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Onuki, Norihiko*; *
JNC TJ9400 2003-006, 206 Pages, 2003/02
JNC-TJ9400-2003-006.pdf:6.67MB
In this study,for the feasibility studies on commercialized FBR cycle system, we researched the vibration packing fuel fabrication system and main fuel fabrication equipments for wet fuel recycle plant. The fuel fabrication system has fuel pin fabrication process, fuel pin inspection process, fuel assembly fabrication process and fuel assembly inspection process. Main equipments of fuel fabrication sysutem are pin magazine rack to hold the fuel pins at vibration packing, vibration packing equipment, spacer insertion equipment, upper end plug welding equipment, fuel density measurement equipment, fuel assembly fabrication equipment and fuel assembly inspection equipment. We investigated the basic designs, operation procedures, material handlings, operating flow charts,maintenances and failure rate of those equipments. Furthermore, criticality, fire/explosion and earthquake-proof were investigated as safety analysis, and the manners of quality controls and material accountancy of the fuels were investigated. Economical evaluation and generated wastes evaluation were carried out for the above fuel fabrication systems, too.
*; Onuki, Norihiko*; *; *
JNC TJ8410 2002-001, 114 Pages, 2002/02
JNC-TJ8410-2002-001.pdf:3.03MB
This study has been carried out as a link in the research and development of FBR vibro-packed fuel that fuel particles are compacted directly in the fuel cladding. The calculation program code for vibro-packed fuel design has been developed to analyze of the fuel thermal/mechanical performances. In last year, we investigated material design property equations for vibro-packed fuel by the distinct element method (PFC program code). In this year, considering the vibro-packed fuel pin has variable fuel particle packing conditions, we researched fuel mechanical properties using variable particle packing density and particle size distributions. Mechanical property analyses were carried out at the condition of load cycle and simulated fuel pin conditions, too. In the analysis, the particle packing density was set up approximately 50%
70%, and particle size distribution was set up 0
m200m. The hysteresis loop of stress - strain was investigated in the analysis of load cycle, and simulated fuel pin with center hole was investigated, too. Vibro-packed fuel's material design property equations (Effect Young's modulus, Effect Poisson's ratio) were proposed based on the above mentioned analysis results.
*; *; Onuki, Norihiko*; *
JNC TJ8410 2001-001, 112 Pages, 2001/02
JNC-TJ8410-2001-001.pdf:6.71MB
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.
; ; Onuki, Norihiko;
Proceedings of International Topical Meeting on Light Water Reactor Fuel Performance, ,
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