Document: NUREG-0800
Document ID: 45f5d841-54ef-4876-be3e-86eafc6ca90a
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/ML1235/ML12352A305.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.0
CFR Part: 
CFR Title: 

Content:
mpliance with the applicable regulatory position in RG 1.61. If other methods for correlation of damping values with stress level are used, they will need to be reviewed and accepted on a case-by-case basis. The material soil damping for foundation soils must be based upon validated values or other pertinent laboratory data, considering variation in soil properties and strains within the soil, and must include an evaluation of dissipation from pore pressure effects as well as material damping for saturated site conditions. The maximum soil damping value acceptable to the staff is 15 percent. 3. Supporting Media for Seismic 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 bedrock, soil layering characteristics, design groundwater elevation, dimensions 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. If the minimum shear wave velocity of the supporting foundation material is less than 1,000 fps, additional studies need to be performed which consider the average shear wave velocity, and its degree of variability addressing potential impact on soil-structure interaction, potential settlements and design of foundation elements. 4. Review Considerations for DC and COL Applications A. COL Application Referencing an ESP and DC In addition to the criteria presented below, Figures 1 and 2 in Appendix D provide additional guidance in understanding the Part 52 process. i. Site-specific GMRS are reviewed separately under SRP 2.5.2 for adequacy. For COL application referencing an ESP and DC, the GMRS 3.7.1-15 Draft Revision 4 - December 2012 are included in the ESP. ii Confirm that the criterion for the minimum required response spectrum (in accordance with subsection II.1.A.ii) has been satisfied. iii. Confirm that COL action items contained