Effects of irradiation behavior on physicochemical properties of glassy radioactive contaminated soil containing various contents of actinides nuclear waste

The evaluation of radiation resistance of the treated radioactive contaminated soil is crucial. The irradiation behavior of simulated radioactive soil waste irradiated with 1.5 MeV Xe 20+ ions at fluences of 1 × 10 12 -1 × 10 15 ions/cm 2 was studied. Before the irradiation experiment, all the samples were sintered by microwave. The results showed that microwave sintering may be used to treat radioactive contaminated soil. In addition, the irradiation experiment results show that when the Nd 2 O 3 content was low (<20  wt. %), the irradiation has little effect on the sample. When the Nd 2 O 3 content was higher, the Vickers hardness of the sample (25  wt. %) decreased by 7 % at a fluence of 1 × 10 15 ions/cm 2 , which may be due to the high Nd 2 O 3 content that destroyed the overall stability of the glass waste form. The low normalized leaching rate of the irradiated sample (LR Nd , ∼10 -6  g·m -2 ·d -1 ) also proved that it had good aqueous durability. Moreover, the radiation resistance of the sample was illustrated by studying the influence mechanism of 1.5 MeV Xe 20+ irradiation on radioactive contaminated soil. This work can help to study the environmental pollution problems of radioactive contaminated soil containing various contents of actinide nuclear waste .