Document: NUREG-0800
Document ID: 6b491ea9-a58b-4a6b-9697-23d3734295d2
Document Type: srp
Title: Techniques to Improve Subsurface Conditions.  In meeting the requirements
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070730598.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.4.12
CFR Part: 
CFR Title: 

Content:
or the qualification of subsurface materials and earthworks important to safety. Subsection 2.5.4.5 describes guidance acceptable to the staff for providing data on excavation, backfill, and earthwork analyses. Subsection 2.5.4.12 requires that the applicant discuss techniques to improve subsurface conditions and describe the methods of quality control for all techniques to be used toward that end. Meeting the requirements of Appendix B to 10 CFR Part 50 provides assurance (a) that the static and seismic qualification of subsurface materials and earthworks important to safety will be performed in accordance with established criteria and standards; (b) that the resulting designs, tests, and records will comply with established standards; and (c) that subsurface materials and earthworks will perform as required. Compliance with Appendix S to 10 CFR Part 50 requires that nuclear power plant structures, systems, and components important to safety be designed to be able to withstand the effects of natural phenomena, such as earthquakes, without loss of capability to perform their safety functions. SRP Section 2.5.4 describes guidance acceptable to the staff for determining soil and rock engineering properties as well as the dynamic stability, including liquefaction, of the subsurface materials. Meeting the requirements of Appendix S to 10 CFR Part 50 provides assurance that the nuclear power plant will be designed to withstand anticipated seismic phenomena and 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. Compliance with 10 CFR Part 100 requires that the Commission evaluate the suitability of proposed sites for nuclear power and test reactors. Paragraph 100.10(c) requires that physical characteristics (including seismology, meteorology, geology, and hydrology) be taken into account when determining each site's acceptability. To