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vol 63 / July, 2020
Article

DOI 10.17586/0021-3454-2019-62-8-741-748

UDC 53.072; 53:004

NUMERICAL MODELING OF NATURAL CONVECTION OF LIQUID DEUTERIUM UNDER CONDITIONS OF A REACTOR HEAT LOAD

A. P. Serebrov
Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre “Kurchatov Institute” (NRC “Kurchatov Institute” - PNPI), Gatchina, 188300, Russian Federation; Chief scientific researcher


A. O. Koptyukhov
Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre “Kurchatov Institute” (NRC “Kurchatov Institute” - PNPI), Gatchina, 188300, Russian Federation; ITMO University, Saint Petersburg, 197101, Russian Federation; Engineer; Postgraduate


V. A. Lyamkin
Petersburg Nuclear Physics Institute named by B.P. Konstantinov of National Research Centre “Kurchatov Institute” (NRC “Kurchatov Institute”— PNPI), Gatchina, 188300, Russian Federation ; Senior Researcher


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Abstract. In St. Petersburg Nuclear Physics Institute, on the basis of the WWR-M reactor, a high-flux source of ultracold neutrons is created with liquid deuterium as a pre-moderator of reactor neutrons. Results of calcu-lations of liquid deuterium convective flow in the source's deuterium capsule are presented depending on the heat flux and boundary conditions. The structure of the flow, temperature field, and velocity of liquid deuterium in the source of ultracold neutrons are numerically studied. The possibility of providing the thermal regime of a deuterium chamber with a heat flux power of up to 850 watts is proven. The dependence of the flow structure on the boundary conditions is analyzed. The influence of this dependence on the velocity field and heat flux is revealed.
Keywords: neutron physics, ultracold neutron source, standard model, numerical simulation, natural convection, WWR-M reactor

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