Simulation of the Jack Rabbit Release Scenarios using SCIPUFF

SCIPUFF calculations of the Jack Rabbit release configurations for chlorine and ammonia are presented. The dispersion predictions use a calculated jet source term and model the flashing two-phase release and dense cloud dispersion effects using a high-resolution representation of the terrain elevation around the release. Simplified meteorology based on anemometer measurements of wind speed at the test site is used to perform calculations for a number of different test conditions. Concentration data from the actual tests was not available at the time of this study, but the dispersion results will be compared with measurements when the data processing is completed. However, the general behavior of the cloud, particularly the retention of the dense gas within the local depression surrounding the release location, is of interest and the SCIPUFF calculations do show strong effects of terrain at low wind speeds.