Neutron radiography facility using 252Cf neutron source

The paper presents the layout and description of the transportable neutron radiography facility using 252Cf neutron source as well as the results of the optimization studies of the radiation head parameters. The effects of the moderator sizes and neutron energy spectra for a number of the radionuclide neutron sources on the spatial distribution of slow neutrons in the moderator are discussed. The experiments were carried out using sources of such types as 252Cf, 238PuBe, 238PuB, 238PuLiF. In addition, the form of the 252Cf neutron source that allows one to attain the maximum slow neutron flux in the neutron beam obtained from the radiation head is discussed. (Auth.)