Document: NUREG-0800
Document ID: 67c6351b-0021-49c4-b8be-3be94298395e
Document Type: srp
Title: Seismic Wave Transmission Characteristics of the Site.  To meet the
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1331/ML13316C066.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.2.5
CFR Part: 
CFR Title: 

Content:
ws. Particular emphasis is placed on how the uncertainties inherent in this process are evaluated. To meet the requirements of 10 CFR 100.23, this subsection is acceptable when adequate information is provided to demonstrate that the site response analysis adequately estimates both the mean and variability of the site response in accordance with Regulatory Position 4 and Appendix E of RG 1.208. To be acceptable, the seismic wave transmission characteristics (amplification or deamplification) of the materials overlying bedrock at the site are described as a function of the significant frequencies, as described in EPRI Report TR-102293. The following material properties should be determined for each stratum under the site: thickness, seismic compressional and shear wave velocities, bulk densities, soil index properties and classification, shear modulus and damping variations with strain level, and the water table elevation and its variations, as described in RG 1.138. Site and laboratory investigations and testing are performed to obtain data defining the static and dynamic engineering properties of soil and rock materials, and their spatial distribution. The procedures identified in RG 1.132, RG 1.138, and Subsection C.2.2.2 of Appendix C of RG 1.208 are used to identify the soil and rock engineering properties. Additional guidance for determining the static and dynamic properties of soil and rock strata, including soil dynamic tests, is described in SRP Section 2.5.4. In each case, methods used to determine the properties should be described in Subsection 2.5.4 of the applicant’s SAR and cross-referenced in Subsection 2.5.2 of the SAR. Where vertically propagating shear waves might produce the maximum ground motion, a one-dimensional iterative equivalent-linear analysis or nonlinear analysis may be appropriate and is reviewed in conjunction with geotechnical and structural engineering. However, site characteristics (such as a dipping bedrock surface, topographic