Understanding Atmospheric Dispersion of Accidental Releases
This SACHE product is a relatively short CCPS concept book that includes a basic description of the processes involved in accidental releases of chemicals and the resulting downwind concentrations of gases, vapors, and aerosols. It describes the complex physics of neutrally buoyant vapors, dense-vapors, high-momentum releases, boiling and evaporating liquids, multiphase flow, and aerosol releases.
The focus of this document is not on the calculation methods, but on the physical problem descriptions. This information will give the reader an excellent background to understand the assumptions and results of dispersion analysis useful in developing emergency response plans or as a part of a process hazard analysis. The document is also a useful tool to assess methods to prevent or mitigate releases.
The material is intended only as a basic introduction to dispersion modeling and the interested reader is encouraged to consult the cited references for further information.