Document: NUREG-0800
Document ID: f58a3e4a-be8a-4b75-8b11-b41b7a54a500
Document Type: srp
Title: SEISMIC DESIGN PARAMETERS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0523/ML052340564.pdf
Revision Date: 2023-06
Chapter: 3
Section ID: 3.7.1
CFR Part: 
CFR Title: 

Content:
the nuclear Industry and the general public of regulatory procedures and policies. Standard review plans are not substitutes for regulatory guides or the' Commission's regulations and compliance with them is not required. The standard review plan sections are keyed to the Standard Format and Content of Safety Analysis Reports for Nuclear Power Plants. 'Not all sections of the Standard Format have a corresponding review plan. Published standard review plans will be revised periodically, as appropriate, to accommodate comments and to reflect new Inform&- ti'n and experience. Comments and suggestions for Improvement will be considered and should be sent to the U.S. Nuclear Regulatory Commission. Office of Nuclear Reactor Regulation. Washington. D.C. 2055 smooth variation of properties with depth, the control point (location at which the control motion is applied) should be specified on the soil surface at the top of the finished grade. The free-field ground motion or control motion should be consistent with the properties of the soil profile. For sites composed of one or more thin soil layers overlying a competent material or in case of insufficient recorded ground-motion data, the control point is specified on an outcrop or a hypothetical outcrop at a location on the the top of the competent material. The control motion specified should be consistent with the properties of the competent material. (Note: This information is reviewed under the review responsibility of SRP Section 2.5.2.) a. Design Response Spectra Design response spectra are used in the design of seismic Category I structures, systems, and components, and they are generally specified in the free field. The proposed design response spectra for the operating basis earthquake (OBE) and safe shutdown earthquake (SSE) (Ref. 2) are reviewed against the free-field response spectra that are reviewed and accepted under SRP Section 2.5.2. The distinction between the free-field response spectra (site specific or