Computationally Efficient Seismic Risk Analysis for Nuclear Energy Facilities

Abstract

A simplified Vector-valued Seismic Risk Analysis (VSRA) approach is developed for nuclear energy facilities. The seismic hazard model from Vector-valued Probabilistic Seismic Hazard Analysis is simplified based on Vector-valued Seismic Hazard Deaggregation (VSHD). Numerical integrations in the standard formulation of vector-valued PSHA are then avoided. Ground motion parameters used for further structural analysis can be obtained directly from the result of VSHD. Numerical results show that the proposed approach greatly improves the efficiency of seismic risk analysis without losing computational accuracy and resorting to extensive PSHA from seismologists.