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On Reliability Performance of Safety Instrumented Systems with Common Cause Failures in IEC 61508 Standard

공통원인고장을 고려한 안전제어시스템의 신뢰성 평가척도에 관한 고찰 : IEC 61508을 중심으로

  • Seo, Sun-Keun (Department of Industrial and Management Systems Engineering, Dong-A University)
  • 서순근 (동아대학교 산업경영공학과)
  • Received : 2012.07.27
  • Accepted : 2012.09.11
  • Published : 2012.12.01

Abstract

The reliability performance measures for low and high or continuous demand modes of operation of safety instrumented systems(SISs) are examined and compared by analyzing the official definitions in IEC 61508 standard. This paper also presents a status of common cause factor(CCF) models used in IEC 61508 and problems relating CCF modelling are discussed and ideas to solve these ones are suggested. An example with mixed M-out-of-N architecture is carried out to illustrate the proposed methods.

Keywords

References

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