Concentric Cylinder Set Model for Estimating Dose from Gamma-Emitting Cloud

摘要

The concentric cylinder set (CCS) cloud gamma dose model has been developed to estimate external gamma doses from elevated radioactive clouds. The primary application of this model is for stack releases by small radiological research facilities, including release during changing meteorological conditions or over irregular terrain. The CCS model is applied with elementary calculation procedures, using only the tables and working curves included here. Calculation procedures are provided for dose estimates based on simple plumes and irregular clouds. Sample calculations are provided for evaluating doses from irregular clouds. The CCS model has been compared to both published models, where the latter could be applied, and field measurements have been made during stack releases of argon-41, with satisfactory results. CCS model dose estimates provide substantial information on environmental surveillance for a wide range of release conditions, with little expenditure of time or money. (Author)