Document: NUREG-0800
Document ID: 900b3bbd-8b71-4ab8-aa2d-c7c0789a551a
Document Type: srp
Title: 3.05
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070640306.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.50
CFR Part: 
CFR Title: 

Content:
4 18.52 15.59 67.28 24.88 10.71 11.65 19.57 7.78 1.55 1.97 5 16.67 8.64 41.92 18.48 6.97 6.46 10.80 4.21 0.76 1.24 6 14.31 5.82 25.16 12.13 4.12 3.65 6.51 2.49 0.42 0.68 7 10.70 3.97 17.94 6.96 2.29 1.90 4.38 1.55 0.25 0.36 8 8.64 2.94 11.85 4.77 1.35 1.05 2.73 1.01 0.15 0.20 9 5.80 2.09 7.86 3.23 0.84 0.61 1.85 0.74 0.09 0.12 10 4.34 1.46 5.21 2.41 0.50 0.41 1.24 0.53 0.06 0.08 15 0.85 0.16 1.20 0.42 0.08 0.07 0.32 0.11 0.01 0.01 20 0.23 0.04 0.42 0.12 0.03 0.02 0.12 0.03 0.01 25 0.01 0.05 WUS Soil Sites Magnitude 5 - 6 Magnitude 6 - 7 Magnitude 7+ 3.7.1-27 Revision 3 - March 2007 As an example, the target PSD for a Western US rock site, Magnitude 6 - 7, 10 to 50 km, is extracted from Table 3 and shown in Figure 1. The PSD for the time history developed to match the design spectrum shall exceed 80% of this target for frequencies between 0.3 Hz and 25 Hz. Figure 1 REFERENCES 1. NUREG/CR-6728, “Technical Basis for Revision of Regulatory Guidance on Design Ground Motions: Hazard- and Risk-consistent Ground Motion Spectra Guidelines.” 2. NUREG/CR-5347,"Recommendations for Resolution of Public Comments on USI A-40, Seismic Design Criteria," June 1989. 3. NUREG/CR-3509, "Power Spectral Density Functions Compatible with NRC Regulatory Guide 1.60 Response Spectra," June 1988. 3.7.1-28 Revision 3 - March 2007 APPENDIX C TO SRP SECTION 3.7.1 SCALE FACTORS FOR RESPONSE SPECTRA DAMPING RATIOS RELATIVE TO THE 5% DAMPED RESPONSE SPECTRA The purpose of this appendix is to present the ratios of response spectra at a given damping value to the 5% damped response spectrum. A number of previous recommendations have been made over the years but these have generally been limited by the restricted data set of recordings used to develop the recommendations. This study performed the evaluation using all the records currently available in the data set presented with NUREG/CR-6728. These are three component data sets (two horizontal and one vertical) of both empirical (recorded) and