QAD is the generic designation for a series of point-kernel computer programs designed for estimating the effects of gamma rays and neutrons that originate in a volume-distrib¬uted source. Gamma ray dose rates, energy depositions, uncollided fluxes, and associated quantities;as well as inter¬polated moments-method neutron fluxes, energy depositions, and dose rates, may be calculated. Surfaces, defined by quadratic equations, are used for a three-dimensional descrip¬tion of the physical situation. Speed, flexibility, and ease of use, as well as the ability to mock-up any direct-beam radiation problem, contribute to the utility of the program.
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