A program sponsored by the Nuclear Regulatory Commission (NRC) and designed to estimate the potential consequences of adversary actions in the nuclear power fuel cycle has been completed. So that the results of this consequence analysis would be comparable to that of the reactor Safety Study (RSS), the methodology described in the RSS and implemented in the Calculation of Reactor Accident Consequences (CRAC) code served as the baseline for consequence evaluation in this study. Four portions of the RSS methodology were modified for use in this study: the atmospheric dispersion model, the inhalation dose factors, the criterion for early mortality from lung dose, and the model for chronic pathways to man. Implementation of these modifications to the CRAC code resulted in the preparation and application of a revised code termed NUCRAC. These modifications are described in detail. Detailed instructions for the operation of NUCRAC are presented in the form of a user-manual. Inputs and outputs for an example calculation are also presented.
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