Modeling of heat transfer in a fuel pellet based on uranium dioxide and ceramics (beryllium oxide)

U.K. Zhapbasbayev, Professor, Head of the Research and Production Laboratory ", A.D. Kudaibergen, Modeling in Energetics", , Satbayev University, Almaty, Kazakhstan. Email: uzak.zh@mail.ru, orcid id: https://orcid.org/ 0000-0001-5973-5149, Researcher of the Research and Production Laboratory "Modeling in Energetics", Satbayev University, Almaty, Kazakhstan. Email: kudaibergen.azamatd28@gmail.com, orcid id: https://orcid.org/0000-0003-1559-6348
2021 Kompleksnoe ispolʹzovanie mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik shikisattardy Keshendi Paidalanu  
The results of heat transfer mathematical model calculations in the "UO2-BeO" pellet are presented. The fuel pellet consists of uranium dioxide (UO2) and beryllium oxide (BeO) ceramics. Modeling of heat transfer was carried out by a system of generalized heat conduction equations with variable thermophysical properties. The calculated data of the temperature field in the fuel pellet were obtained using the COMSOL Multiphysics software code. The results of temperature calculations were compared
more » ... ith the data of other authors. The agreement of the calculated data shows the mathematical model and the COMSOL Multiphysics code algorithms correctness. Various arrangements of beryllium oxide ceramics BeO in a fuel pellet are considered. The arrangement of the BeO ceramics in the centre of the fuel pellet showed a noticeable decrease in temperature in the energy release zone. Calculations have shown that the composite fuel "UO2-BeO" is the most effective for regulating the thermal regime of fuel elements.
doi:10.31643/2021/6445.31 fatcat:i5ry32ks4zapld6gcqlh6up33q