Document: NRC Regulatory Guide
Document ID: a094549d-8685-4dad-b90f-c28c7d279a53
Document Type: regulatory_guide
Title: Geologic and Geotechnical Site Characterization Investigations for Nuclear Power Plants + HISTORY – HISTORY 08/2021 – DG-1392 , Proposed Revision 3 07/2014 – Periodic Review of Revision 2 – Reviewed with no issues identified 02/2001 – DG-1101 , Proposed Revision 2 (Rev. 3)
Source: NRC Regulatory Guide Division 1
Source URL: https://www.nrc.gov/docs/ML2119/ML21194A176.pdf
Revision Date: 2023-05
Chapter: 
Section ID: RG-1.132
CFR Part: 
CFR Title: 

Content:
esented and linked directly to the information that provides the bases for the conclusions. Site-specific information to be developed and analyzed should include, but not be limited to, the following: DG-1392, Page 12 (1) Topographic and geologic maps. The geologic maps should show rock types and locations of tectonic and nontectonic geologic features, as well as points where field samples were collected for laboratory analysis (e.g., for radiometric age dating and determination of material properties). (2) Plot plans showing the locations of major anticipated engineered structures and points at which site investigation tests were conducted and data or measurements were collected. (3) Boring logs and geologic logs of exploratory trenches and excavations. (4) Geologic profiles illustrating subsurface geology and excavation limits for engineered structures. (5) Geophysical information such as survey lines, seismic survey time-distance plots, resistivity curves, seismic reflection and refraction plots, seismic wave velocity profiles, surface wave dispersion plots, and borehole loggings. Locations of all boreholes, ground water observation wells and piezometers, in situ tests, trenches, exploration pits, and geophysical measurements should be surveyed in both plan and elevation. This three-dimensional information should be entered into a GIS database. Suitable cross sections, maps, and plans should be prepared to facilitate visualization of the geologic information. Regulatory Position 7.1 gives further details. Detailed site investigations should use applicable industrial standards for specific techniques, methods, and procedures. Regulatory Position 7.2 provides quality assurance requirements. Use of investigative and sampling techniques other than those discussed in this guide is acceptable when it can be shown that the alternative techniques yield satisfactory results. 4.2 Surface Investigations Detailed surface geologic and geotechnical engineering investigations