NDLI: Joint Failure Importance for Noncoherent Fault Trees

Content Provider	IEEE Xplore Digital Library
Author	Lixuan Lu Jin Jiang
Copyright Year	1963
Abstract	There exist several risk importance measures in the literature to rank the relative importance among basic events within a fault tree. Most of the importance measures indicate how important a basic event is with respect to the top event of the fault tree. However, the mutual influence among the basic events should also be considered. This is particularly true in practice when making maintenance decisions with a limited resource. This paper investigates the Joint Failure Importance (JFI), which reflects the interaction among basic events, namely, the change in the Birnbaum Importance of one basic event when the probability of another basic event changes. Even though the JFI for coherent fault trees and its properties have been examined in the literature, the results cannot be easily extended to noncoherent fault trees. The current work has shown that, for both coherent, and noncoherent fault trees, the sign of the JFI can provide useful information. However, the properties of the JFI for noncoherent fault trees are more complex, and do not always share with those for coherent fault trees. The Shutdown System Number One (SDS1) in a Canadian Deuterium-Uranium (CANDU) Nuclear Power Plant (NPP) is utilized to illustrate the theoretical results developed in this paper.
Sponsorship	IEEE Reliability Society
Starting Page	435
Ending Page	443
Page Count	9
File Size	196658
File Format	PDF
ISSN	00189529
Volume Number	56
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fault trees Safety Power generation Bismuth Maintenance Reliability engineering Nuclear and plasma sciences Power engineering and energy Fault diagnosis Resource management probabilistic safety assessment Birnbaum importance Canadian deuterium-uranium nuclear power plant coherent fault tree joint failure importance noncoherent fault tree
Content Type	Text
Resource Type	Article
Subject	Safety, Risk, Reliability and Quality Electrical and Electronic Engineering

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