Calculation of thermal conductivity of UO2±0.25 solving phonon Boltzmann equation

Q4 Physics and Astronomy
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引用次数: 0

Abstract

In this study, the effect of point defects on the thermal conductivity of UO2 is investigated. Especially, the effects of oxygen vacancy and interstitial are considered. Thermal conductivity of UO2, UO2+0.25 and UO2-0.25 is calculated by solving the phonon Boltzmann equation (BTE) under the relaxation time approximation (RTA). The results show that introducing any defects to the lattice structure of UO2 decreases thermal conductivity significantly. In addition, the results show that the variation of the thermal conductivity of UO2-0.25 is much lower than that of UO2+0.25 in the temperature interval of 300 to 1000 Kelvin.
UO2±0.25解声子玻尔兹曼方程的导热系数计算
本文研究了点缺陷对UO2热导率的影响。特别考虑了氧空位和间隙的影响。利用弛豫时间近似(RTA)求解声子玻尔兹曼方程(BTE),计算了UO2、UO2+0.25和UO2-0.25的导热系数。结果表明,在UO2的晶格结构中引入任何缺陷都会显著降低其导热系数。此外,结果表明,在300 ~ 1000开尔文的温度区间内,UO2-0.25的导热系数变化远小于UO2+0.25。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Iranian Journal of Physics Research
Iranian Journal of Physics Research Physics and Astronomy-Physics and Astronomy (all)
CiteScore
0.20
自引率
0.00%
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0
审稿时长
30 weeks
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