Transcription of Appendix 1: Process for Defining SIS Proof Testing ...
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Appendix 1: Process for Defining SIS Proof Testing ...
Appendix 1: Process for Defining SIS Proof Testing Requirements PFD CalculationCan FMbe revealed by direct Testing at PTIMAINTENANCE PHASENOTE 1 YNIdentify failure modes (FMs) of all SIS componentsCan FMbe revealed by other methods at PTI?Redesign SISU pdate PFD calc to show effects of partial testingPFD requirements met?NOTE 2 NOTE 3 NOTE 4 NOTE 7 YNNNOTE 5 For each FM of each SIS componentYPartial Testing Valid optionDESIGNPHASEPFD requirements met?All FMs revealed?Record direct, other or partial test methodNNYYNYNOTE 6 NOTE 8 SRSSIS designFailure dataRepair timesPlant availabilityProof Test IntervalsProof Test Procedures Figure 1: Process for the management of Proof Testing Requirements Notes to Figure 1 Note 1: The SIS design and PFD calculation might be as a result of a new (or modified) SIS or a review of legacy SIS.
Notes to Figure 1 Note 1: The SIS design and PFD calculation might be as a result of a new (or modified) SIS or a review of legacy SIS. See guidance below on ‘PFD
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