Document: NUREG-0800
Document ID: 37cffa0d-e657-4938-b590-ae79bce52420
Document Type: srp
Title: - Techniques to Improve Subsurface Conditions.  In meeting the requirements
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1230/ML12302A004.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.5.4.12
CFR Part: 
CFR Title: 

Content:
of 10 CFR Part 50, the discussion of techniques to improve subsurface conditions is acceptable if plans, summaries of specifications, and methods of quality control are described for all techniques to be used to improve foundation conditions (such as grouting, vibroflotation, bridging mats, dental work, rock bolting, or anchors). Planned techniques to improve subsurface conditions are evaluated by reviewing the applicant's specifications and techniques for performance and quality control for such activities as grouting, excavation and backfill, vibroflotation, rock bolting, and anchoring. Technical Rationale The technical rationale for application of these acceptance criteria to the areas of review addressed by this SRP section is discussed in the following paragraphs: Compliance with 10 CFR 50.55a requires that SSCs be designed, fabricated, erected, constructed, tested, and inspected as specified by applicable codes and standards commensurate with the importance of the safety functions to be performed. Standards developed by the American Society for Testing and Materials (ASTM), American Society of Civil Engineers (ASCE) and other reputable organizations and institutions are used to perform soil analyses and tests for determining the static and dynamic properties of the soils and rock that will underlie the plant's SSCs. To satisfy the geotechnical engineering requirements of 10 CFR Part 100, the applicant's technical submittal must contain a description of subsurface soil and rock characteristics for the proposed site, a description of the excavation techniques and design of soil retaining systems, and include static and dynamic analyses of plant foundations. This information will permit the staff to assess the acceptability of the site and to determine the 2.5.4-17 Draft Revision 5 – August 2013 potential influence of these characteristics on the design of SSCs designated as important to safety. Meeting these requirements provides assurance that plant SSCs