Document: NUREG-0800
Document ID: 45f5ae97-c10e-4f7c-8a03-7290d3d86c23
Document Type: srp
Title: ensure that the effects of the three components of earthquake motion and the
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070640311.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.2
CFR Part: 
CFR Title: 

Content:
systems are reviewed to determine whether the three-dimensional characteristics of structures are properly modeled in accordance with the acceptance criteria of subsection II.3 of this SRP section and whether all significant degrees of freedom have been incorporated in the models. The criteria for decoupling of a structure, equipment, or component and analyzing it separately as a subsystem are reviewed for conformance with the acceptance criteria given in subsection II.3 of this SRP section. 4. Soil-Structure Interaction. The methods of SSI analysis used are examined to determine that the techniques employed are in accordance with the acceptance criteria as given in subsection II.4 of this SRP section. Typical mathematical models for SSI analysis are reviewed to ensure the adequacy of the representation in accordance with subsection II.4 of this SRP section. In addition, the methods used to assess the effects of adjacent structures on structural response in SSI analysis are reviewed to establish their acceptability. 5. Development of In-Structure Response Spectra. Procedures for developing the in- structure response spectra are reviewed to verify that they are in accordance with the acceptance criteria specified in subsection II.5 of this SRP section. If a direct generation method of analysis is used to develop the in-structure response spectra, its conservatism compared to that of a time history approach is reviewed. 6. Three Components of Earthquake Motion. The procedures by which the three components of earthquake motion are considered in determining the seismic response of SSCs are reviewed to determine compliance with the acceptance criteria of subsection II.6 of this SRP section. 7. Combination of Modal Responses. The procedures for combining modal responses are reviewed to determine compliance with the acceptance criteria of subsection II.7 of this SRP section. 8. Interaction of Non-Category I Structures with Category I SSCs. The design and analysis criteria