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:
t Revision 5 – August 2013 SRP Section 2.5.4 Description of Changes Section 2.5.4 “STABILITY OF SUBSURFACE MATERIALS AND FOUNDATIONS” This SRP section affirms the technical accuracy and adequacy of the guidance previously provided in Revision 3, dated March 2007 of this SRP. See ADAMS Accession No. ML070730598. Changes include considerations in areas related to geotechnical engineering and foundation stability analysis based on lessons learned from past Section 2.5.4 reviews and newer reactor design. The technical changes incorporated in Revision 4, dated May 2013. The title of this section is modified from the earlier Revision 3 as shown above. The following changes were made throughout the sections: 1. Updated text and references to include Regulatory Guide 1.208. 2. Updated text with editorial and clarifying statements. I. AREAS OF REVIEW 1. Updated text to include the evaluation of foundation stability monitoring programs. 2. Updated text to include the review interface between organization responsible for quality assurance and the technical staff. 3. Updated text to include the review interface between SRP Chapter 19 and SRP Section 2.5.4 for seismic risk evaluation. II ACCEPTANCE CRITERIA 1. Updated text to include Regulatory Guide 1.208 as an acceptance criterion. 2. Updated text to provide clarification on number of measurements to determine parameters that represent the field conditions. 3. Updated text to include guidance on deeply embedded foundations and excavation. 4. Updated text to include the specification of an ITAAC when backfill is to be placed under safety related structures. 5. Updated text to include the long- term behavior of the backfill subjected to aggressive groundwater. 6. Updated text to include settlement monitoring program and settlement ITAAC for deep soil sites. 7. Updated text to provide clarification on the site specific GMRS to be used in the potential for liquefaction evaluation. 8. Updated text to provide clarification on