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:
progress and final conclusions have often not been made. Because of this, the question and answer exchange may not be complete at the Q-2 stage. Most of the open items of Section 2.5 remaining at the time that the safety 47 evaluation report (SER) input is required are in the geotechnical engineering area because actual site conditions may not be fully revealed until excavations are opened and construction has begun. Thus, a site visit, in addition to that noted in Section 2.5.1, "Basic Geologic and Seismic Information," is necessary during the post-CP period to examine the foundation materials 48 exposed in excavations during construction. Information and final designs, including confirming tests and revised analyses, are to be submitted in the FSARwhen all pertinent geotechnical engineering information is available.49 Generally, the staff is guided by the criteria in References 1 through 11 and the Standard Format (Ref. 12) by Regulatory Guide 1.70 in reviewing Section 2.5.4. 50 Following is a brief description of the review procedures conducted by the staff in evaluating the geotechnical engineering aspects of nuclear power plant sites. Subsection 2.5.4.1. Geologic features are evaluated by conducting an independent literature search and comparing these results with the information included in the applicant's SAR. References used in reviewing this subsection include published or unpublished reports, maps, geophysical data, construction records, etc., by the USGS, other Federal agencies, State agencies, and private companies (such as oil corporations and architect engineering firms). In conjunction with the literature search, the staff and its advisors review the geological investigations conducted by the applicant. Using the references listed at the end of this section and other sources, the following questions are considered in detail: 1. Are the exploratory techniques used by the site investigator representative of the present state-of-the-art? Do the samples