The purpose of this General Specification is to define the methodology and the general principles to be adopted for the Safety Integrity Level (SIL) assignment of Safety Integrated Functions (SIF).
\SIL assignment
Contents
- Scope.................................................................................
- Purpose........................................................ 3
- Application........................................................... 3
- Reference documents.............................................................. 4
- Terminology and definitions.................................................. 5
- Overall SIL Concept and Methodology.............................. 10
- SIL Concept......................................................... 10
- SIL Assessment Methodology......................... 11
- SIL Assignment Methodology............................... 11
- Schedule of SIL Assignement............................................... 12
- Pre-requisites/ Preparation works to SIL Assignment Workshop........ 12
- SIL Assignment......................................... 13
- Next steps................................................... 13
- Identification of SIF........................................................... 13
- Calibrated Risk-Graph Methodology............................... 14
- LOPA Methodology............................................................... 24
- Objectives................................................. 24
- Application................................................ 24
- Methodology........................................................ 25
- LOPA Organization........................................ 28
- Specific Requirements for HIPS............................................... 28
Appendix 1 SIF and SIL tables .................................................. 30
Appendix 2 Rule sets ............................................................ 32
Appendix 3 Extracts f.......................................................................... 34
Appendix 4 Risk-graph calibration for production outage ....................... 36
Appendix 5 Conducting a SIL assignment workshop ............................ 37
Appendix 6 LOPA Worksheet ............................................................... 40
Appendix 7 LOPA organisation .............................................................. 41
Bibliography ................................................................................................. 42
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