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

研究了含45-55 mol% MgO的磷酸镁玻璃与模拟高放核废料（HLW）的浸出行为和结构。含50 mol% MgO和45质量%模拟高沸石的玻璃废渣的总浸出率为10^<-6> g/cm^<2。与目前使用的硼硅玻璃废料形式的相应释放量相比，这已经足够小了。二聚体（P_2O_7）^<4->和单体（PO_4）^<3->的分离离子随着模拟高沸石掺入量的增加而增加。性能的变化可归因于由于模拟高强度金属的加入而导致的结构变化。

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.