Cloud Chemistry of Fallout Formation
GULF GENERAL ATOMIC CO SAN DIEGO CA
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Calculations of fission-product distribution in fallout for the Small Boy event have been made using a condensed-state diffusion-controlled fission- product absorption model. The properties of calculated fission-product inventories in particles with size distribution supplied correlated reasonably well with properties of actual Small Boy fallout inventories. An evaluation of these inventories using the DELFIC fission-product distribution system is being made. Henrys law has been demonstrated to be applicable to the system cesiumO2CaO-Al2O3-SiO2 eutectic. The diffusion coefficients of cesium in Small Boy soil have been measured. These measurements provide some justification for employing diffusion coefficients of fission products in CaO-Al2O3-SiO2 eutectic for the Small Boy calculations. Studies of diffusion coefficients of fission products created in situ in silicate matrices have been initiated. Some preliminary fission-product leaching studies have been made. A program for studying the leaching of recoiled fission products from silicates is outlined. Mass spectrometric Knudsen cell studies have demonstrated the apparent importance of such species as CeO2g, PrO2g, NdO2g, and TcO3g to fallout formation processes.
- Radioactivity, Radioactive Wastes and Fission Products