Abstract

A four-dimensional (4D, in concentration–temperature coordinates) computer model of the isobaric phase diagram of uranium, sodium, magnesium, and plutonium chlorides, as well as four three-dimensional (3D) computer models of the phase diagrams of the ternary systems forming it, has been constructed. The technology of assembling a 4D model of 46 hypersurfaces and 17 phase regions was used in the design. The obtained 4D model of the UCl₃–NaCl–MgCl₂–PuCl₃ phase diagram makes it possible to visualize a four-dimensional object as a whole (with all its hypersurfaces and phase regions) by any arbitrarily given 2D and 3D sections, as well as it is able to reproduce published (experimental or thermodynamically calculated) 2D sections. The scope of application of the results of the work is the development of materials for fuel components of fourth-generation molten salt reactors and pyrochemical recycling of spent fuel rods. For the first time, a comprehensive, complete description of phase diagrams composed of uranium, plutonium, sodium, and magnesium chlorides has been obtained.

中文翻译：

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UCl3–NaCl–MgCl2–PuCl3 同量异位相图的空间计算机模型

 抽象的

铀、钠、镁和钚氯化物同量异位相图的四维（4D，浓度-温度坐标）计算机模型，以及三元相图的四个三维 (3D) 计算机模型形成它的系统已经被构建。设计中采用了46个超曲面、17个相域的4D模型组装技术。获得的 UCl ₃ –NaCl–MgCl ₂ –PuCl ₃ 相图的 4D 模型使得可以将四维物体作为一个整体进行可视化（及其所有超曲面和相域）由任意给定的 2D 和 3D 截面组成，并且能够重现已发布的（实验或热力学计算的）2D 截面。工作成果的应用范围是第四代熔盐堆燃料组件材料的开发和乏燃料棒的热化学回收。首次获得了由铀、钚、钠和镁的氯化物组成的相图的全面、完整的描述。