Guidelines for Chemical Process Quantitative Risk Analysis (PDF, 8.7 MB)
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| Pitfall | Fix (per CPQRA guidelines) | |---------|----------------------------| | Ignoring toxic effects for flammable scenarios | Always model both fire/explosion and toxic release if H₂S or Cl₂ present. | | Using outdated failure rates | Use the guide’s tables but update from OREDA (2015+). | | Overlooking domino effects | Add frequency of secondary vessel rupture (Chapter 9). | | Misapplying weather probabilities | Use site-specific wind rose, not generic Pasquill classes alone. | not generic Pasquill classes alone. |