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          NRC Library  Document Collections  NUREG-Series Publications  Publications Prepared by NRC ContractorsRecommendations for Revision of Seismic Damping Values in Regulatory Guide 1.61 (NUREG/CR-6919)

On this page: Publication Information AbstractDownload complete document NUREG/CR-6919 (PDF - 1.67 MB)Publication Information **Manuscript Completed:**September 2006**Date Published:**November 2006 **Prepared by:** R.J. Morante Brookhaven National Laboratory Upton, NY 11973-5000 H.L. Graves, NRC Program Manager **Prepared for:** Division of Fuel, Engineering and Radiological Research Office of Nuclear Regulatory Research U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 NRC Job Code N6185 Availability Notice Abstract This report provides recommendations developed by Brookhaven National Laboratory (BNL) for revision of the damping values in U.S. Nuclear Regulatory Commission (NRC) Regulatory Guide 1.61, "Damping Values for the Seismic Design of Nuclear Power Plants," Rev. 0, issued October 1973. The recommendations included herein are based on the results of various damping studies, as well as NRC licensing actions related to the resolution of damping issues. Recommendations of the NRC Damping Task Force, and additional work performed by BNL to address staff questions have been incorporated into the final recommendations. The recommendations in this document considered recently published guidance on damping for seismic analysis included in ASCE Standard 43-05, "Seismic Design Criteria For Structures, Systems, and Components in Nuclear Facilities" and ASME Boiler and Pressure Vessel Code, Section III, Division 1, Non-Mandatory Appendix N, "Dynamic Analysis Methods", 2004 Edition. 
      
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