Document: NUREG-0800
Document ID: 61e05f02-76ce-4353-b1f5-002fe0888f38
Document Type: srp
Title: -2
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1331/ML13316C064.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.3
CFR Part: 
CFR Title: 

Content:
years ago (Ma) and continues to the present. Emphasis is placed on Quaternary-age features because evidence of surface deformation during the last approximately 2.6 million years generally indicates a potential for future surface deformation to occur. The applicant provides geologic, seismic, geophysical, and geotechnical information in Safety Analysis Report (SAR) Section 2.5.3 addressing the following specific topics that are the basis for the assessment of the potential for tectonic and non-tectonic surface deformation at the site: 1. Geologic, Seismic, and Geophysical Investigations. The reviewer assesses information provided by an applicant related to Quaternary tectonics, structural geology, stratigraphy, paleoseismology, geochronological methods used for age dating, and the geologic history of the site vicinity, area, and location. Staff reviews to ensure that the information is complete; acceptably considers other studies carried out in the same areas; and is supported by detailed investigations conducted by the applicant. For coastal and inland sites near large bodies of water, similar detailed investigations are to be conducted by the applicant for onshore and offshore geology and seismology. The applicant shall determine if surface deformation features are located beneath bodies of water and need to be considered in the assessment. 2. Geologic Evidence for Surface Deformation. The reviewer assesses information provided by an applicant for the site vicinity, area, and location to confirm presence or absence of surface tectonic (i.e., faults) and non-tectonic (e.g., growth faults; subsidence and collapse due to dissolution of limestone, salt or gypsum deposits, or salt diapirism) deformation. 3. Timing of Deformation. If deformation features are present in the site vicinity, area, or location, the reviewer evaluates the information used to constrain the age of the most recent deformation event, and, if applicable, the ages of preceding events. The reviewer