Document: NUREG-0800
Document ID: a3c4cb91-c557-4043-bb50-8da01264de08
Document Type: srp
Title: Each calculated spectrum of the artificial time history is considered
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340564.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.0
CFR Part: 
CFR Title: 

Content:
urated site conditions. 3. Supporting Media for Category I Structures To be acceptable, the description of supporting media for each Category I structure must include foundation embedment depth, depth of soil over bed- rock, soil layering characteristics, design groundwater elevation, dimen- sions of the structural foundation, total structural height, and soil properties such as shear wave velocity, shear modulus, Poisson's ratios, and density as a function of depth. III. REVIEW PROCEDURES For each area of review, the following review procedure is followed. The reviewer will select and emphasize material from the procedures given below as may be appropriate for a particular case. The scope and depth of review procedures must be such that the acceptance criteria described above are met. 1. Design Ground Motion a. Design Response Spectra Design response spectra for the OBE and SSE for all damping values are checked to ensure that the spectra are in accordance with the accept- ance criteria as given in subsection II. Any differences between the free-field spectra and the proposed design response spectra that have not been adequately justified are identified, and the applicant l is informed of the need for additional technical justification. b. Design Time History Methods of defining the design time histories are reviewed to confirm that the acceptance criteria of subsection II.2 of this SRP section are met. 2. Percentage of Critical Damping Values The specific percentage of critical damping values for the OBE and SSE used in the analyses of Category I structures, systems, and components are checked to ensure that the damping values are in accordance with the acceptance criteria as given in subsection II.2 of this SRP section. Any differences in damping values that have not been adequately justified are identified, and the applicant is informed of the need for additional technical justification. 3.7.1-8 Rev. 2 - August 1989 3. Supporting Media for Category I Structures