The Application of 3D QRA Technique to the Fire/Explosion Simulationand Hazard Mitigation within a Naphtha-Cracking Process

摘要

This research employed CFD fire and explosion simulation software, FLACS, to evaluaternthe possible hazards of different worst-case scenarios within a petrochemical plant. After the effectrnfactors (overpressure, impulse pressure, and thermal radiation temperature) were calculated, the resultsrnwere passed to a self-developed risk analysis module to evaluate the corresponding 3D individual riskrnvalue; the latter value can further be utilized as an index for assessing suitable preventive actionrnagainst specific hazard before any accident happens. The whole procedure was realized via applying arnpreliminary consequence analysis on a naphtha-cracking plant site. The simulation results canrnfacilitate the relevant personnel to understand all the variation conditions during the accident and canrnalso be used as a reference for emergency response planning. According to the research results, thernsize of the vapor cloud has great influence on the hazard consequence; besides, water spray system hasrnpotential to mitigate the severity of thermal radiation when a distillation tower is leaking. With thernaide of the 3D dynamic consequence simulation and risk analysis technique, the plant site safety canrnbe effectively secured via implementing the preliminary hazard assessment and various preventiverncontrol strategies.