Document: NUREG-0800
Document ID: 29f5ac9f-4962-4021-913a-6375076e03fd
Document Type: srp
Title: SEISMIC SYSTEM ANALYSIS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340566.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.2
CFR Part: 
CFR Title: 

Content:
roach 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 structures, systems, and components 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 (shears, moments, stresses, deflections, and accelerations) are reviewed to determine compliance with 3.7.2-18 Rev. 2- August 1989 the acceptance criteria of subsection II.7 of this SRP section when a response spectrum modal analysis method is used. 8. Interaction of Non-Category I Structures with Category I Structures The design and analysis criteria for interaction of non-Category I struc- tures with Category I structures 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, dampings, soil properties, and soil-structure interactions on floor response spectra (e.g., peak width and period coordinates) and to determine compli- ance with the acceptance criteria of subsection II.9 of this SRP section. 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 structure, system, or component in lieu of a detailed dynamic method is reviewed to determine that constant vertical static factors are used only if the structure is rigid in the vertical direction. 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 by including the torsional degrees of freedom in the dynamic model. Justification provided by the applicant