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DIAMEX Solvent Behavior under Continuous Degradation and Regeneration Operations

机译：连续降解和再生操作下的DIAMEX溶剂行为

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摘要

Industrial implementation of partitioning processes based on solvent extraction requires solvent recycling with constant separation and physicochemical properties. In nuclear applications, both radiolysis and acidic hydrolysis lead to degradation products which need to be removed from solvent before its recycling. The long term evolution of DIAMEX process solvent (0.65M DMDOHEMA-HTP) under continuous degradation by acidic hydrolysis and y-radiolysis was studied in the laboratory-scale MARCEL y-irradiation facility, with and without alkaline treatment process (AT). With AT, analyses of organic phase showed the accumulation of only one degradation product, MDOHEMA, probably responsible for the molybdenum accumulation observed. Distribution coefficients of Zr, Pd, Fe and Nd, surface tension, refraction index, settling time, viscosity, and density were constant during the tests. Furthermore, no catalytic effect of fission and corrosion products was observed. These studies were consolidated by comparative α- and γ-radiolysis batch tests which showed that a-radiolysis and y-radiolysis led to the same degradation products.
机译：基于溶剂萃取的分配工艺的工业实施需要具有恒定分离和理化特性的溶剂循环利用。在核应用中，辐射分解和酸性水解都会导致降解产物，需要在回收溶剂之前将其从溶剂中除去。在实验室规模的MARCELγ辐照设备中，使用和不使用碱处理工艺（AT），研究了DIAMEX工艺溶剂（0.65M DMDOHEMA-HTP）在通过酸性水解和y辐射分解连续降解下的长期演变。使用AT进行的有机相分析表明，只有一种降解产物MDOHEMA积累，这可能与观察到的钼积累有关。在测试过程中，Zr，Pd，Fe和Nd的分布系数，表面张力，折射率，沉降时间，粘度和密度是恒定的。此外，未观察到裂变和腐蚀产物的催化作用。这些研究通过比较性的α和γ射线分解批量试验得到了巩固，这些试验表明，a射线分解和y射线分解会产生相同的降解产物。

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  • 来源
    《Nuclear energy and the environment》|2009年|p.255-269|共15页
  • 会议地点 Washington DC(US);Washington DC(US)
  • 作者

    B. Cames; I. Bisel; P. Baron; C. Hill; D. Rudloff; B. Saucerotte;

  • 作者单位

    CEA, Nuclear Energy Division, Radiochemistry Processes Department, SCPS, LPCP, F-30207 Bagnols sur Ceze, France;

    CEA, Nuclear Energy Division, Radiochemistry Processes Department, SCPS, LPCP, F-30207 Bagnols sur Ceze, France;

    CEA, Nuclear Energy Division, Radiochemistry Processes Department, SCPS, LPCP, F-30207 Bagnols sur Ceze, France;

    CEA, Nuclear Energy Division, Radiochemistry Processes Department, SCPS, LPCP, F-30207 Bagnols sur Ceze, France;

    CEA, Nuclear Energy Division, Radiochemistry Processes Department, SCPS, LPCP, F-30207 Bagnols sur Ceze, France;

    CEA, Nuclear Energy Division, Radiochemistry Processes Department, SCPS, LPCP, F-30207 Bagnols sur Ceze, France;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 核能工业;
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