Document: NUREG-0800
Document ID: 585516eb-af20-45dc-a470-9638ec9381f3
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/ML0706/ML070640306.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.0
CFR Part: 
CFR Title: 

Content:
ctor site applications on or after January 10, 1997, refers to 10 CFR 100.23 of this part for seismic criteria. 10 CFR 100.23 describes the criteria and nature of investigations required to obtain the geologic and seismic data necessary to determine the suitability of the porposed site and the plant design bases. Section 100.23 also refers to 10 CFR Part 50, Appendix S for the definition of the minimum SSE ground motion for use in design. SRP Section 3.7.1 describes acceptance criteria for developing the applicable levels of vibratory ground motion corresponding to the OBE and SSE which are used in the design of SSCs. These criteria ensure that the seismic design loads and the seismic design parameter values, being used as input into the seismic design analysis, are properly defined and are accurate or conservative. 3.7.1-17 Revision 3 - March 2007 Meeting these requirements provides assurance that appropriate engineering methods will be used to develop the OBE and SSE design loadings and to develop the seismic design parameters, needed to seismically qualify SSCs important to safety, and thereby ensure that they will be able to perform their intended safety function when subjected to these earthquake loads. 3. 10 CFR Part 50, Appendix S is applicable to applications for a design certification or combined license to 10 CFR Part 52 or a construction permit or operating license pursuant to 10 CFR Part 50 on or after January 10, 1997. For SSE ground motions, 10 CFR Part 50, Appendix S requires that SSCs will remain functional and within applicable stress, strain, and deformation limits. The required safety functions of SSCs must be assured during and after the vibratory ground motion through design, testing, or qualification methods. The evaluation must take into account SSI effects and the expected duration of the vibratory motion. If the OBE is set at one-third or less of the SSE, an explicit analysis or design is not required. If the OBE is set at a value greater