Document: NUREG-0800
Document ID: 78905d69-1945-4638-99b9-2db68eb3da77
Document Type: srp
Title: SEISMIC SYSTEM ANALYSIS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0520/ML052070318.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.2
CFR Part: 
CFR Title: 

Content:
staff concludes that the plant design is acceptable and meets the requirements of General Design Criterion 2 and Appendix A to 10 CFR Part 100. This conclusion is based on the following: The applicant has met the requirements of GDC 2 and Appendix 3.7.2-23 DRAFT Rev. 3 - April 1996 A to 10 CFR Part 100 with respect to the capability of the structures to withstand the effects of the earthquakes so that their 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 (Appendix A, 10 CFR Part 100), 2. Appropriate combination of the effects of normal and accident conditions with the effect of the natural phenomena, and 3. The importance of the safety functions to be performed (GDC 2)., and61 4. The use of a suitable dynamic analysis or a suitable qualification test to demonstrate that structures, systems, and components (SSCs) can withstand the 62 seismic and other concurrent loads, except where it can be demonstrated that the use of an equivalent static load method provides adequate consideration (Appendix A, 10 CFR Part 100). 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- resultedant loads with those resulting from normal and accident conditions in the design 63 of Category I structures as specified in SRP Sections 3.8.1 through 3.8.5 will be 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 Category I structures, systems, and componentsSSCs . It included review of procedures for modeling, seismic soil-structure 64 interaction, development of floor response spectra, inclusion of torsional effects, seismic analysis of Category I concrete dams, evaluation of Category I structure overturning, and determination of