Computer program ''System variability''

The program is described which is aimed at determining and analyzing all technologically permissible configurations of the system for treating radioactive wastes from nuclear power plants. The program is based on a range of so-called unit operations which are represented, e.g., by the evaporator, bituminization, cementation, etc. Each unit operation is characterized by the number of inputs and outputs described by vectors whose dimension is fixed and may be up to 50, by conditions of applicability and by transform rules. The configuration is conceived as a system of unit operations together with a description of their interconnection. The current version of the program written in Fortran IV only produces non-cyclic configurations but a version is being prepared which will include the recycling of certain intermediate products. (Z.M.)