Using Event Tree to obtain Coefficient Reliability System

This paper is to discuss the use of methods developed for calculation of the reliability of structures as a general tool presented Event Tree Analysis. By applying this method the analyst is enabled to model the system, the uncertainties and the parameter correlations separately and systematically. Event tree analysis is widely used for reliability and safety analyses as it can be used to specify how the system behaves under various failure conditions. In this paper we could show Modeling Event Tree (ET) to obtain reliability system or machines. Independent Protection Layers (IPLs) used in structure are presented. Each IPL is assigned a Probability of Failure on Demand (PFD). A mitigated event likelihood is calculated by multiplying the initiating cause likelihood by the PFDs for the applicable IPLs. The mitigated event likelihood is then compared to a criterion linked to the corporation's criteria for unacceptable risk levels. Additional IPLs can be added to reduce the risk.

کلیدواژه ها:

Event Tree ، IPL ، Reliability