Abstract
In order to steadily supply gas at a fair price over an extended period of time, it is necessary for gas companies to assemble optimal production and supply facilities which are able to handle an increase in demand with an adequate level of reliability. To address the need, Tokyo Gas Co., Ltd. and Mitsubishi Heavy Industries, Ltd. have jointly developed a system capable of quantitative evaluation of reliability based on the “Fault Tree Analysis Method (FTA)”, and have assembled it into a system using an engineering work station. The features of the system are the function for the constructing fault trees automatically based on input diagrams which are similar to P & ID, one line diagram, and so forth, the function for drawing input diagrams graphically and the functin for the calculating reliability indices. This paper gives a summary of the approach used in the constructing fault trees, the method for calculating the reliability indices and an example of the reliability analysis of the LNG terminal.
