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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Molecular dynamics study of the mixed oxide fuel thermal conductivity
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Molecular dynamics study of the mixed oxide fuel thermal conductivity

机译:混合氧化物燃料导热系数的分子动力学研究

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摘要

There is still no clear understanding of the plutonium content influence on the thermal conductivity behaviour of the (U,Pu) O_2 MOX fuels. In this work Classical Molecular Dynamics (MD) was used to investigate the (U,Pu) O_2 thermal conductivity in the whole concentration range and in the temperature range from 400 K to 1600 K. The Green-Kubo approach was used for the thermal conductivity calculation and an algorithm was proposed to improve the accuracy of the calculation. The obtained results are in good agreement with the literature experimental data and results of modelling of other authors. On the basis of the obtained results we give recommendations for the MOX thermal conductivity evaluation in the concentration range from pure UO_2 up to pure PuO_2.
机译:the含量对(U,Pu)O_2 MOX燃料的热导行为的影响仍然没有明确的了解。在这项工作中,经典分子动力学(MD)用于研究在整个浓度范围内以及在400 K至1600 K的温度范围内的(U,Pu)O_2热导率。采用Green-Kubo方法进行热导率研究提出了一种提高计算精度的算法。获得的结果与文献实验数据和其他作者的建模结果非常吻合。根据获得的结果,我们为从纯UO_2到纯PuO_2的浓度范围内的MOX热导率评估提供了建议。

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