Program for calculation of radionuclide buildup and burnup in a nuclear reactor

The technique for calculating radionuclide buildup and burnup in nuclear reactors in the multigroup approximation taking into account the effects of cross section self-shielding in the resonance energy range is presented. The technique is realized in the CONUS program for the BESM-6 computer written in the ALGoL-GDR for the DUBNA monitoring system. The system of differential equations describing the process of radionuclide accumulation is solved by the Runge--- Kutta method. On each integration step recalculation of group cross sections with account for resonance self-shielding in intermediate resonance approximation is possible. The program contains a library of multigroup cross sections and resonance parameters of nuclides which is completed in the process of calculations. The initial data input is realized in a convenient for a user form, namely, formatlessly by the conventional names. A possibility of calculations with data input-output and result output on a terminal is envisaged. Calculational time of a variant in the two-group approximation for 28 nuclides for 300 days at flux density of 1014 neutr./cm2xs constitutes 4 min