Soil-Structure Analysis for ACR Nuclear Island
N. Alloety, A. Saudy, and M. Elgohary · NCSU Libraries Repository (North Carolina State University Libraries) · 2009
The Advanced CANDU Reactor ™ , (ACR-1000™) is designed by Atomic Energy of Canada Limited (AECL™) to meet its customer requirements in Canada and worldwide.ACR-1000 product is based on 700 MWe class and 900 MWe class CANDU™ reactors, offering nuclear power plants to a broad segment of the power generation market.The seismic design of the ACR-1000 nuclear power plant (NPP) complies with Canadian standards and also with International Atomic Energy Agency safety design standards and guides.The ACR-1000 standard design is based on a design ground response spectrum characterizing the richness of high-frequency in Eastern North America (ENA) rock sites, in addition to the design ground response spectra defined for soil and rock sites per the Canadian Standards Association (CSA).The standard design is based, as well, on seven design soil profiles defining the envelope of a wide range of foundation medium representing potential site conditions.The seismic analysis of the ACR-1000 nuclear island structures and the generation of floor response spectra needed for seismic qualification of the structures, systems and components that are important to safety take the effects of seismic soil-structure-interaction (SSI) into account.Time histories that are compatible with the design ground response spectra are used in the seismic analyses.A set of three time histories is developed using the spectral matching technique to represent the ENA-based design ground response spectrum.Two more sets of three time histories are developed to be compatible with the CSAbased design ground response spectra for soil and rock sites.This paper presents the findings of the seismic analyses of the ACR-1000 nuclear island structures.Lumped mass and consistent mass models representing the nuclear island are used in the analyses.A summary of the seismic SSI analysis methodology is presented.Key structural seismic response parameters for the nuclear island, founded on different design soil conditions, due to the design basis ground motions are determined and compared.