Abstract

Experimental justification has been provided for the possibility of extractive isolation of technetium from raffinate of technical process of affinage of uranium–plutonium product resulting from hydrometallurgical reprocessing of spent nuclear fuel (SNF). Technetium (VII) from aqueous solution of Zr(IV) (10 g/L) and 4 mol/L HNO₃ with small content of ZrO^b+ and \({\text{Z}}{{{\text{r}}}_{{\text{2}}}}{\text{O}}_{{\text{3}}}^{{b + }}\) oxocations is recovered by 80% in 30% TBP in hydrocarbon diluent over seven stages of counter-current continuous cascade at ratio O : A = 1 : 1. Variation in phase flow ratio for cascade part leads to virtually complete Tc(VII) extraction in organic phase over ten stages. Technetium(VII) is selectively back extracted from loaded organic phase with water virtually completely over eleven stages of counter-current continuous cascade. Technological extraction scheme for technetium isolation from SNF solutions has been proposed.

中文翻译：

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废核燃料的萃取后处理从残液中回收Tech（VII）的实验模型

摘要

提供了实验依据，证明有可能从乏核燃料的湿法冶金后处理产生的铀-产品关联工艺过程的提余液中提取isolation。来自Zr（IV）（10 g / L）和4 mol / L HNO _3的水溶液中的（VII），ZrO ^{b +}和\（{\ text {Z}} {{{\ text {r} }} _ {{\ text {2}}}} {\ text {O}} _ {{\ text {3}}} ^ {{b +}} \）在七个阶段的逆流连续级联中，以O：A = 1：1的比例，在烃稀释剂中的30％TBP中以80％的比例回收了羰基合成。有机相分十个阶段。在逆流连续级联的11个阶段中，几乎完全从负载的有机相中选择性地从水中反萃取了（（VII）。提出了从SNF解决方案中分离tech的技术提取方案。