Abstract:

The conception of incomplete common cause failure (ICCF) is proposed, and the common cause is considered to  affect components in a commoncause group only with a certain probabilities accompanied with a certain degrees of  damage. The common logic gates of a dynamic fault tree analysis method are introduced, and based on it, a new logic gate  is introduced for describing ICCF efficiently. Moreover, the problem existing in the Markov chain method of dynamic fault  tree model of systems subjected to ICCF is pointed out, the state transition diagram is revised, and the reliability  analytical formula of systems subjected to ICCF is proposed. The availability of the proposed approach is illustrated  by a quantitative analysis of an example system.