Document: NUREG-0800
Document ID: 585516eb-af20-45dc-a470-9638ec9381f3
Document Type: srp
Title: Each calculated spectrum of the artificial time history is considered to envelop
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0706/ML070640306.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.0
CFR Part: 
CFR Title: 

Content:
equency responses, typically expected in the central and eastern United States (CEUS) regions. The SSI analysis shall also consider the site-specific soil variability (i.e., best estimate, lower bound estimate, and upper bound 3.7.1-15 Revision 3 - March 2007 estimate). Compare these responses at the key locations in the structure to the standard design in-structure responses. If the CSDRS responses envelop the in-structure responses from the FIRS, the standard design is acceptable assuming no other issue is identified during the review process. If the responses are not enveloped, additional analyses are required to demonstrate the acceptability of the design or the design might need to be modified. If further analyses are utilized, then the analyses must consider the potentially higher responses at all locations, not only those at the key locations described above. B. COL Application Referencing a CD. Follow the same steps described above under A - COL Application Referencing an ESP and CD, except that step iv. does not apply to this case. C. COL Application Referencing an ESP. In addition to the criteria presented below, Figure 3 in Appendix D provides additional guidance in understanding the process when a certified design is not used. i. Site-specific GMRS are reviewed separately under SRP 2.5.2 for adequacy. For COL application referencing an ESP, the GMRS are included in the ESP. ii. Confirm that the ESP conditions have been met or review the COL applicant’s approach to address any deviations. iii. Follow the acceptance criteria described in subsection II.1.A (excluding subsection II.1.A.ii), of this SRP Section to develop the seismic design response spectra. The seismic SSI analysis would then follow the conventional approach for SSI analyses. D. COL Application not Referencing an ESP and DC. In addition to the criteria presented below, Figure 3 in Appendix D provides additional guidance in understanding the process when a certified design is not used. i.