Document: NRC Regulatory Guide
Document ID: cfc61809-5745-460f-8a26-13c168659924
Document Type: regulatory_guide
Title: Identification and Characterization of Seismic Sources and Determination of Safe Shutdown Earthquake Ground Motion
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML0037/ML003740084.pdf
Revision Date: 2023-06
Chapter: 
Section ID: RG-1.165
CFR Part: 
CFR Title: 

Content:
t are characterized as Seismic Category I. In addition to geo logical, geophysical, and seismological investigations, detailed geotechnical engineering investigations as de scribed in Regulatory Guide 1.132 (Ref. D.3) should be conducted at the site. The investigations needed to assess the Suitabil ity of the site with respect to effects of potential ground motions and surface deformation should in clude determination of (1) the lithologic, stratigraph ic, geomorphic, hydrologic, geotechnical, and struc tural geologic characteristics of the site and the area surrounding the site, including its seismicity and geological history, (2) geological evidence of fault offset or other distortion such as folding at or near ground surface within the site area (8 km radius), and (3) whether or not any faults or other tectonic struc tures, any part of which are within a radius of 8 km (5 mi) from the site, are capable tectonic sources. This information will be used to evaluate tectonic struc tures underlying the site area, whether buried or ex pressed at the surface, with regard to their potential for generating earthquakes and for causing surface deformation at or near the site. This partof the evalua tion should also consider the possible effects caused by human activities such as withdrawal of fluid from or addition of fluid to the subsurface, extraction of minerals, or the loading effects of dams and reser voirs. D.1.2 Reconnaissance Investigations, Literature Review, and Other Sources of Preliminary Information Regional literature and reconnaissance-level in vestigations can be planned based on reviews of avail able documents and the results of previous investiga tions. Possible sources of information may include universities, consulting firms, and government agen cies. A detailed list of possible sources of information is given in Regulatory Guide 1.132 (Ref. D.3). D.2.3 Detailed Site Vicinity and Site Area Investigations The following methods are suggested but they are