锝在Purex流程共去污段(1A槽)的走向

Trend of Tc in 1A Extractor of Purex Process

摘要: 研究了在不同铀锆锝比条件下, 硝酸浓度对Tc(Ⅶ )在 30 %TBP OK中分配系数的影响, 锝在 1A槽中的萃取行为及走向。实验结果表明 :1A槽中 1AF为 2mol/L和 3mol/LHNO3介质时, 锝进入 1AP的比例分别为 14 4 %和 2 7 0 %。当 1AF料液经加热预处理后, 以 3mol/LHNO3进料时, 99 8%的锝进入了 1AP。

Abstract: The effect of HNO 3 concentration on distribution ratio of Tc between 30 % TBP Kerosene and HNO 3 solution at various ratio of U, Zr, Tc is studied. The extraction behavior and trend of Tc in 1A extractor are obtained with mixer settler. Results show that 14.4 % and 27.0 % of Tc is in 1AP while concentration of HNO 3 in 1AF solution are 2 mol/L and 3 mol/L, respectively. However after heating pretreatment of 1AF solution, 99.8 % of Tc is in 1AP while concentration of HNO 3 in 1AF is 3 mol/L.