Document: NUREG-0800
Document ID: ffb3ee99-28a1-4f1d-b2ef-a30d194f409a
Document Type: srp
Title: -
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML1319/ML13198A223.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.2
CFR Part: 
CFR Title: 

Content:
Revision 4 – September 2013 requirements of GDC 2 and 10 CFR Part 50, Appendix S with respect to the capability of the structures to withstand the effects of earthquakes so that the design reflects: 1. Appropriate consideration for the most severe earthquake recorded for the site with an appropriate margin (GDC 2). Consideration of two levels of earthquakes (10 CFR Part 50, Appendix S), 2. Appropriate combination of the effects of normal and accident conditions with the effect of the natural phenomena, 3. The importance of the safety functions to be performed (GDC 2), and 4. The use of a suitable dynamic analysis or a suitable qualification test to demonstrate that SSCs can withstand the seismic and other concurrent loads, except where it can be demonstrated that the use of an equivalent static load method provides adequate consideration (10 CFR Part 50, Appendix S). The applicant has met the requirements of item 1 listed above by use of the acceptable seismic design parameters as per SRP Section 3.7.1. The combination of earthquake- resultant loads with those resulting from normal and accident conditions in the design of seismic Category I structures as specified in SRP Sections 3.8.1 through 3.8.5 is in conformance with item 2 listed above. The scope of review of the seismic system and subsystem analysis for the plant included the seismic analysis methods for all seismic Category I SSCs. It included review of procedures for modeling, seismic SSI, development of floor response spectra, inclusion of torsional effects, seismic analysis of seismic Category I concrete dams, evaluation of seismic Category I structure overturning, and determination of composite damping. The review included design criteria and procedures for evaluation of the interaction of non- seismic Category I structures with seismic Category I structures and the effects of parameter variations on floor response spectra. The review also included criteria and seismic analysis procedures for seismic