Evaluation of mechanical characteristic design models for vibration packing fuel

not registered; not registered; Onuki, Norihiko*; not registered

This study has been carried out as a link in the research and development of FBR vibration packing fuel that UO and MOX particles are compacted directly in the fuel cladding. In this research, the calculation program code for vibration packing fuel design has been developed to analyze of the fuel thermal/mechanical performances. In the characteristic of vibration packing fuel, FCMI (Fuel-Cladding Mechanical Interaction) of the fuel is soft compared with that of pellet fuel for the experimental knowledge. To the analysis of the fuel FCMI performance adequately, we have been investigated design material property equations of the fuel. The situation of particles in the fuel cladding at vibration packing to investigate of FCMI material property design equations are analyzed by use of PFC (Particle Flow Code in 3 Dimension) program code. The parameters of this analysis were fuel shapes (spherical and vipac), fuel sizes, vipac fuel shapes etc. The fuel performances at increasing of mechanical stresses and temperatures of fuel were analyzed to investigate of fuel thermal/mechanical performance under irradiation states. The fuels that partial sintered were analyzed to analysis of sintered fuels performance, too. Vibration packing fuel's material design property equations (Effect Young's modulus, Effect Poisson's ratio) were proposed based on the above mentioned analysis results.