Probabilistic Safety Assessment and Management pp 2888-2893 | Cite as
Accident Sequence Analysis of Fault Tree with Event Sequence Dependency
Abstract
Conventional fault trees composed of AND and OR logic gates do not consider event sequence dependency. This paper presents a simple evaluation method for fault trees containing AND and OR gates plus priority AND gates, which restrict the occurrence order of basic events. Basic logical operations of priority AND gates with conventional logic gates are given. Due to these simple operations, not only the minimal cut set derivation procedure, but also the inclusion-exclusion method can be applied in the same way as coherent fault trees. An illustrative example of a standby system shows the merits and characteristics of the proposed method.
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