放射性废树脂热态超级压缩堆积密度探讨

Discussion on Packing Density of Radioactive Spent Resins after Hot Super-Compaction

采用热态超级压缩处理放射性废树脂是实现放射性废树脂减容处理的有效方法之一。粉末堆积理论分析表明,当树脂粉末包含多种粒度,且相邻颗粒粒径、质量分数按特定比例时,可获得最大的堆积密度。非放树脂热态超压试验结果显示,当研磨、烘干后的树脂粉末用20000kN压力压缩后,其相对堆积密度73.3%,密度1.1g/cm^3,远小于多元堆积密度理论值。建议改进研磨工艺,控制研磨后树脂粉末粒度分布,提高堆积密度,减少废物体积。

The treatment of radioactive spent resins by hot super-compaction is one of the effective methods to reduce the volume of radioactive spent resins.Analyzing the packing density of resin powder by powder packing theory,it is found that the maximum packing density can be realized when the resin powder contains a variety of particle sizes and the particle size and mass fraction of adjacent particles are in a specific proportion.The results of hot super-compaction test of non-radioactive resins show that when the grinded and dried resin powder is compacted by pressure 20 000 kN,its relative packing density is 73.3%and its density is 1.1 g/cm^3,which is less than the theoretical value of multiple packing density.By improving the grinding process and controlling the particle size distribution of resin powder after grinding,can be increase the relative packing density of resin powder and reduce the volume of wastes.