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:
included in the ESP. ii Confirm that the criterion for the minimum required response spectrum (in accordance with subsection II.1.A.ii) has been satisfied. iii. Confirm that COL action items contained in the DC have been met. This includes seismic design parameters such as soil layering assumptions used in the certified design, range of soil parameters, shear wave velocity values, and minimum soil bearing capacity. Technical justification for all deviations from the range of values used in the standard plant design must be provided for review. iv. Confirm that the ESP conditions have been met or review the COL applicant’s approach to address any deviations. v. When the site-specific GMRS and the CSDRS, are calculated at the same elevation, confirm that the CSDRS envelop the GMRS. For this case the standard design is acceptable for that site, assuming no other issue is identified during the review process. If the CSDRS do not envelop the site-specific GMRS then proceed to step vii. vi. When the site-specific GMRS and the CSDRS are determined at different elevations, calculate the site-specific GMRS transferred to the base elevations of each seismic Category I foundation. These site-specific GMRS at the foundation levels are referred to as FIRS and are derived as free-field outcrop spectra; that is, only the effects of materials that are below the base elevation of the seismic Category I structure are included in the site response analysis. For each seismic Category I structure foundation, if the CSDRS-consistent spectra at the foundation level envelop the site-specific FIRS at the foundation level, the standard design is acceptable for that site, assuming no other issue is identified during the review process. If not, then proceed to step vii. vii. Perform an SSI analysis using the site-specific FIRS and an advanced seismic analytical technique (e.g., method that considers the effects of incoherent ground motion). When such analytical methods are utilized, the