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. Given that the seismic hazard curve of the location site of a plant, the fault tree and event tree models of this plant were known, if the capacities and responses of components were available, the conditional occurrence probability (or frequency) of the top event of the FT models could be estimated by using SECOM2-DQFM. In addition, the importance of each basic event as well as the occurrence frequency of each accident sequence could also be obtained. Further, the concurrent failure probability of multiple components due to earthquake is considered in SECOM2-DQFM by using the method of Direct Quantification of Fault Tree with Monte Carlo simulation. This report is the English translation of the Japanese version of the user's manual of SECOM2-DQFM.