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Impact of gas detection coverage on SIF SIL Rating continued Scenario Based Illustrations
Three different scenarios are illustrated. 1) 100% (perfect) detection coverage 2) 99% detection coverage 3) 95% detection coverage For each scenario, 5 sets of calculations are presented. 1) No FGS present 2) SIL1 rated FGS present 3) SIL2 rated FGS present 4) SIL3 rated FGS present 5) Summary of risk reduction achieved Mitigation effectiveness is assumed to be always perfect when a FGS is present (i.e. mitigation effectiveness factor = 1). The frequency of gas leaks is assumed to be not more than once per year (i.e. Funmitigated =1). Scenario 1: 100% (perfect) detection coverage  Click image to enlarge Scenario 2: 99% detection coverage Click image to enlarge Scenario 3: 95% detection coverage Click image to enlarge Continue article here...Copyright ©2008 General Monitors, Inc. All logos, brand and product names are registered trademarks of their perspective owners. All rights reserved. Questions or comments to etech@generalmonitors.com |
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