Abstract

The results of radiochemical analysis of 12 samples prepared from the fuel elements (fuel rods) of the upper and lower bundles of an irradiated fuel assembly (SFA) spent to an average fuel burnup of 35.7 MW day/kg U in the RBMK-1000 reactor are reported. The procedures for the radiochemical isolation and analysis of nuclides U, Pu, Am, Cm, Nd, Er, Cs using a complex of radiochemical and instrumental techniques using ion exchange, extraction chromatography, alpha, gamma, and mass spectrometry are described. The nuclide composition, mass content of the indicated nuclides and the value of fuel burnup were determined (by the method of heavy atoms and by accumulation of burnup monitors ^{145 + 146}Nd, ¹⁴⁸Nd).

中文翻译：

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RBMK-1000反应堆乏核燃料的放射化学分析

摘要

从辐照燃料组件（SFA）上束和下束的燃料元件（燃料棒）制备的12个样品的放射化学分析结果，在RBMK-1000反应堆中平均消耗35.7 MW天/ kg U的燃料被报道。描述了使用放射化学和仪器技术（使用离子交换，萃取色谱，α，γ和质谱）的复杂方法对核素U，Pu，Am，Cm，Nd，Er，Cs进行放射化学分离和分析的步骤。确定了核素组成，指示核素的质量含量和燃料燃耗值（通过重原子方法和燃耗监测器^{145 + 146} Nd，¹⁴⁸ Nd的累积）。