Document: NUREG-0800
Document ID: 500d6b1d-6d0c-45db-abba-a953c0faa92a
Document Type: srp
Title: STABILITY OF SUBSURFACE MATERIALS AND FOUNDATIONS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1006/ML100610449.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.4
CFR Part: 
CFR Title: 

Content:
ubsidence, uplift or collapse, deformation, alternation, solution cavities or structural weakness, unrelieved stresses in bedrock, or rocks or soils that might be unstable because of their physical or chemical properties been identified and adequately evaluated? 2. 2.5.4.2 - Properties of Subsurface Materials. In meeting the requirements of 10 CFR Parts 50 and 100, the description of properties of underlying materials is considered acceptable if state-of-the-art methods are used to determine the static and dynamic engineering properties of all foundation soils and rocks in the site area. These methods are described, for example, in geotechnical journals published by the American Society of Civil Engineers (Refs. 14, 22, and 23), applicable standards published by the American Society for Testing and Materials (Ref. 15), publications of the Institution of Civil Engineers (Ref. 15), and various research reports prepared by universities (Ref. 17). The properties of foundation material must be supported by field (Refs. 19 and 20) and laboratory (Ref. 21) test records. 2.5.4-7 Revision 4 - May 2010 Normally, a complete field investigation and sampling program must be performed to define the occurrence and properties of underlying materials at a given site (Ref. 18). Summary tables must be provided which catalog the important test results; test results should be plotted when appropriate. Also, a detailed discussion of laboratory sample preparation must be given when applicable. For critical laboratory tests, full details must be given, e.g., how saturation of the sample was determined and maintained during testing, transported and how the pore pressures were monitored during the experiment. The applicant should provide a detailed and quantitative discussion of the criteria used to determine that the samples were properly taken, and tested in sufficient number to define all the critical soil parameters for the site, together with their potential variability. For sites that