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:
ethods used to ensure that the required safety functions are maintained during and after the vibratory ground motion associated with the SSE shall involve the use of either a suitable dynamic analysis methodology or an appropriate qualification test to demonstrate that all SSCs important to safety are capable of withstanding the seismic and other concurrent loads, including postulated accident loads, except where it can be demonstrated that the use of an equivalent static load analysis methodology provides adequate conservatism. The requirements of Appendix A to 10 CFR 100 assure that the applicable levels of vibratory ground motion corresponding to the OBE and the SSE are properly defined, and that adequate accuracy and/or conservatism are being applied in defining the system data being used for input into the seismic design analysis. Compliance with the requirements detailed in Appendix A to 10 CFR 100 in conjunction with implementation of the requirements provided in General Design Criterion 2, as discussed above, assures that that safety-related SSCs will continue to function following a seismic event, such that the plant can be brought to, and maintained in a safe shutdown condition. III. REVIEW PROCEDURES For each area of review, the following procedure is implemented. The reviewer will select and emphasize material from the procedures given below, as may be appropriate for a particular DRAFT Rev. 3 - April 1996 3.7.2-20 case. The scope and depth of review procedures must be such that the acceptance criteria described above are met. 1. Seismic Analysis Methods For all Category I structures, systems, and componentsSSCs , the applicable methods of 55 seismic analysis (response spectra, time history, equivalent static load) are reviewed to confirm that the techniques employed are in accordance with the acceptance criteria as given in subsection II.1 of this SRP section. If empirical methods or tests are used in lieu of analysis for any Category I structure, these