Reference tables are provided that make it possible to quickly, with the necessary accuracy and minimal probability of making an error, recalculate the numerical values ​ ​ of activity, exposure, absorbed and equivalent doses, radiation dose rate, gamma-constant radionuclide and other radiation values ​ ​ used in radiation safety, radiobiology, radiation medicine and other related scientific disciplines expressed in off-system units. For NPP engineers engaged in dosimetric research.