The possibility of an essential increase of the rate of nuclear reactions with deuterium in solids being solid electrolytes with cation-electronic conductivity is shown. Monocrystals of oxide tungsten bronzes, on the surface of which are structures which provide the direction of the movement in the crystals of the deuterium ions created by anodic treatment, were used as such electrolytes. It is found that strictly maintaining the experimental parameters leads to completely qualitatively reproducible results: generation of neutrons and heat when deuterium is introduced into the system.