Document: NUREG-0800
Document ID: 8160c1fd-7cef-4c93-8e12-456019f2cfd2
Document Type: srp
Title: FOUNDATIONS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1319/ML13198A267.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.8.5
CFR Part: 
CFR Title: 

Content:
ollows. Seismic Category I structures (foundations and superstructures) should be designed to take into account the additional member forces and moments that are induced by the combined effects of the construction sequence and the short term differential settlement of the soil under the foundation, as well as the long-term settlement expected to occur during the life of the structure. Past experience and current industry codes and standards indicate that these are important design considerations. SRP Sections 3.8.1, 3.8.3, 3.8.4, and 3.8.5 were enhanced to provide additional guidance regarding: (1) how to consider the effects of the construction sequence and the differential settlements (including the long-term settlements expected to occur during the life of the structure) in the standard design process which postulates the geotechnical parameters that are generic (i.e., not the result of a site-specific geotechnical investigation), and does not fully specify the construction sequence; (2) the need to establish a clear interface between DC and COL applications that permits verification of the foundation design by the COL applicant, including implementation of a settlement monitoring program; and (3) specific identification of the loads due to differential settlements and construction sequence as an area of staff review under the “loads and load combinations” section. 3. Enhanced SRP Section 3.8.5 II.7 “Testing and Inservice Surveillance Requirements” to include a settlement monitoring program. The technical rationale for this change is as follows. SRP Section 3.8.5 II.7 was enhanced to specifically describe the implementation of a settlement monitoring program as part of the testing and in-service surveillance provisions for seismic Category I foundations.