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介绍了添加微量元素制备大晶粒UO2芯块的研究情况。添加的三种微量元素是:普通级Al2O3／SiO2、纳米级Al2O3／SiO2和Cr2O3。得出了阶段性的结论:添加这三种微量元素均促进UO2芯块晶粒的增加。控制适当的添加量,其性能完全满足现有的技术条件。
The research situation of preparing large grain UO2 pellets by adding trace elements is introduced. The three trace elements added are: normal grade Al2O3 / SiO2, nano-scale Al2O3 / SiO2 and Cr2O3. Reached a phased conclusion: The addition of these three trace elements all promote the increase of UO2 pellets. Control the appropriate amount added, its performance fully meet the existing technical conditions.