252Cf is widely used in reactor startup and neutron activation analysis,and it is of great significance to carry out research on irradiation production technology.Production of 252Cf is not easy because of its huge nucleon number and long nuclide transmutation chain.Based on the lead-cooled fast neutron super high flux research reactor,this paper focuses on the key technologies of its irradiation production.According to the difficulty of 252Cf production,a precise nuclide databank and longtime bumup calculating procedure of nuclide production targets are established,and the key factors such as target structure and material design,neutron energy spectrum and neutron flux density are studied.The irradiation calculation of 252Cf target shows that although 252Cf has a low transmutation productivity,it can be improved with appropriate designs of 252Cf target,neutron energy spectrum and neutron flux density,thus improving the production efficiency of 252Cf.A method of optimizing neutron local energy spectrum through resonance shielding is proposed to reduce fission consumption of nuclides,thus improving the production efficiency of 252Cf.This paper expounds the production mechanism of 252Cf and the influence law of key factors,and gives the demonstration direction of 252Cf irradiation production technology design.
Nuclide productionSuper high flux reactor252CfResonance shielding
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