Document: NUREG-0800
Document ID: 9cdf4eb8-90c4-435e-84a4-d23c09056921
Document Type: srp
Title: STABILITY OF SUBSURFACE MATERIALS AND FOUNDATIONS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070268.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.4
CFR Part: 
CFR Title: 

Content:
ic phenomena and (b) that, during normal operations or seismic events, the plant will pose no undue risk to the public as a result of instability, deformation, or failure of structural foundations and earthworks.42 7. Compliance with Appendix A to 10 CFR Part 100 requires that the geologic and seismic conditions at the proposed site be considered during the siting and design of a nuclear power plant. Appendix A describes the investigations required to the obtain geologic and seismic data necessary to determine site suitability and to provide reasonable assurance that a nuclear power plant can be constructed and operated at a proposed site without undue risk to the health and safety of the public. Providing geologic and seismic siting data outlined in Appendix A responds to requirements specified in GDC 2, which states that nuclear power plant structures, systems, and components important to safety must be designed to withstand the effects of natural phenomena (including seismic events) without losing the capability to perform their intended safety functions. Item IV(4) of Appendix A requires a determination of static and dynamic engineering properties of materials that underlie the site, thereby affecting (a) behavior during earthquakes and (b) transmission of earthquake-induced motions to the foundations of the plant. Guidance on geologic investigations that provide data on subsurface characteristics and materials properties is provided in Regulatory Guide 1.132. Guidance on laboratory testing of soil and rock properties is provided in Regulatory Guide 1.138. Meeting these requirements provides assurance that plant structures, systems, and components will withstand the effects of seismic events, thereby minimizing the probability that a failure would initiate an accident or exacerbate the consequences of an accident.43 III. REVIEW PROCEDURES The review process is conducted in a similar manner and concurrent with that described in SRP Section 2.5.1. The services of