User's manual of SECOM2-DQFM; A Computer code for seismic system reliability analysis

Liu, Q.; Muramatsu, Ken; Uchiyama, Tomoaki*

SECOM2-DQFM is developed for seismic reliability analysis of complex engineering systems, such as nuclear power plants. Suppose that the seismic hazard curve of the location site of a plant, the fault tree model and the event tree model of this plant are known. If the capacities and responses of components are available, the conditional occurrence probability (and frequency) of the top event of the fault tree model can be estimated by using SECOM2-DQFM. In addition, the importance of each basic event as well as the occurrence probability (and frequency) of each accident sequence can also be calculated. One feature of SECOM2-DQFM is that the method of Direct Quantification of Fault Tree using Monte Carlo simulation (DQFM) is adopted to evaluate the concurrent failure probability of multiple components. This report is summarized as the user manual of SECOM2-DQFM.