Document: NUREG-0800
Document ID: 94da2f11-6df6-47d0-a25e-edeb21a4d649
Document Type: srp
Title: 3.7.1-12
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1419/ML14198A460.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.0
CFR Part: 
CFR Title: 

Content:
ismic inputs to the analysis of seismic 3.7.1-22 Revision 4 – December 2014 Category I SSCs are adequately defined so as to form a conservative basis for the design of such SSCs to withstand seismic loadings. The CSDRS used in the certified design of seismic Category I SSCs meet the requirements of Appendix S to 10 CFR Part 50 by either: (1) demonstrating that the CSDRS meet or exceed the site-specific FIRS reviewed under this SRP Section and meet or exceed the minimum required response spectrum specified in 10 CFR Part 50, Appendix S, or (2) by showing that the design resulting from application of the CSDRS is still adequate to resist design demands resulting from the analysis conducted using the site-specific FIRS. The design response spectra used in a non-standard plant for design of seismic Category I SSCs meet the requirements of Appendix S to 10 CFR Part 50, since they meet or exceed the site-specific FIRS reviewed under this SRP Section and meet or exceed the minimum required response spectrum specified in Appendix S to 10 CFR Part 50. The design response spectra used in these seismic analyses include definition of the appropriate spectra at the foundation (FIRS). In addition, the definition of PBSRS is included to ensure that the deterministic soil profiles used for SSI analyses meet the performance goal. The FIRS together with the deterministic soil profiles form the design basis for the seismic analysis of the facilities. For DC and COL reviews, the findings should also summarize the staff’s evaluation of requirements and restrictions (e.g., interface requirements and site parameters) and COL action items relevant to this SRP section. In addition, to the extent that the review is not discussed in other SER sections, the findings should summarize the staff's evaluation of the ITAAC, including design acceptance criteria, as applicable. V. IMPLEMENTATION The staff uses this SRP section in performing safety evaluations of DC applications and license