Abstract Since the working environment of the pressurized water reactor (PWR) fuel element is complex, the analysis and optimization of its performance involve many physical phenomena, such as thermic, mechanics and so on. In order to analyze and optimize the performance of PWR fuel element, the column fuel element (CFE), singular-cooled annular fuel element (SCAFE) and dual-cooled annular fuel element (DCAFE) are simulated based on the finite element analysis software called ABAQUS. For the DCAFE, the inner diameter is modified, and the concept of “normalized volume parameter” is proposed to eliminate the influence of volume change on the performance of the fuel element, and to accurately describe the thermodynamic performance of the fuel element under different inner and outer diameters. The results show that: The DCAFE has advantages of low von Mises stress, small radial displacement and low temperature. When the ratio of inner and outer diameters is about 0.67, thermodynamic properties are the best and the optimal size is achieved.

中文翻译：

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压水燃料组件中燃料棒的仿真与优化设计

摘要 由于压水堆燃料元件的工作环境复杂，其性能的分析和优化涉及许多物理现象，如热、力学等。为了分析和优化压水堆燃料元件的性能，基于有限元分析软件对柱状燃料元件（CFE）、单冷却环形燃料元件（SCAFE）和双冷却环形燃料元件（DCAFE）进行了模拟。 ABAQUS。对于DCAFE，修改了内径，提出了“归一化体积参数”的概念，以消除体积变化对燃料元件性能的影响，准确描述燃料元件在不同内径下的热力学性能。和外径。结果表明：DCAFE具有von Mises应力低、径向位移小、温度低等优点。当内外径比约为0.67时，热力学性能最好，达到最佳尺寸。