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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Thermodynamic analysis of chemical states of fission products in uranium-zirconium hydride fuel
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Thermodynamic analysis of chemical states of fission products in uranium-zirconium hydride fuel

机译：铀-锆氢化物燃料中裂变产物化学状态的热力学分析

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The chemical state of fission products (FPs) in U + ZrH1.60 fuel was studied from the thermodynamic point of view. Twenty most abundant FP elements were taken into account in the system of U-Zr-H-O-FP in which oxygen is treated as an impurity. The Thermo-Gale computer code was used to calculate the equilibrium state of the multi-phase and multi-component system. This calculation shows that yttrium, the alkaline earth metals (Ba, Sr) and most of the lanthanides prefer to form corresponding binary hydrides. Oxygen impurities in the system are likely to form a mixture of Y2O3, Pr-2 O-3. Sm2O3 as well as Ce2O3 depending on their fission yields. With increasing of burn-up, only a slight decrease of the hydrogen potential in the fuel pin can be expected because of the very little consumption of hydrogen in the hydrogenation process of the FP. In the gas phase, H-2, Cs, Rb, CsRb as well as CsI are the main vapor species apart from the noble gases Xe and Kr. Solid swelling of the fuel due to formation of condensed phases was calculated as a function of burn-up. (C) 2001 Elsevier Science B.V. All rights reserved. [References: 28]
机译：从热力学角度研究了U + ZrH1.60燃料中裂变产物（FPs）的化学状态。在将氧气视为杂质的U-Zr-H-O-FP系统中，考虑了二十种最丰富的FP元素。 Thermo-Gale计算机代码用于计算多相和多组分系统的平衡状态。该计算表明，钇，碱土金属（Ba，Sr）和大多数镧系元素倾向于形成相应的二元氢化物。系统中的氧气杂质很可能形成Y2O3，Pr-2 O-3的混合物。 Sm2O3和Ce2O3取决于它们的裂变产率。随着燃尽的增加，由于FP的氢化过程中氢气的消耗非常少，因此只能预期燃料销中的氢气电势略有下降。在气相中，除了稀有气体Xe和Kr之外，H-2，Cs，Rb，CsRb和CsI是主要的蒸气物质。计算出由于形成冷凝相而引起的燃料的固体溶胀，作为燃耗的函数。 （C）2001 Elsevier Science B.V.保留所有权利。 [参考：28]

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