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[References: p. 462 (7 tit.)]

This work is dedicated to exploring possibilities of using alternative thorium-based fuel compositions in VVER-type reactor. The article describes comparison between standard uranium dioxide fuel and perspective fuel composition: thorium dioxide, mixed thorium and plutonium dioxides. The calculation result show that using of perspective fuel composition caused to improving of physical and economical characteristics of reactor core. Furthermore, investigated fuel provide effective burnup, that increase fuel cycle length. Moreover, growth of using fertile isotopes is shown in comparison with standard fuel.