Measurement of High Energy Neutron Ratio in the Nuclear Reactor

In this work, adsorption behaviors of uranium, neptunium and fission products on the anion resin and TBP levextrel resin were investigated. A procedure was established to remove micro neptunium from milligramme uranium. The chemical recovery of U is about 90%. The decontamination factors of Np, Ce, Ba, La are more than 1×10⁴, those of Nd, Ru are 1×10³ and those of Zr and Nb are about 1×10². The flux of high energy neutron in the miniature and pulse nuclear reactor were measured by using the reaction of ²³⁸U(n, 2n)²³⁷U. The flux of thermal neutron in the miniature and pulse nuclear reactor were measured by using the reaction of ²³⁸U(n,γ)²³⁹U. Finally, the ratios of high energy neutron in the miniature and pulse nuclear reactor were obtained.