Study of sampling techniques for dynamic PRA

Kubo, Kotaro   ; Zheng, X. ; Tanaka, Yoichi; Tamaki, Hitoshi ; Sugiyama, Tomoyuki 

Many institutes are developing dynamic PRA as method to improve the completeness and realism of conventional PRA. In the case of the dynamic PRA using the Monte Carlo method, a large number of thermal-hydraulic analyzes need to be performed in order to obtain a highly accurate result, and the calculation cost increases. However, if an appropriate sampling method is applied, it is considered that a result can be efficiently obtained with a small number of trials. Therefore, in addition to the Monte Carlo method, a trial analysis was performed using the Latin Hypercube method, the grid point sampling method, and the quasi-Monte Carlo method.