Document: NUREG-0800
Document ID: 74980693-f1d2-4f59-a418-b297e1cc6509
Document Type: srp
Title: SURFACE FAULTING
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070730597.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.3
CFR Part: 
CFR Title: 

Content:
tailed 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 reviewer also assesses results of these detailed investigations. 2. Geologic Evidence, or Absence of Evidence, for Tectonic Surface Deformation (SAR Section 2.5.3.2). The reviewer assesses surface and subsurface information provided by an applicant for the site vicinity, site area, and site location to confirm presence or absence of tectonic surface deformation (i.e., faulting) and, if present, to demonstrate age of most recent fault displacement and chronology of previous displacements. If surface faulting is present, information provided must also include data on fault geometry (i.e., fault orientation, length, and width), amount and sense of displacement, and recurrence rate. Information provided by the applicant should enable the reviewer to determine that undetected fault offsets (e.g., blind faults) or other types of tectonic surface deformation (e.g., folding, uplift, or subsidence which may indicate a blind fault) are not likely to exist. 3. Correlation of Earthquakes with Capable Tectonic Sources (SAR Section 2.5.3.3). The reviewer evaluates information on all historically-reported earthquakes within 40 km (25 mi) of the site (i.e., in the site vicinity) in regard to hypocenter location accuracy and origin of source. To determine the potential for induced surface deformation, the reviewer also assesses information pertaining to capable tectonic sources that could, based on fault geometry (including fault orientation, length, and width), extend into the site area or to the site location. 2.5.3-3 Revision 4 - March 2007 4. Ages of Most Recent Deformations (SAR Section 2.5.3.4). The reviewer determines whether age of most recent fault displacement has been demonstrated, or acceptably estimated, by an applicant for each significant