SEPSA is a seismic probabilistic risk assessment (SPRA) software with intuitive graphical user interface and efficient computation for modeling and analyzing seismic hazard at nuclear power plants.

SEPSA

This software efficiently estimates annual frequency of unaccepted performance, such as core melt and radiation release of a nuclear power plant through integrating data from accident sequences, seismic hazard, structural responses, and fragility curves of structural and nonstructural components.

Event tree

Event tree analysis combined with Boolean Method and Monte Carlo Method provides a more accurate estimation. The structural analysis data are augmented during the process to increase the accuracy of the risk estimation. However, the increased computations remains efficient with parallelism.

Results

SEPSA’s friendly user interface and efficient computation abilities greatly simplified the process of the risk assessment and hopefully will induce more applications of seismic probabilistic risk assessment that eventually provides safer homes and work places for people.