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:
Manual” (Ref. 17) gives guidance on identifying and delineating wetlands. Information on applications for Section 404 permits for modifying wetlands can be obtained from District Offices of the Army Corps of Engineers. 2.6 Related Considerations RG 1.208 provides guidance on seismicity and related seismic data and historical records, together with guidance on determination of vibratory ground motion resulting from earthquakes. Many of the investigations listed in RG 1.208 could and should be coordinated with the site investigations described in this guide and conducted at the same time for greater efficiency. Appendix C to RG 1.208 should be used as guidance for investigating tectonic and nontectonic surface deformation. DG-1392, Page 10 3. Evaluation of Previously Published Information, Field Reconnaissance, and Preliminary Assessment of Site Suitability 3.1 General Establishing the geologic characteristics and engineering properties of a site is an iterative process during which successive phases of investigation produce increasingly detailed data. Therefore, it is important to have a proper system for recording the data and gaining a three-dimensional spatial understanding of site conditions. A geographic information system (GIS) database is an efficient way to collect and present spatial data. A well-planned database system for compiling pertinent data is important for data retrieval and analysis and is a part of the quality assurance requirements for a project (see Regulatory Position 7.2). RG 1.208 indicates that geologic, seismic, and geophysical investigations are to be performed to develop an up-to-date, site-specific, geoscience database that supports the site characterization efforts. 3.2 Evaluation of Previously Published Information The first step in the site investigation process is to acquire and evaluate existing data related to geologic characteristics and engineering properties of the site. Information about regional geology should be considered