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Allocation de niveau d'intégrité de sécurité (SIL) requis conformément à la norme CEI 61511

Abstract : The IEC 61511 standard concerns functional safety for safety instrumented systems (SIS) application in Process Industries. The standard requires to carry out process hazard and risk assessment in order to deduce SIS specifications. Two main concepts, which are fundamental according to the application, are underlined: safety lifecycle and safety integrity levels. This article mostly deals with the safety integrity levels (SIL) and with their allocation, depending on the SIS considered. This international standard describes various quantitative and qualitative methodologies for SIL allocation. The choice between these methods will depend on various criteria as illustrated in this paper. The paper makes a brief description of three spread methods in the Process Industries. The selected criteria for each method are presented. Advantages and disadvantages of these various methods are indicated. In order to illustrate the methodology of a SIL allocation, a case study on a storage unit of ammonia is presented
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Submitted on : Friday, March 21, 2014 - 2:12:41 PM
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  • HAL Id : ineris-00963119, version 1
  • INERIS : EN-2008-137

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Brice Lanternier, Ahmed Adjadj. Allocation de niveau d'intégrité de sécurité (SIL) requis conformément à la norme CEI 61511. Revue Internationale sur l'Ingénierie des Risques Industriels, 2008, 1 (1), pp.34-45. ⟨ineris-00963119⟩

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