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:
nvelop the site-specific FIRS, then proceed to step viii. vi. When the site-specific FIRS and the CSDRS are determined at different elevations, the CSDRS-consistent spectra should be calculated at the foundations of each seismic Category I structure. 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 3.7.1-17 Revision 4 – December 2014 standard design is acceptable for that site, assuming no other issue is identified during the review process. If not, then proceed to step viii. vii. Perform an analysis of the seismic response of the facilities using the site-specific FIRS as input and an appropriate seismic analytical technique (e.g., method that considers the effects of incoherent ground motion). When such analytical methods are utilized, the detailed technical justifications are reviewed on a case-by-case basis. Further discussion on consideration of the effects of incoherent ground motion is provided in Subsection II.4.C (under the heading Input Ground Motion, Specific Guidelines for SSI Analysis) in SRP Section 3.7.2, “Seismic System Analysis.” The in-structure responses in terms of floor response spectra, building member forces, and deformations at key locations in the structure should be obtained using seismic analysis methods in SRP Section 3.7.2 II. The key locations for calculating the in-structure responses, proposed by the licensee, should be evaluated to ensure that they are sufficient to represent the various locations throughout the building. Locations should include responses at peripheral locations to detect rocking and torsion, and should include responses to check overturning, torsional, and sliding stability of the structures. The dynamic models and analysis techniques should be sufficiently refined to be able to capture the response of the structures throughout the frequency range of interest, including the high frequency