Radiative and Convective Heat Transfer in the Gas Cavity of VVER-1200 Melt Trap

Heat transfer in the gas cavity of the melt trap for the VVER-1200 core is studied. A model problem is solved numerically in a configuration where the cavity boundaries are close to that obtained after the formation of the melt pool. Heat transfer by radiation is calculated by three methods: in the...

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Bibliographic Details
Published in:Atomic energy (New York, N.Y.) N.Y.), 2018-12, Vol.125 (2), p.112-118
Main Authors: Kamenskaya, D. D., Tarasov, O. V., Filippov, A. S., Valetov, D. K.
Format: Article
Language:English
Subjects:
Approximation
Boundaries
Computer applications
Convection
Convective heat transfer
Energy industry
Hadrons
Heat transfer
Heavy Ions
Mathematical models
Nuclear Chemistry
Nuclear Energy
Nuclear Physics
Nuclear power plants
Nuclear reactors
Optical density
Physics
Physics and Astronomy
Radiation
Thermal radiation
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Summary:Heat transfer in the gas cavity of the melt trap for the VVER-1200 core is studied. A model problem is solved numerically in a configuration where the cavity boundaries are close to that obtained after the formation of the melt pool. Heat transfer by radiation is calculated by three methods: in the approximation of a transparent medium taking account of the angular coefficients of radiation emission of sections of the cavity boundaries, by the DTRM method suitable for calculating radiation transfer in a medium with arbitrary optical density, and by the diffusion method in the Rosseland approximation. It is shown that the dominant mechanism is thermal radiation; the contribution of convection of the gas is relatively small. The influence of the choice of computational method on heat transfer in a gas cavity with different absorption is evaluated.
ISSN:1063-4258
1573-8205
DOI:10.1007/s10512-018-0451-0