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:
ity, * Relationship of the potential seismic source to other potential seismic sources in the region, "* Seismic potential of the seismic source, based on the source's known characteristics, including seismicity, "* Recurrence model (frequency of earthquake oc currence versus magnitude), "* Other factors that will be evaluated, depending on the geologic setting of a site, such as: * Quaternary (last 2 million years) displace ments (sense of slip on faults, fault length and width, area of the fault plane, age of displace ments, estimated displacement per event, es timated magnitude per offset, segmentation, orientations of regional tectonic stresses with 1.165-30 1% respect to faults, and displacement history or uplift rates of seismogenic folds), * The late Quaternary interaction between faults that compose a fault system and the -' interaction between fault systems. * Effects of human activities such as withdraw al of fluid from or addition of fluid to the subsurface, extraction of minerals, or the construction of dams and reservoirs, * Volcanism. Volcanic hazard is not addressed in this regulatory guide. It will be considered on a case-by-case basis in regions where a potential for this hazard exists. D.2. INVESTIGATIONS TO EVALUATE SEISMIC SOURCES D.2.1 General Investigations of the site and region around the site are necessary to identify both seismogenic sources and capable tectonic sources and to determine their poten tial for generating earthquakes and causing surface de formation. If it is determined that surface deformation need not be taken into account at the site, sufficient data to clearly justify the determination should be presented in the application for an early site permit, construction permit, operating license, or combined license. Gener ally, any tectonic deformation at the earth's surface within 40 km (25 miles) of the site will require detailed examination to determine its significance. Potentially active tectonic deformation within the