It was composed computer program of fault tree analysis using numerical simulation,that is called Fault Tree Simulation Program (SIMPOK). This program can be used for qualitative analysisi.e. to determine minimal cut-set (MCS), and quantitative analysis i.e. to calculate frequency anduncertainty of top event. The test was conducted and compared to Monte Carlo Program. The programsuccesfully operated and the calculation result was relatively the same as Monte Carlo.Keywords: computer program, fault tree, simulation, minimal cut-setHaendra Subekti; Direktorat Perijinan Instalasi Nuklir - BAPETEN
