SamaddarNRC M. HartzmanNRC K. ManolyNRC H. WalkerNRC G. ImbroNRC A. MarionNEI J. McCanEntergyNEI- Nuclear Energy InstituteNPPD- Nebraska Public Power District NRC- Nuclear Regulatory CommissionEnclosure Cooper Nuclear Station cc:Mr. William J. Fehrman President and Chief Executive Officer Nebraska Public Power District

1414 15 th StreetColumbus, NE 68601Mr. Gene MaceNuclear Asset Manager Nebraska Public Power District

P.O. Box 98 Brownville, NE 68321Mr. John C. McClureVice President and General Counsel Nebraska Public Power District

P. O. Box 499 Columbus, NE 68602-0499Mr. Paul V. FlemingLicensing Manager Nebraska Public Power District

P.O. Box 98 Brownville, NE 68321Mr. Michael J. Linder, Director Nebraska Department of Environmental Quality P. O. Box 98922 Lincoln, NE 68509-8922Chairman Nemaha County Board of Commissioners Nemaha County Courthouse 1824 N Street Auburn, NE 68305Ms. 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 68509-5007Mr. H. Floyd GilzowDeputy Director for Policy Missouri Department of Natural Resources

P. O. Box 176 Jefferson City, MO 65102-0176Senior Resident Inspector U.S. Nuclear Regulatory Commission P. O. Box 218 Brownville, NE 68321Regional Administrator, Region IVU.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011Director, Missouri State Emergency Management Agency

P. O. Box 116 Jefferson City, MO 65102-0116Chief, Radiation and Asbestos Control Section Kansas Department of Health and Environment Bureau of Air and Radiation 1000 SW JacksonSuite 310 Topeka, KS 66612-1366Mr. Daniel K. McGheeBureau of Radiological Health Iowa Department of Public Health Lucas State Office Building, 5th Floor 321 East 12th Street Des Moines, IA 50319Mr. Keith G. Henke, PlannerDivision of Community and Public Health Office of Emergency Coordination 930 Wildwood P.O. Box 570 Jefferson City, MO 65102 Cooper Nuclear Station Jerry C. Roberts, Director of Nuclear Safety Assurance Nebraska Public Power District

P.O. Box 98 Brownville, NE 68321Mr. John F. McCann, DirectorLicensing, Entergy Nuclear Northeast Entergy Nuclear Operations, Inc.

440 Hamilton Avenue White Plains, NY 10601-1813Mr. Randall K. EdingtonVice President-Nuclear and CNO Nebraska Public Power District

P. O. Box 98 Brownville, NE 68321