Barrières de sécurité et tests de révision

Abstract : Safety barriers take an important part of industrial risk management. Even if these systems are not triggered frequently, when an initiating event occurs (overpressure, overflow, etc.), they aim at preventing undesired events on people, environment, and goods. Proof tests have therefore to be performed in order to check the functional state of the safety barriers and, if required, to perform the appropriate maintenance actions. Dependability criteria have then to be assessed by a practical model. A set of general formulas is proposed for the probability of failure on demand (PFD) assessment of systems subject to partial and full tests. Partial tests (e.g. visual inspections, imperfect testing) may detect only some failures, whereas owing to a full test, the system is restored to an as good as new condition. Following the proposed approach, and according to an example, performance estimations of the system and test policies are presented, by using the feedback from previous tests. An optimization of the partial test distribution is also proposed, which allows reducing the average probability of system failure on demand.
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Journal articles
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  • HAL Id : ineris-01869280, version 1

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Dominique Charpentier, Florent Brissaud. Barrières de sécurité et tests de révision. Rapport Scientifique INERIS, 2010, 2009-2010, pp.66-68. ⟨ineris-01869280⟩

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