EDN: OXRUCP
Authors & Affiliations
Melnikov I.A., Shmelkov G.B., Golubev M.A., Velikanov A.V.
National Research Center “Kurchatov Institute”, Moscow, Russia
Shmelkov G.B. – Junior Researcher. Contacts: 1, pl. Akademika Kurchatova, Moscow, Russia, 123098. Tel.: +7 (916) 269-83-21; e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it..
Melnikov I.A. – Deputy Head of Department, Cand. Sci. (Tech.).
Golubev M.A. – Junior Researcher.
Velikanov A.V. – Junior Researcher.
Abstract
The article presents the results of simulation of radiation heat transfer from the corium surface to the core catcher’s structures, located above, as a part of the analysis of hypothetical severe accident at the stage of cooling of corium at the core catcher for the NPP-2006 project. This process was simulated with the THERA module of the TSAR application package developed at the National Research Center “Kurchatov Institute”. The article presents a description of the calculation procedure based on zonal method for radiation heat transfer simulation. The spectral-line-weighted sum-of-grey-gases (SLWSGG) approach is used to calculate absorbing and emitting properties of a vapor-gas mixture in the computational domain. The results of simulation are presented in the form of density distribution of the net radiation fluxes over the surfaces of the cantilever truss. Also the article presents the results of simulation of the conjugate non-stationary problem of radiant heating of cantilever truss from the melt surface and time dependences of cantilever truss temperature. Based on the results of thermal design was obtained an estimate of the time interval during which it is advisable to supply water onto the melt surface to limit the thermal effect from the melt on the cantilever truss.
Keywords
simulation, radiation heat transfer, zonal method, melt, corium, core catcher, severe accident, VVER-1200
Article Text (PDF, in Russian)
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Problems of Atomic Science and Technology. Series: Nuclear and Reactor Constants, 2024, no. 4, 4:17
