Document: NUREG-0800
Document ID: 844a0919-d819-4f6b-afc7-8791d8536178
Document Type: srp
Title: BASIC GEOLOGIC AND SEISMIC INFORMATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070730464.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.1
CFR Part: 
CFR Title: 

Content:
essively greater detail closer to the site, within each of four areas defined by circles drawn around the site using radii of 320 km (200 mi), 40 km (25 mi), 8 km (5 mi), and 1 km (0.6 mi). These four circumscribed areas correspond, respectively, to site region, site vicinity, site area, and site location. The geologic, seismic, geophysical, and geotechnical information provided by an applicant in the Safety Analysis Report (SAR) to support the license application addresses the following three specific topics necessary for review of regional geology (SAR Section 2.5.1.1) and site geology (SAR Section 2.5.1.2): tectonic and seismic information, non-tectonic deformation information, and conditions caused by human activities. As part of the process for reviewing regional and site geology, the reviewer assesses information provided on regional and site-specific physiography, geomorphology, stratigraphy, lithology, structural geology, seismology, paleoseismology, and geologic and tectonic history with an emphasis on the Quaternary Period. The Quaternary is defined as the geologic period running from 1.8 million years ago (mya) to the present (Reference 5). 1. Tectonic and Seismic Information The reviewer assesses information related to lithologic, stratigraphic, and structural geologic characteristics of the site and the region around the site, including geologic and tectonic history; tectonic deformation features underlying the site and region, particularly features of Quaternary age, including faulting and fault recurrence rates; and seismicity and vibratory ground motions, including earthquake recurrence rates, correlation of seismic events with tectonic structures, and characterization of seismic sources. Seismicity and vibratory ground motions are primary review responsibilities addressed in SRP Section 2.5.2. Close coordination between geologists, geophysicists, seismologists, and geotechnical specialists is essential for a thorough review. The reviewer confirms