Calculation of Lattice Thermal Conductivity of UO 2+0.25 by Solving Phonon Boltzmann Equation

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عنوان دوره: اولین دوره بین المللی و بیست و هشتمین دوره ملی (1400)
The lattice thermal conductivity of UO2 and UO 2+0.25 is investigated by the relaxation time approximation
solution of the Boltzmann transport equation for the steady-state phonon distribution function. To do this,
we have calculated the 2 nd and 3 rd IFCs with finite displacement method. Results show that thermal
conductivity of UO 2+0.25 is decreased by adding oxygen defects. The reason behind the decreasing the
thermal conductivity is the increasing of scattering rate by defects.
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