Both source-term and non-source-term models require observable data to perform
calculations. The only difference is whether you or the model perform the
calculation of input release conditions. For BREEZE EXPERT, the following
information is required:
- Chemical
- Storage temperature
- Storage pressure
- Hole size
- Depth of liquid in container above hole
- Maximum pool size
- Meteorological conditions
The calculations performed by EXPERT are designed to provide input to
non-source-term models including those in the BREEZE HAZ suite of dispersion
models (i.e., DEGADIS, SLAB, INPUFF and AFTOX). EXPERT requires information
about the following physical aspects of the release scenario:
- Vessel shape and dimensions
- Release location and orientation
- Diking
- Chemical database
- Release class
- Release duration, either specified by the user (reaction time) or computed
by EXPERT
EXPERT calculates the key model input parameters (e.g., pool evaporation rate,
emission rate, etc.) based on user-specified observables such as chemical
property data and storage, release, and ambient meteorological conditions.
It then recommends an appropriate dispersion model based upon the
calculated results and seamlessly transfers these results to the
dispersion model. The EXPERT algorithms are based primarily upon the
EPA's document entitled "Guidance on the Application of Refined
Dispersion Models to Hazardous/Toxic Air Pollutant Releases", April
1993. |
