Document: NUREG-0800
Document ID: 80e66b61-f0ed-49db-ba0b-ba2b7a7a0d52
Document Type: srp
Title: BASIC GEOLOGIC AND SEISMIC INFORMATION
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0423/ML042390206.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.1
CFR Part: 
CFR Title: 

Content:
hy, and geologic history within a distance of 320 km (200 mi) from the site (site region), to provide a framework within which the safety significance can be evaluated for the geology, seismology, and conditions brought about by human activities. Subsection 2.5.1.2. "Site Geologv." In meeting the requirements of References 1 and 2, and the regulatory positions of References 4 and 5 and certain recommendations of Reference 7, the subsection will be judged acceptable if it contains a description and evaluation of site-related geologic features, seismic conditions, and conditions caused by human activities, at appropriate levels of detail within areas approximately defined by radii of 40 km (25 mi), 8 km (5 mi), and 1 km (0.6 mi) around the site. This subsection should contain the following general site information: 1. The structural geology of the site, specifically the identification and characterization of local seismic sources and their relationship to the regional structural geology and seismic sources. 2. The seismicity of the site, including historical and instrumentally recorded earthquakes, and whether there is a relationship to tectonic structure. 3. The geological history, particularly the Quaternary period, of the site and its relationship to the regional history. 2.5.1-5 Rev. 3 - March 1997 4. Evidence of paleoseismicity or lack of it. 5. The site stratigraphy and lithology and their relationship to those of the region. 6. The engineering significance of geological features underlying the site as they relate to: a. Dynamic behavior during prior earthquakes. b. Zones of alteration, irregular weathering, or zones of structural weakness. c. Unrelieved residual stresses in bedrock. d. Materials that could be unstable because of their mineralogy or unstable physical properties. e. Effects of human activities in the area. 7. The site groundwater conditions. III. REVIEW PROCEDURES The staff review is conducted in three phases. The first phase is the acceptance