Title :
Modeling and reliability assessment of a 3-channel safety-instrumented system
Author :
Liu, Y.L. ; Rausand, Marvin ; Jin, Hye-Jin
Author_Institution :
Dept. of Production & Quality Eng., Norwegian Univ. of Sci. & Technol., Trondheim, Norway
Abstract :
Safety-instrumented systems (SISs) are often crucial in the prevention of accidents. In this study, several reliability assessment methods, including the approximation formulas in IEC 61508 and in the PDS handbook, and Markov and Petri net methods, are used to determine the reliability of a redundant SIS configuration with three parallel channels. The average probability of failure on demand (PFDavg) is used as reliability measure, and common cause failures and proof tests are considered in the modeling. The results obtained by the different methods are compared, and characteristics of these methods in SIS reliability analysis are discussed.
Keywords :
IEC standards; Markov processes; Petri nets; accident prevention; condition monitoring; failure analysis; probability; reliability; 3-channel safety-instrumented system; IEC 61508; Markov method; PDS handbook; Petri nets; SIS reliability assessment; accident prevention; probability-of-failure-on-demand; proof tests; redundant SIS configuration; Approximation methods; Firing; IEC standards; Maintenance engineering; Markov processes; Reliability; Safety; Markov method; PFDavg; Petri net; Safety-instrumented system; reliability;
Conference_Titel :
Industrial Engineering and Engineering Management (IEEM), 2012 IEEE International Conference on
Conference_Location :
Hong Kong
DOI :
10.1109/IEEM.2012.6838116
