Abstract—
This article addresses the development of approaches to numerically analyzing the processes of interaction between liquid metal sodium coolant and destructed fuel-pin components (fuel and steel in solid and liquid states). Such processes may occur during a severe accident involving core destruction, and also when fuel-pin components (fuel or cladding) heated to a high temperature release into the flow of relatively cold liquid coolant or when the molten fuel begins to melt the corium catcher. A dramatic growth of power caused by self motion of pins and stoppage of forced coolant circulation without actuation of the reactor plant’s active and passive safety systems are among possible events leading to accidents with such consequences. For simulating the thermal interaction, it is proposed to use a multicomponent thermally nonequilibrium model based on the solution of a system of mass, energy, and momentum conservation equations with the relevant relationships that take into account the specific features of thermal and mechanical interaction between the melt and coolant. Simulation of the processes is very important for determining pressure jumps in the reactor plant caused by release of destructed fuel-pin components into the coolant flow. Thermal interaction of fuel-pin components with the coolant may cause intense coolant evaporation and, as a consequence, the occurrence of drastic pressure jumps determined by the intensity of heat transfer from components to coolant and the amount of vapor produced. To find the rate of heat transfer between various components, a chart of heat-transfer modes and closing relationships corresponding to each mode are used.
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REFERENCES
L. V. Deitrich, “Experiments on transient fuel failure mechanisms — Selected ANL programs,” in Proc. Int. Working Group on Fast Reactors Specialists’ Meeting on Fuel Failure Mechanisms, Seattle, Wash., 11–16 May, 1975 (Argonne National Laboratory, Argonne, Ill., 1975).
G. P. DeVault, SIMMER-II Analysis of the CAMEL II C6 and C7 Experiments (Simulated Fuel Penetration into a Primary Control Assembly), Los Alamos National Laboratory Report (Los Alamos National Laboratory, Los Alamos, N.M., 1985).
H. Yamano and Y. Tobita, “Experimental analyses by SIMMER-III on duct-wall failure and fuel discharge/relocation behavior,” Mech. Eng. J. 1 (4), TEP0028 (2014). https://doi.org/10.1299/mej.2014tep0028
D. Magallon, H. Hohmann, and H. Schins, “Pouring of 100-kg-scale molten UO2 into sodium,” Nucl. Technol. 98, 79–90 (1992).
Yu. I. Zagorul’ko, V. G. Zhmurin, A. N. Volok, and Yu. P. Kovalev, “Experimental investigations of thermal interaction between corium and coolants,” Therm. Eng. 55, 235–244 (2008).
A. A. Butov, V. S. Zhdanov, I. A. Klimonov, I. G. Kudashov, A. E. Kutlimetov, P. D. Lobanov, N. A. Mosunova, A. A. Sorokin, V. F. Strizhov, E. V. Usov, and V. I. Chukhno, “Verification of the EUCLID/V2 code based on experiments involving destruction of a liquid metal cooled reactor’s core components,” Therm. Eng. 66, 302–309 (2019). https://doi.org/10.1134/S0040601519050033
A. A. Butov, V. S. Zhdanov, I. A. Klimonov, I. G. Kudashov, A. E. Kutlimetov, N. A. Mosunova, V. F. Strizhov, A. A. Sorokin, S. A. Frolov, E. V. Usov, and V. I. Chukhno, “The EUCLID/V2 code physical models for calculating fuel rod and core failures in a liquid metal cooled reactor,” Therm. Eng. 66, 293–301 (2019). https://doi.org/10.1134/S0040601519050021
E. V. Usov, A. A. Butov, V. I. Chukhno, I. A. Klimonov, I. G. Kudashov, V. S. Zhdanov, N. A. Pribaturin, N. A. Mosunova, and V. F. Strizhov, “Fuel pin melting in a fast reactor and melt solidification: Simulation using the SAFR/V1 module of the EVKLID/V2 integral code,” At. Energy 124, 147–153 (2018).
E. V. Usov, A. A. Butov, V. I. Chukhno, I. A. Klimonov, I. G. Kudashov, V. S. Zhdanov, N. A. Pribaturin, N. A. Mosunova, and V. F. Strizhov, “SAFR/V1 (EVKLID/V2 integral code module) aided simulation of melt movement along the surface of a fuel element in a fast reactor during a serious accident,” At. Energy 124, 232–237 (2018).
V. M. Alipchenkov, A. M. Anfimov, D. A. Afremov, V. S. Gorbunov, Yu. A. Zeigarnik, A. V. Kudryavtsev, S. L. Osipov, N. A. Mosunova, V. F. Strizhov, and E. V. Usov, “Fundamentals, current state of the development of, and prospects for further improvement of the new-generation thermal-hydraulic computational HYDRA-IBRAE/LM code for simulation of fast reactor systems,” Therm. Eng. 63, 130–139 (2016). https://doi.org/10.1134/S0040601516020014
E. V. Usov, A. A. Butov, G. A. Dugarov, I. G. Kudashov, S. I. Lezhnin, N. A. Mosunova, and N. A. Pribaturin, “System of closing relations of a two-fluid model for the HYDRA-IBRAE/LM/V1 code for calculation of sodium boiling in channels of power equipment,” Therm. Eng. 64, 504–510 (2017). https://doi.org/10.1134/S0040601517070102
R. Schins, D. Magallon, S. Giuliani, and F. S. Gunnerson, “Pouring of molten UO2, UC and Al2O3 in sodium: Interactions and debris; theoretical analysis,” Eur. Appl. Res. Rep. 7, 577–672 (1986).
F. Kreith and W. Z. Black, Basic Heat Transfer (Harper and Row, New York, 1980; Mir, Moscow, 1983).
H. M. Kotowski and C. Savatteri, “Fundamentals of liquid metal boiling thermohydraulics,” Nucl. Eng. Des. 82, 281–304 (1984).
M. Farahat and D. Eggen, “Pool boiling in subcooled sodium at atmospheric pressure,” Nucl. Eng. Des. 53, 240–253 (1974).
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This study was carried out within the framework of state contract no. N.4o.241.19.21.1068 dated April 14, 2021 for carrying out research works “Development of Integrated New-Generation Systems of Codes for Development of Nuclear Reactors and Their Safety Substantiation, Designing of Nuclear Power Plants, and Development of Nuclear Fuel Cycle Technologies and Facilities. Stage of 2021–2023.”
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Translated by V. Filatov
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Usov, E.V., Chukhno, V.I., Klimonov, I.A. et al. Simulating the Thermal Interaction between Fuel and Sodium Coolant Using the EUCLID/V2 Integrated Code. Therm. Eng. 69, 838–843 (2022). https://doi.org/10.1134/S004060152211009X
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DOI: https://doi.org/10.1134/S004060152211009X