Fuel Pellets Based on Uranium Dioxide and Alloyed
with Nanodispersed Additives of Al(OH)₃ and TiO₂

V. S. Panov^a,*, V. Yu. Lopatin^a,**, L. V. Myakisheva^a,***, V. V. Malovik^b, and V. V. Martynov^b

^aNational University of Science and Technology “MISiS”, Leninskii pr. 4, Moscow, 119049 Russia

^bOAO Machine Building Plant (MSZ), ul. K. Marksa 12, Elektrostal’, Moscow oblast, 144001 Russia

Abstract—The influence of alloying additives Al(OH)₃ and TiO₂ on the structure and properties of uranium
dioxide fuel pellets is investigated. It is established that their introduction improves the characteristics of the
macrostructure and microstructure of fuel pellets and positively affects their properties. For example, the grain
size in the fuel pellet increases to 39 mm (instead of 10–15 mm in the case of usual technology), thenumber of
large (>10 mm) pores decreases, and the strength and thermal conductivity increase slightly.

Keywords: fuel pellet, uranium dioxide, aluminum hydroxide, titanium dioxide, microstructure, porosity,
strength, thermal conductivity, density

DOI: 10.3103/S1067821214030146

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