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).
|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.