Development of High-Level Nuclear Waste Glasses using Phosphate Glass Anomaly

研究了MgO含量为45- 55mol%的镁磷酸盐玻璃在模拟高放废物中的浸出行为和结构。含有50摩尔% MgO和45质量%模拟HLW的玻璃废物形式的总浸出速率在90℃下为10 μ <-6>g/cm 2<2.>天的数量级，这与目前使用的硼硅酸盐玻璃废物形式的相应释放相比足够小。随着模拟HLW掺入量的增加，二聚体（P_2O_7）~（2+）<4->和单体（PO_4）<3->~（2+）等孤立离子增多。性能的变化可以归因于结构的变化，由于纳入模拟HLW。

Leaching behavior and structure of magnesium phosphate glasses containing 45-55 mol% MgO incorporated with simulated high-level nuclear waste(HLW) were studied. The gross leach rate of the glass waste form containing 50 mol% MgO and 45 mass% simulated HLW is of the order of 10^<-6> g/cm^<2.> day at 90℃, which is small enough as compared with the corresponding release from a currently used borosilicate glass waste form. The isolated ions such as dimeric(P_2O_7)^<4-> and monomeric(PO_4)^<3-> increase as increasing the incorporating amount of the simulated HLW. The changes in properties can be attributed to the structure changes owing to the incorporation of the simulated HLW.