Document: NUREG-0800
Document ID: 352cca3a-8b72-4ad0-be8a-f7d4da401a70
Document Type: srp
Title: GEOLOGIC CHARACTERIZATION INFORMATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1331/ML13316C067.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.1
CFR Part: 
CFR Title: 

Content:
completeness of this information as presented by an applicant are integral parts of the review responsibilities defined in this section. The staff’s review, described in this SRP section, focuses on determining the acceptability of applicant’s characterization of geologic features that might affect site suitability. The review methods and acceptance criteria developed in this SRP section outline an approach to determine if the results of the geologic investigations are acceptable. An applicant may propose other approaches to demonstrate compliance with applicable regulatory requirements and the staff will review those alternatives. The applicant uses this geologic information in its site suitability analyses (FSAR 2.5.2, 2.5.3, 2.5.4 and 2.5.5) and staff reviews those analyses and assessments per SRP 2.5.2, 2.5.3, 2.5.4 and 2.5.5. Because the geologic and tectonic information provided in FSAR Section 2.5.1 directly supports the assessments in FSAR Section 2.5.2 “Vibratory Ground Motion” and Section 2.5.3 “Surface Deformation,” the investigations for Section 2.5.1 generally follow the four areas defined in Regulatory Guide (RG) 1.208, using radii of 320 km (200 mi) for the site region, 40 km (25 mi) for the site vicinity, 8 km (5 mi) for the site area, and 1 km (0.6 mi) for the site location. RG 1.208 indicates the need for increasing levels of detail as the investigations progress closer to the proposed site. In addition, per Title 10 of the Code of Federal Regulations (10 CFR) 100.23 (c), “the size of the region to be investigated and the type of data pertinent to the investigations must be determined based on the nature of the region surrounding the proposed site.” In some locations, for example, the potential for very large earthquakes or for volcanic activity might require investigations to be performed at greater distances from the site than 320 km (200 mi). The geological, geophysical, and geotechnical information provided by an applicant in