Document: NUREG-0800
Document ID: 10bc45c3-8e70-44ed-a57b-2dd08d4ef847
Document Type: srp
Title: SEISMIC SUBSYSTEM ANALYSIS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070640313.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.3
CFR Part: 
CFR Title: 

Content:
REVIEW RESPONSIBILITIES Primary - Organization responsible for reviews of seismic/geotechnical issues Secondary - None I. AREAS OF REVIEW The review scope of this SRP section (seismic subsystems) covers all seismic Category I substructures such as platforms; support frame structures; yard structures; buried piping, tunnels, and conduits; concrete dams; and atmospheric tanks. For distribution systems, including their supports (e.g., cable trays, conduit, HVAC, and piping) and equipment supports, which are reviewed under SRP Sections 3.9.2 and 3.9.3, supplementary seismic analysis criteria are presented in this SRP section. Intervening structural elements between these supports and building structural steel/concrete are also reviewed under this SRP section. The specific areas of review are as follows: 1. Seismic Analysis Methods. The information reviewed is similar to that described in subsection I.1 of Standard Review Plan (SRP) Section 3.7.2 but as applied to seismic Category I subsystems. 2. Determination of Number of Earthquake Cycles. Criteria or procedures used to establish the number of earthquake cycles resulting from the seismic events and the maximum number of cycles for which applicable seismic Category I subsystems and components are designed are reviewed. 3. Procedures Used for Analytical Modeling. The information reviewed is similar to that described in subsection I.3 of SRP Section 3.7.2 but as applied to seismic Category I subsystems. 3.7.3-2 Revision 3 - March 2007 4. Basis for Selection of Frequencies. As applicable, criteria or procedures used to separate fundamental frequencies of components and equipment from the forcing frequencies of the support structure are reviewed. 5. Analysis Procedure for Damping. The information reviewed is similar to that described in subsection I.13 of SRP Section 3.7.2 but as applied to seismic Category I subsystems. 6. Three Components of Earthquake Motion. The information reviewed is similar to that described in