A Microfluidic-Assisted Fabrication of Size-Controlled Porose CeO2 Microspheres as an Analog Production of Nuclear Fuel Beads
A Microfluidic-Assisted Fabrication of Size-Controlled Porose CeO2 Microspheres as an Analog Production of Nuclear Fuel Beads
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DOI：
10.4028/www.scientific.net/ast.94.55
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发表时间：
2014-10
期刊：
影响因子：
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通讯作者：
Xiang Li;Ya Ting Yang;Cao Fu;Q. Huang;Liu-si Sheng;Zhenqi Chang;C. Serra
中科院分区：
文献类型：
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作者：
Xiang Li;Ya Ting Yang;Cao Fu;Q. Huang;Liu-si Sheng;Zhenqi Chang;C. Serra
孔隙率控制的核燃料微球是通过渗透法制造含少量锕系元素的弥散型核燃料的重要材料。本文以铈作为钚的替代品，采用微流控技术结合溶胶凝胶工艺制备了尺寸范围为20μm至800μm的单分散、尺寸可控的球形氧化物核燃料颗粒。通过在补料肉汤中添加聚乙二醇 6000 作为致孔剂，成功制备了密度范围为 25% 至 93% T.D. 的多孔 CeO2 珠。在与制备CeO2珠粒相同的实验条件下也制备出了均匀的U3O8珠粒，这表明了该方法制备尺寸控制的单分散核燃料珠粒的可行性。
Porosity-controlled nuclear fuel microsphere is an essential material of fabricating minor actinide-bearing dispersion-type nuclear fuel with the infiltration processes. In this paper, monodisperse and size-controlled spherical oxide nuclear fuel particles with size range of 20μm to 800μm were fabricated by means of microfluidic technology combined with sol-gel process using cerium as a surrogate for plutonium. The porous CeO2 beads with the density range of 25% to 93% T.D. were successfully prepared by the addition of polyethylene glycol 6000 used as a porogen to the feed broth. The uniform U3O8 beads were also prepared at the same experimental conditions as CeO2 beads prepared, which shows the feasibility of the method for fabricating size-controlled monodisperse nuclear fuel beads.