Document: NUREG-0800
Document ID: 3c44b75b-63b3-4eaf-b176-9745ea640408
Document Type: srp
Title: - Response of Soil and Rock to Dynamic Loading.  In meeting the requirements of
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1230/ML12302A004.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.4.7
CFR Part: 
CFR Title: 

Content:
10 CFR Parts 50 and 100, descriptions of the response of soil and rock to dynamic loading are acceptable if: A. An investigation has been conducted and discussed to determine the effects of prior earthquakes on the soils and rocks at the site. Evidence of liquefaction and sand cone formation should be included. B. Field seismic surveys (surface refraction and reflection and in-hole and cross-hole seismic explorations) have been accomplished and the data presented and interpreted to develop bounding P and S wave velocity profiles. C. Dynamic tests have been performed in the laboratory on undisturbed samples of the foundation soil and rock sufficient to develop strain-dependent modulus-reduction and hysterietic damping properties of the soils and the results included. If generic soil degradation properties are used in the related preliminary analyses (e.g., site seismic response and soil structure interaction 2.5.4-13 Draft Revision 5 – August 2013 analyses), then reconciliation of the generic properties and laboratory testing results should be performed. The section should be cross-referenced with Subsection 2.5.2.5. The soil-structure interaction analysis (SSI) should be described in Sections 3.7.1 and 3.7.2 and cross-referenced to this subsection. Response of soil and rock to dynamic loading and soil-structure interaction is evaluated by a detailed study of the results of the investigations and analyses performed. Specifically, the effects of past earthquakes on site soils or rocks (a requirement in SRP Section 2.5.2) are determined. The data from core borings, from geophysical investigations, and from dynamic laboratory tests such as sonic and resonant column, torsional shear and cyclic triaxial tests on undisturbed samples are evaluated. The object of the staff review is to ascertain that reasonably conservative dynamic soil and rock characteristic, together with their potential variability, are developed to support plant design and associated analyses and that