Title :
Common cause failure effect analysis for PFDavg uncertainty
Author :
Bin, Zhang ; Xianhui, Yang ; Rongxue, Kang
Author_Institution :
Dept. of Autom., Tsinghua Univ., Beijing
Abstract :
When evaluating safety integrity level of safety instrumented system, uncertainties are often brought into the analysis and will work on the result. This article explains where uncertainties come from and mainly discuss the problem of common cause failure. Based on the simple beta factor model referred in IEC61508, we introduce an advanced Improved Beta Factor Model to reduce the uncertainty of the safety index PFDavg better. The result from calculating common cause failure or not is compared, as well as different beta factor models.
Keywords :
IEC standards; failure analysis; safety systems; uncertain systems; IEC61508; PFDavg uncertainty; common cause failure effect analysis; safety instrumented system; safety integrity level; simple beta factor model; Automation; Cause effect analysis; Failure analysis; Instruments; Moon; Process control; Safety; Uncertainty; Common Cause Failure(CCF); Improved Beta Factor Model(IBF); Safety Instrumented Systems(SIS); Safety Integrity Level(SIL); Simple Beta Factor Model(SBF);
Conference_Titel :
Control Conference, 2008. CCC 2008. 27th Chinese
Conference_Location :
Kunming
Print_ISBN :
978-7-900719-70-6
Electronic_ISBN :
978-7-900719-70-6
DOI :
10.1109/CHICC.2008.4605419
