摘要
本文推导出了高酸度(0.42—3mol/1)下,钍铀和硝酸在30％TBP-煤油体系中的分配数学模型。同时,利用该模型对钍基核燃料后处理中钍铀分离净化工艺流程进行了计算机模拟和参数优化。经优化得到了一个最佳流程,通过实验验证,实验值和计算值相近。
For the system Th(NO3)4-UO2(NO3)2-HNO3-H2O/30%TBP in kerosene,mathematical models of Th,U and HNO3 extraction equilibrium in 0. 42-3 mol/l HNO3 are developed using the experimental data. Using these models,an optimal solvent extraction process for reprocessing of Th-U fuel is obtained by computer programme for optimization of solvent extraction process. Cascade extraction experiments containing Th, U and fission products in laboratory scale are performed using the optimal conditions calculated. The calculated results are in good agreement with the experimental data. The recovery of uranium and thorium are >99. 9% ,and good decontamination (>103) of fission products from Th-U fuel are obtained.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
1992年第1期37-43,共7页
Journal of Nuclear and Radiochemistry
关键词
核燃料
数学模型
后处理
钍
铀
Th,U,Solvent extraction,Mathematical model,Optimization.
