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:
REVIEW RESPONSIBILITIES Primary - Structural and Geosciences Branch (ESGB) Secondary - None I. AREAS OF REVIEW The following areas relating to seismic design parameters are reviewed: 1. Design Ground Motion For the seismic design of nuclear power plants, it is customary to specify the earthquake ground motion that is exerted on the structure or on the soil-structure interacting system. The design ground motion, sometimes known as the seismic input or control motion, is based on the seismicity and geologic conditions at the site and expressed in such a manner that it can be applied to the dynamic analysis of structures. The three com- ponents of the design ground motions for the operating basis earthquake (OBE) and safe shutdown earthquake (SSE) are reviewed. They should be consistent with the description of the free-field ground motion at the site provided in SRP Section 2.5.2, which includes the variation in and distribution of ground motion in the free field, sources and directions of motion, propagation and transmission of seismic waves, and other site response characteristics. The control motion should be defined to be on a free ground surface and should be based on data obtained in the free field (Ref. 1). Two cases are identified depending on the soil characteristics at the site and subject to availability of appropriate recorded ground-motion data. When data are available, for example, for relatively uniform sites of soil or rock with Rev. 2 - August 1989 USNRC STANDARD REVIEW PLAN Standard review plans are prepared for the guidance of the Office of Nuclear Reactor Regulation staff responsible for the review of applications to construct and operate nuclear power plants. These documents are made available to the public as part ef the Commission's policy to Inform 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