A Study of the Effects of a Radiation Dispersal Device

The effects of radiation from the detonation of a radiation dispersal device were examined through the coupling of computer code systems. The HPAC code system modeled the dispersal of radioactive particles from the detonation and output the data over a grid. The ORIGEN2 code calculated the photon spectrum per unit of material which when coupled with the HPAC data yielded the photon source spectra per unit area per second. The source spectra were reformulated as a volumetric source for the TORT code, which was used to calculate free-field fluences over a large region. The DRC3B code coupled those fluences with MASH-MORSE adjoint leakages from an armored vehicle to determine fluences, dose rates, and protection factors at selected positions within the vehicle as a function of location and orientation with respect to the detonation point. Indications are that meaningful results can be obtained within a reasonable amount of time using an advanced computer system.