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A Study on FMEDA Process for SIL Certification : A Case Study of a Flame Scanner

SIL 인증을 위한 FMEDA 프로세스 연구 : 화염검출기 사례를 중심으로

  • Kim, Sung Kyu (Department of Industrial and Management Engineering, Graduate School, Kyonggi University) ;
  • Kim, Yong Soo (Department of Industrial and Management Engineering, Kyonggi University)
  • 김성규 (경기대학교 대학원 산업경영공학과) ;
  • 김용수 (경기대학교 산업경영공학과)
  • Received : 2012.08.17
  • Accepted : 2012.10.03
  • Published : 2012.12.01

Abstract

In this article, we introduced the estimation method by 'Safety Integrity Level'(SIL) for the criterion of safety assurance and performed a case study on a flame scanner. SIL requires probabilistic evaluation of each set of equipment used to reduce risk in a safety related system. FMEDA(Failure Modes, Effects and Diagnostic Analysis) method is widely used to evaluate the safety levels and provides information on the failure rates and failure mode distributions necessary to calculate a diagnostic coverage factor for a part or a component. Basically, two parameters resulting from FMEDA are used for SIL classification of the device : SFF(Safe Failure Fraction) and PFD(Probability of Failure on Demand). In this case study, it is concluded that the flame scanner is designed to fulfill the condition of SIL 3 in the aspect of SFF and PFD.

Keywords

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