Several studies have been conducted to assess safety risks ofNGTS [4,5,8,11,13–15]. Most ofthe previous studies, however, havemerely focused on gas pipelines whereas the work devoted to otherimportant components of NGTS such as gas stations has been veryfew. In addition to the limited scope of the previous work, most ofthe methods used for QRA in previous studies suffer from limitations such as being statistic, incapable of handling data scarcity anddata uncertainties, and inability to consider dependencies [