Transmutation of nuclides in the blanket of a thermonuclear neutron source
https://doi.org/10.18384/2310-7251-2023-2-38-50
Abstract
Aim. We evaluate the uncertainties of modern nuclear data libraries and perform a comparative analysis of the induced activity of the blanket of a thermonuclear neutron source containing uranium-238 and thorium-232 nuclides.
Methodology. The obtained data on the activity of unstable nuclides formed in the blanket of a thermonuclear reactor are analyzed.
Results. The results of the studies show that the residual activity of the discharged blanket with U-238 is approximately two-to-three times greater than the activity of Th-232 normalized by one formed fissile nuclide. To make the activity of the unloaded uranium blanket similar to that of the Th-232-based blanket, a slightly longer exposure time is required.
Research implications. The obtained results can be used to optimize the blanket of a thermonuclear neutron source.
Keywords
estimated nuclear data,
neutron cross sections,
thermonuclear reactor,
blanket,
energy release,
activity
Supporting agencies: This research was supported by an RFBR grant No. 19-29-02011 «Development of a complex mathematical model of a thermonuclear reactor blanket for fundamental research of physical processes of radiation transfer, isotopic evolution and radiation loads».
About the Authors
V. D. Davidenko
National Research Center Kurchatov Institute
Russian Federation
Russian Federation
Vladimir D. Davidenko – Dr. Sci. (Engineering), Departmental Head, Department of Physics and Energy Modeling
pl. Akad. Kurchatova 1, Moscow 123182
I. I. Dyachkov
National Research Center Kurchatov Institute
Russian Federation
Russian Federation
Ivan I. Dyachkov – Research Assistant, Laboratory for Modeling Energy Development
pl. Akad. Kurchatova 1, Moscow 123182
M. V. Ioannisian
National Research Center Kurchatov Institute
Russian Federation
Russian Federation
Mihail V. Ioannisian – Cand. Sci. (Phys.-Math.), Laboratory Head, Laboratory for Modeling Energy Development
pl. Akad. Kurchatova 1, Moscow 123182
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