Document: NUREG-0800
Document ID: 2d2b9404-d124-483c-971a-a8f564048299
Document Type: srp
Title: SEISMIC DESIGN PARAMETERS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070640306.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.1
CFR Part: 
CFR Title: 

Content:
cracking, gaps, and other effects that tend to alter response amplitude. In real structures, it is often impossible to separate "true" material damping from system damping, which is the measure of the energy dissipation, from the nonlinear effects. Overall structural damping used in design is normally determined by observing experimentally the total response of the structure. Damping values assigned to members of seismic Category I SSCs, including material damping and system damping, are reviewed. When applicable, the basis for any damping values that differ from those given in Regulatory Guide (RG) 1.61 is reviewed. 3. Supporting Media for Seismic Category I Structures. The description of the supporting media for each seismic Category I structure is reviewed, including foundation embedment depth, depth of soil over bedrock, soil layering characteristics, highest groundwater elevation, dimensions of the structural foundation, total structural height, topographical conditions of the sites, and soil properties to permit evaluation of the applicability of finite-element or lumped-spring approaches for soil-structure interaction analysis. 4. Review Considerations for DC and COL Applications. For a DC application, the postulated seismic design response spectra is reviewed. The input or control location for the postulated seismic design response spectra is also reviewed. The postulated seismic design response spectra will become the certified seismic design response spectra (CSDRS) when the design receives approval by the Commission under 10 CFR Part 52. For a COL application referencing a certified design, the demonstration that the CSDRS envelops the site-specific GMRS is reviewed. 5. Inspections, Tests, Analyses, and Acceptance Criteria (ITAAC). For design certification (DC) and combined license (COL) reviews, the staff reviews the applicant's proposed ITAAC associated with the SSCs (if any are identified related to this SRP section) in accordance with SRP Section