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The system of metrological measurements using spectrometers of human radiation (SHR) envisages the development, investigation and attestation of sources of volumetric activity simulating an object of investigation. The authors devised a unified solid-body phantom, representing a set of standard volumetric sources in the form of rectangular modules and a method of their distribution. When assembled, the phantom imitates the human body containing a radionuclide, regularly distributed by the volume. Different variants of the packing of the constituent elements makes in possible to simulate the human body in a wide range of age groups and height and weight correlations. Experimental investigations on the standardization of various types of SHR on the basis of this phantom have shown good convergence of the results of measurements within the limits of 15% error.