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자료유형
학술저널
저자정보
저널정보
한국원자력학회 Nuclear Engineering and Technology Nuclear Engineering and Technology 제51권 제1호
발행연도
2019.1
수록면
257 - 262 (6page)

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The control of microstructure is critical for the porous fuel particles used for infiltrating actinide nuclides. This study concerns the effect of heating processes on properties and microstructure of the fuel particles. The uniform gel precursor beads were synthesized by a microfluidic sol-gel process and then the porousCeO2 microspheres, as a surrogate for the ceramic nuclear fuel particles, were obtained by heatingtreatment of the gel precursors. The fabricated CeO2 microspheres have a narrow size distribution andgood sphericity due to the feature of microfluidics. The effects of heating processes parameters, such asheating mode and peak temperatures on the properties of microspheres were studied in detail. Anoptimized heating mode and the peak temperature of 650 C were selected to produce porous CeO2microspheres. The optimized heating mode can avoid the appearance of broken or crack microspheres inthe heating process, and as-prepared porous microspheres were of suitable pore size distribution andpore volume for loading minor actinide (MA) solution by an infiltration method that is used for fabricationof MA-bearing nuclear fuel beads. After the infiltration process, 1000 C was selected as the finaltemperature to improve the compressive strength of microspheres.

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