[en] The method is based on the assumption that local values of thermal neutron flow in different points along the IGR central experimental channel (CEC) volume are determined not only with the reactor and the reactor systems condition, but with the influence of the experimental devices installed in the central experimental channel. In 142F and 143F experiments this assumption was checked experimentally. In the experiments experimental device transfer along the CEC with the simultaneous measuring neutron flux density in the water tank of the reactor and in CEC. In this work there is an option of the method developed for the case of experimental object transfer along the CEC vertical axis with the supposition that in the course of the transfer the mass and geometric parameters of the experimental devices do not change