Document: NUREG-0800
Document ID: 45f5d841-54ef-4876-be3e-86eafc6ca90a
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/ML1235/ML12352A305.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.0
CFR Part: 
CFR Title: 

Content:
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 DC. Follow the same steps described above under A - COL Application Referencing an ESP and DC, 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 or 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. Site-specific GMRS are reviewed separately under SRP 2.5.2 for adequacy. ii. 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. 3.7.1-17 Draft Revision 4 - December 2012 Technical Rationale: The technical rationale for application of these requirements to reviewing this SRP section is discussed in the following paragraphs: 1. GDC 2 requires, in the