摘要
采用磷酸镁水泥(Magnesium phosphate cement,MPC)对核素Sr2+、Cs+进行固化,对固化体中Sr2+、Cs+的浸出性能进行了研究,并根据Fick第二定律建立了适用于磷酸镁体系的Sr2+、Cs+迁移模型,对核素Sr2+、Cs+在磷酸镁水泥固化体中的迁移进行预测。结果表明,磷酸镁水泥可以有效固化Sr和Cs,使核素Sr2+、Cs+在磷酸镁水泥固化体中浸出率较低;建立的一维衰变浸出模型可以有效地预测核素Sr2+、Cs+在磷酸镁水泥固化体中的迁移规律。
Background： Magnesium phosphate cement （MPC） has a good application prospect in radioactive waste solidification for its good adsorption property of Sr and Cs which are the main elements in the middle and low level nuclear reactor waste. Purpose： This study aims to investigate the migration of radionuclides in MPC and build a transport model of Sr2＋, Cs＋ in MPC. Methods： According to Fick＇s second law, the migration model of Sr2＋, Cs＋ to predict the leaching behavior of Sr2＋, Cs＋ was established by studying the leach abilities of Sr2＋ and Cs＋ in MPC. Results： Sr and Cs can be effectively solidified by MPC, and the leaching rate of Sr2＋, Cs＋ is low. Compared with Sr2＋ Cs＋ has stronger migration ability in magnesium phosphate cement. Conclusion： The leaching behavior of Sr2＋, Cs＋ immobilized in MPC can be predicted well by one-dimension decay migration model. In addition, the migration behavior of Sr2＋ was predicted more accurately by the migration model.
出处
《核技术》
CAS
CSCD
北大核心
2016年第8期36-40,共5页
Nuclear Techniques
基金
国家自然科学基金(No.51272283)
重庆市自然科学基金(No.CSTC2012jj B50009)资助~~
