Thermal properties of (Al,Gd)O3 doped uranium dioxide

10th International School-Conference on Materials for Extreme Environment: Development, Production and Application

Pokrovskiy, S.A.^1 ; Baranov, V.G.^1 ; Tenishev, A.V.^1

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, 31 Kashirskoe highway, Moscow

115409, Russia^1

关键词: Neutron absorbers;    Thermal characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/130/1/012026/pdf
DOI  :  10.1088/1757-899X/130/1/012026

来源: IOP

【 摘 要 】

In this paper were defined thermal characteristics (thermal diffusivity up to 2000 °C, heat capacity up to 1250 ° C and thermal conductivity of up to 1250 °C) of oxide nuclear fuel with additives of burnable neutron absorber in the form of (Al,Gd)O3. Also for comparison samples UO2with gadolinium Gd2O3and pure uranium dioxide were studied. It is shown that the thermal diffusivity and thermal conductivity of UO2with dopant of gadolinium in the form of (Al, Gd) O3is considerably higher than those of Gd2O3-doped uranium dioxide, due to the fact that (Al, Gd)O3does not form a solid solution with UO2.