Verification and validation of Phast consequence models for accidental releases of toxic or flammable chemicals to the atmosphere

摘要

Consequence modelling software for accidental releases of flammable or toxic chemicals to the atmosphere includes discharge modelling, atmospheric dispersion modelling and evaluation of flammable and toxic effects. Scenarios which may be modelled includes releases from vessels (leaks or catastrophic ruptures), short pipes or long pipes. Releases considered include releases of sub-cooled or superheated liquid (with or without rainout), or vapour; un-pressurised or pressurised releases; and continuous, time-varying or instantaneous releases. For flammables, ignition may lead to rising fireballs, jet fires, pool fires and vapour cloud fires or explosions.