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AbstractAbstract
[en] Variation of the microstructure and pore size distribution in UO2 and UO2-5wt%CeO2 sintered at oxidizing atmosphere and then resintered in reducing atmosphere was observed. The densities of UO2 and UO2-5wt%CeO2 sintered at CO2/H2 atmosphere(two stage) was decreased to 1.8%T.D. and 3.5%T.D., respectively, and those of the pellets sintered at H2/CO2/H2(three stage) was increased to 1.4%T. D. and 1.6%T. D. after resintering, respectively. The grain size of the pellets sintered with three stage was larger than that of the pellets sintered with two stage, and that of these two types of pellet was not increased after resintering. But, the grain size of UO2-5wt%CeO2 pellet sintered at reducing atmosphere was increased to about 2 times after resintering. The large density drop by resintering is due to a formation of microcracks longer than 10μm, related to trapped CO2 sintering
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Korean Nuclear Society, Taejon (Korea, Republic of); [CD-ROM]; Oct 2000; [8 p.]; 2000 autumn meeting of the KNS; Taejon (Korea, Republic of); 26-27 Oct 2000; Available from KNS, Taejon (KR); 6 refs, 6 figs
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Miscellaneous
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Conference
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