For computer simulation of a radionuclide decay the decay scheme data are included in one vector and four matrices. These contain information about the energy levels the transitions enter, the transition energies and intensities, and the internal conversion fractions. The decays of fifteen usual radionuclides were simulated by the presented procedure and they are catalogued as a FORTRAN subprogram. The characteristics quantities of these radionuclide decays obtained using this subprogram data are tabulated.