Lawrence Livermore National Laboratory

NARAC develops and maintains a suite of multi-scale atmospheric flow and dispersion models that predict the health-related effects and other impacts of atmospheric releases of radiological, chemical, and biological materials over local, regional, continental, and global scales. The models are supplemented by regularly-updated global databases of geographical data; radiological, chemical and biological material properties; and exposure-related information such as dose conversion factors, health risk levels, and protective action guides. A distributed system architecture couples together data, models, and product generation software to support both fully automated predictions and expert analyses conducted by NARAC staff. Some of the key features of this validated, real-time, operational modeling system include: