Includes methods to estimate the discharge rate and duration of a gas or liquid release from a tank or pipeline, the size of a liquid pool, the rate at which a liquid pool will evaporate or boil, the overpressure and heat generated from explosions and fires, and the downwind chemical concentration and hazard zones. It is used for consequence modeling in relation to the design of new facilities, in risk assessment studies, and in developing emergency plans for currently operating facilities. It is used for emergency response planning and vulnerability analysis. Methods are included to estimate the discharge rate and duration of releases from tanks or pipelines and size and evaporation rate of liquid pools. A high momentum jet model, special algorithms to model hydrogen fluoride and titanium tetrachloride, and models for a variety of fire and explosion scenarios are included.
Output is presented in text and graphical forms.
An optional enhancement allows in-depth evaluation of impact on population. The model uses real-time meteorological data for modeling, has optional complex terrain modeling capabilities, and can interface with toxic gas sensors. Developed by the Lawrence Livermore National Laboratory, SLAB is a dense gas model for various types of releases including a ground-level evaporating pool, an elevated horizontal jet, a stack or elevated vertical jet, and an instantaneous volume source. The model solves conservation equations of mass, momentum, energy, and species for continuous, finite duration, and instantaneous releases. The models provide information about outflow, behavior immediately after release, dispersion, and fires and explosion.