化工矿物与加工2023，Vol.52Issue(12)：37-43,7.DOI:10.16283/j.cnki.hgkwyjg.2023.12.006
岩洞处置环境下混合树脂水泥固化体中五类关键核素的长期浸出行为研究
Study on long-term leaching behavior of five key simulated nuclides in mixed resin cement waste form in cave disposal environment
摘要
Abstract
Based on the composition of radioactive waste resin cement solidified body of a nuclear power plant in China,mixed resin cement solidified body containing Sr,Cs,Ni,Co,I five kinds of key simulated nuclides was pre-pared.The long-term leaching behavior of five kinds of key nuclides in cement solidified body was studied.The results showed that the average pH value of leaching solution was 11.54 during the leaching period of 24 hours to 192 days,the nuclides always participated in leaching in alkaline environment,the conductivity showed a trend of oscillation and increasing,and the components in solidified body continued to dissolve out.The leaching rate and cumulative leaching fraction of the five types of nuclides meet the relevant requirements of GB 14569.1-2011"Performance Requirements for Low and Medium Level Radioactive Waste Solidification Bodies-Cement Solidification Bodies";The leaching rate of I is the lowest,which is three orders of magnitude lower than the standard value;The one-dimensional decay leaching model can effectively predict the leaching behavior of nuclides Co,Cs,and Ni;The leaching of Sr is jointly controlled by a one-dimensional leaching model and a linear leaching model,and after 72 days,it shows an accelerated leaching trend.关键词
岩洞处置/水泥固化/关键核素/浸出行为/表观扩散系数/浸出率/一维浸出模型/线性浸出模型Key words
cave disposal/cement solidification/key nuclides/leaching behavior/apparent diffusion coefficient/leaching rate/one dimensional leaching model/linear leaching model分类
能源科技引用本文复制引用
丁芸,任馨玥,谢文章,王烈林,杜颖哲,林鹏,李坤峰,尹雯,兰蕊,谢华..岩洞处置环境下混合树脂水泥固化体中五类关键核素的长期浸出行为研究[J].化工矿物与加工,2023,52(12):37-43,7.基金项目
中广核研究院横向项目(21zh026302). （21zh026302）
