A new seismic source characterization model for the Central and Eastern United States (CEUS) is publicly available in a form suitable for use in Probabilistic Seismic Hazard Analysis (PSHA – for a PSHA example see NUREG/CR-6607) evaluations for regulatory activities (including Early Site Permit and Combined Operating License Applications for nuclear facilities). Input to a probabilistic seismic hazard analysis for nuclear facilities usually consists of both seismic source characterization and ground motion characterization [an objective of PEER NGA-East is to develop new ground motion characterization model for Central and Eastern North-America]. These characterizations are used to calculate probable hazard results (seismic hazard curves) at a particular site. The new CEUS seismic source model is based on improvements in available data and methods (USGS : Open-File Report 2011-1101).

CEUS Earthquake Catalog

The new CEUS source model replaces the Seismic Hazard Methodology for the Central and Eastern United States (NP-4726-1986 – paper volumes) and Seismic Hazard Characterization of 69 Nuclear Plant Sites East of Rocky Mountains (Bernreuter, 1989). The new seismic source model can be used in a Senior Seismic Hazard Analysis Committee (SSHAC, Budnitz, 1997) Level 3 assessment process as implemented by NUREG (Kammerer and Ake) in evaluating the seismic safety of nuclear facilities.

Two important American Society of Civil Engineers (ASCE) standards are also relevant for the structural engineering design and analysis of nuclear power plants: ASCE 4-98, “Seismic Analysis of Safety-Related Nuclear Structures and Commentary” and ASCE 43-05, “Seismic Design Criteria for Structures, Systems and Components in Nuclear Facilities” as well as a NUREG sponsored evaluation (NUREG/CR-6926 – 2007) of the latter ASCE standard.

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