Abstract
A radioactive aerosol and vapor dispersion model, RADiM, has been developed to predict the distribution of acquired doses from radionuclides escaping into the atmosphere following a marine reactor accident. Designed as a decision aid for emergency response teams, RADiM is based on a Gaussian plume model, which considers decay and transmutation, as well as meteorological and terrain effects. An initially estimated source term can be adjusted for strength and composition, based on subsequent field survey measurements and gamma-spectroscopy. RADiM was validated using field release data and was compared to predictions from established codes. Possible accident scenarios were also examined.
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