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:
ll three-dimensional information should be entered into a GIS database because data of various types, in the form of tables, can be associated with a coordinate system and recalled to form the desired graphical output. Choice of a specific system is up to the applicant, but the data should be in a format that is readily readable. It is necessary to have personnel with experience in surveying and storing and displaying data in a GIS database throughout all phases of site investigation and construction in order to (1) accurately record information obtained, (2) place geologic, geotechnical, sampling, and testing information into a spatial context, and (3) permit visual display of data on maps and cross sections. Development of the GIS database is an essential activity that should be given proper emphasis and support by applicants and licensees. 7.2 Records, Sample Retention, and Quality Assurance All data acquired during site characterization investigations should be organized into logical categories and preserved as a permanent record, at least until the power plant is licensed to operate and all matters relating to the interpretation of subsurface conditions at the site have been resolved. Much of the data will already be part of the GIS database, but other data and records, such as logs of operations, photographs, test results, and engineering evaluations and calculations, should also be preserved for further reference. Samples and rock cores from principal borings should also be retained. Regulatory Position 4.3.3 and Chapter 7 of NUREG/CR-5738 describe procedures for handling and storing samples. The need to retain samples and cores beyond the recommended time is a matter of judgment and should be evaluated on a case-by-case basis. For example, soil samples in tubes will deteriorate with time and will not be suitable for undisturbed testing. However, they may be used as a visual record of the foundation material. Similarly, rock cores subject to slaking and rapid