All TopicsControl LOPA Simulator – Layers of Protection Analysis October 29, 2026 4instrumentation20 Layers of Protection (LOPA) Simulator Protection layer Layer Process: tank with level control Trigger fault (LV-101 fails open)Operator: close inlet manuallyReset Simulation speed0.5x1x2x4x Failure lab: make a layer fail 4 SIS: ESD valve stuck open 5 Relief device fails to lift 6 Bund wall breached 7 Gas detection fails 8 Plant emergency team ineffective What is happening
