Évaluation de paramètres de sûreté de fonctionnement en présence d'incertitudes et aide à la conception : application aux Systèmes Instrumentés de Sécurité

Abstract : The use of safety related systems imposes to evaluate their dependability. Laboratory data and generic data are often used to provide failure data of safety components to evaluate their dependability parameters. However, due to the lower solicitation of safety systems in plant, safety components have not been operating long enough to provide statistical valid failure data. Furthermore, measuring and collecting failure data have uncertainty associated with them, and borrowing data from laboratory and generic data sources involve uncertainty as well. Our contribution is to propose a fuzzy approach to evaluate dependability parameters of safety systems when there is an uncertainty about dependability parameters of systems components. This approach is applied to determine the failure probability on demand of Safety Instrumented Systems (SIS) in presence of uncertainty. Furthermore, we present an optimal design of SIS by using reliability graphs and genetic algorithms to identify the choice of components and design configuration in a SIS to meet the required SIL
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Mohamed Sallak. Évaluation de paramètres de sûreté de fonctionnement en présence d'incertitudes et aide à la conception : application aux Systèmes Instrumentés de Sécurité. Autre [cs.OH]. Institut National Polytechnique de Lorraine, 2007. Français. ⟨NNT : 2007INPL065N⟩. ⟨tel-01752954⟩

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