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:
effects of soil-structure interaction are appropriately included in the evaluation. In addition, the use of these criteria allow the SSI analysis to calculate the floor response spectra for use in qualification of equipment. Meeting these requirements provides assurance that appropriate methods will be used to determine the structural response of systems, under the SSE and OBE (if applicable), which will ensure that they will remain functional within applicable acceptance limits. III. REVIEW PROCEDURES The reviewer will select material from the procedures described below, as may be appropriate for a particular case. These review procedures are based on the identified SRP acceptance criteria. For deviations from these acceptance criteria, the staff should review the applicant's evaluation of how the proposed alternatives provide an acceptable method of complying with the relevant NRC requirements identified in Subsection II. 1. Seismic Analysis Methods. For all Category I SSCs, the applicable methods of seismic analysis (response spectra, time history, equivalent static load) are reviewed to confirm 3.7.2-20 Revision 3 - March 2007 that the techniques employed are in accordance with the acceptance criteria as given in subsection II.1 of this SRP section. If empirical methods or tests are used in lieu of analysis for any Category I structure, these are evaluated to determine whether or not the assumptions are conservative, and whether the test procedure adequately models the seismic response. 2. Natural Frequencies and Response Loads. The summary of natural frequencies and response loads is reviewed for compliance with the acceptance criteria in subsection II.2 of this SRP section. 3. Procedures Used for Analytical Modeling. The procedures used for modeling of seismic 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