Development of Worldwide Version of System for Prediction of Environmental Emergency Dose Information: WSPEEDI, (III). Revised Numerical Models, Integrated Software Environment and Verification.

The numerical models of WSPEEDI (Worldwide version of System for Prediction of Environmental Emergency Dose Information) were revised. The new models are formulated with a terrain following vertical coordinates with the compressibility of the atmosphere being considered. The models have been integrated into a computer code system together with system control software, worldwide geographic database, meteorological data pre-processor and graphics. The performance of the code system has been evaluated against the Chernobyl case with reliable source terms, well established meteorological input and a comprehensive monitoring database, which were provided in ATMES (Atmospheric Transport Model Evaluation Study) coordinated by IAEA, WMO and CEC.