Partitioning of the High Level Radioactive Waste from the Purex Process by 40% TBF in Isoparaffin Using Magnesium Nitrate as a Salting-out Agent

IF 0.9 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Radiochemistry Pub Date : 2024-04-23 DOI:10.1134/S1066362224010065

M. V. Mamchich, A. A. Naumov, N. D. Goletskii, E. A. Puzikov, A. N. Viznyi>, A. V. Bizin, A. I. Medvedeva

引用次数: 0

Abstract

Centrifugal contactor rig trials of the partitioning flowsheet were carried out using simulated and real high level waste solutions obtained by reprocessing of WWER-100 spent nuclear fuel with burn-up of 47 MW day/t. 40% TBP in Isopar M was used as a solvent with magnesium nitrate as a salting-out agent. Complete removal of Cs, Sr, Zr, and Mo to raffinate was achieved. Rare earth elements, Am and Cm were totally concentrated in TPE and REE product. Comparison of the results of this work and previous trials with iron(III) nitrate as a salting-out agent [1] demonstrated that the use of magnesium nitrate instead of iron(III) nitrate resulted in higher decontamination factors of TPE and REE fraction from Cs (about 10 000) while in the case of iron(III) nitrate they are >7500.

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使用硝酸镁作为脱盐剂，在异链烷烃中以 40% TBF 分离来自 Purex 工艺的高放射性废物

摘要利用对 WWER-100 型乏核燃料（烧失量为 47 兆瓦/天/吨）进行后处理所获得的模拟和实际高浓度废液，对分馏流程图进行了离心接触器钻机试验。使用 Isopar M 中的 40% TBP 作为溶剂，硝酸镁作为除盐剂。铯、锶、锆和钼被完全去除。稀土元素 Am 和 Cm 完全浓缩在 TPE 和 REE 产品中。将这项工作的结果与之前使用硝酸铁（III）作为除盐剂的试验结果[1]进行比较后发现，使用硝酸镁而不是硝酸铁（III）可提高 TPE 和稀土元素馏分的除铯系数（约 10 000），而使用硝酸铁（III）的除铯系数为 7500。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiochemistry CHEMISTRY, INORGANIC & NUCLEAR-

CiteScore

1.30

自引率

33.30%

发文量

期刊介绍： Radiochemistry is a journal that covers the theoretical and applied aspects of radiochemistry, including basic nuclear physical properties of radionuclides; chemistry of radioactive elements and their compounds; the occurrence and behavior of natural and artificial radionuclides in the environment; nuclear fuel cycle; radiochemical analysis methods and devices; production and isolation of radionuclides, synthesis of labeled compounds, new applications of radioactive tracers; radiochemical aspects of nuclear medicine; radiation chemistry and after-effects of nuclear transformations.