Tan Pan, Luo Fen, Wei Guilin, Huang Lijing, Liu Du, Li Xiaoan, Lu Xirui
State Key Laboratory of Environmental-friendly Energy Materials, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China.
Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, PR China.
Appl Radiat Isot. 2023 Oct;200:110960. doi: 10.1016/j.apradiso.2023.110960. Epub 2023 Jul 24.
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 ions at fluences of 1 × 10-1 × 10 ions/cm 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 NdO content was low (<20 wt.%), the irradiation has little effect on the sample. When the NdO content was higher, the Vickers hardness of the sample (25 wt.%) decreased by 7 % at a fluence of 1 × 10 ions/cm, which may be due to the high NdO content that destroyed the overall stability of the glass waste form. The low normalized leaching rate of the irradiated sample (LR, ∼10 g·m·d) 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 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.
评估经处理的放射性污染土壤的抗辐射性至关重要。研究了在1×10 - 1×10离子/cm注量下用1.5 MeV氙离子辐照模拟放射性土壤废物的辐照行为。在辐照实验之前，所有样品均通过微波烧结。结果表明，微波烧结可用于处理放射性污染土壤。此外，辐照实验结果表明，当NdO含量较低（<20 wt.%）时，辐照对样品影响较小。当NdO含量较高时，在1×10离子/cm注量下，样品（25 wt.%）的维氏硬度下降了7%，这可能是由于高NdO含量破坏了玻璃废物形式的整体稳定性。辐照样品的低归一化浸出率（LR，~10 g·m·d）也证明其具有良好的耐水性。此外，通过研究1.5 MeV氙辐照对放射性污染土壤的影响机制来说明样品的抗辐射性。这项工作有助于研究含有各种含量锕系核废料的放射性污染土壤的环境污染问题。
