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Dynamic safety analysis of process systems using nonlinear and non-sequential accident model

journal contribution
posted on 2023-05-19, 10:11 authored by Adedigba, SA, Faisal KhanFaisal Khan, Yang, M
Analysis of the safety and reliability of complex engineering systems is becoming challenging and highly demanding. In complex engineering systems, accident causation is a function of nonlinear interactions of several accident contributory factors. Traditional accident models normally use a fault and event trees sequential approach to predict cause-consequence relationships, which unable to capture real interaction thus have limited predictability of accident.This paper presents a new non-sequential barrier-based process accident model. The conditional dependencies among accident contributory factors within prevention barriers are modelled using the Bayesian network with various relaxation strategies, and non-sequential failure of prevention (safety) barriers. The modelling of non-linear interactions in the model led to significant improvement of the predicted probability of an accident when compared with that of sequential technique. This renders valuable information for process safety management. The proposed accident model is tested on a real life case study from the U.S. Chemical Safety Board.


Publication title

Chemical Engineering Research and Design








Australian Maritime College


Elsevier Ltd

Place of publication

United Kingdom

Rights statement

© 2016 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in engineering