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:
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 for interaction of non-Category I structures with Category I SSCs are reviewed to ensure compliance with the acceptance criteria of subsection II.8 of this SRP section. 9. Effects of Parameter Variations on Floor Response Spectra. The seismic system analysis is reviewed to determine whether the analysis considered the effects of expected variations of structural properties, damping values, soil properties, and SSI on floor response spectra (e.g., peak width) and to determine compliance with the acceptance criteria of subsection II.9 of this SRP section. Among the various structural parameters analyzed, the effect of potential concrete cracking on structural stiffness should be addressed. 10. Use of Equivalent Vertical Static Factors. Use of constant static factors as response loads in the vertical direction for the seismic design of any Category I SSC, in lieu of a detailed dynamic method, is reviewed to determine compliance with the acceptance criteria of subsection II.10 of this SRP section. 3.7.2-21 Revision 3 - March 2007 11. Methods Used to Account for Torsional Effects. The methods of seismic analysis are reviewed to determine that the torsional effects of vibration are incorporated, in compliance with the acceptance criteria of subsection II.11 of the SRP section. Justification provided by the applicant for the use of any approximate method to account for torsional effects is reviewed, to ensure that it results in a conservative design. 12. Comparison of Responses. Where applicable, the responses obtained from both time history and response spectrum methods at selected points in major Category I structures are compared to judge the accuracy of the analyses conducted. The applicant should explain any significant discrepancies in the results of the two methods.