This book gives the theoretical description and practical measurement of the neutron and gamma spatial distribution in the radial experimental channel at VR-1 research reactor. For providing these measurements two experimental techniques were explained and used: off-line and on-line methods. On-line measurement of neutron spatial distribution was performed with He-3 gas filled detector. From off-line measurements Neutron Activation Analysis (for neutron detection) and Thermoluminescent method (for gamma radiation detection) were chosen. Obtained results from the experiments were compared with...