A promising alternative to uranium dioxide has been selected and its use for expanding the resource provision of the modern nuclear energy industry has been justified.Thorium-plutonium composite enriched by 7% in plutonium, loaded into fuel elements in the form of tablets, was used as fuel. To achieve the highest productivity, the water-fuel ratio has been changed to 1.2, which allows achieving a record campaign of 1287.5 days. Note that the installation works only in a supercritical state throughout the entire working cycle. The computational studies were performed using the verified calculation code WIMS-D5B (ENDF/B-Ⅶ.0) and modern constant software. The neutron-physical characteristics of the installation were modeled taking into account the changes in the internal structure of the microgranulated fuel caused by the controlled fission reaction and the subsequent migration of fission fragments. When calculating the reactor parameters, the power is assumed to be unchanged, equal to the maximum achievable.
$^1$National Research Tomsk Polytechnic University, Institute of High Technology Physics
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