Computational modeling of the thermal and physical processes in the high-temperature gas-cooled reactor

Didenko D.V., Baluev D.E., Marov I.V., Nikanorov O.L., Rogozhkin S.A., Sorokin S.E.
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The development of a high-temperature gas-cooled reactor (HTGR) constituting a part of nuclear power-and-process station and intended for large-scale hydrogen production is now in progress in the Russian Federation. One of the key objectives in development of the high-temperature gas-cooled reactor is the computational justification of the accepted design.

The article gives the procedure for the computational analysis of thermal and physical characteristics of the high-temperature gas-cooled reactor. The procedure is based on the use of the state-of-the-art codes for personal computer (PC).

The objective of thermal and physical analysis of the reactor as a whole and of the core in particular was achieved in three stages. The idea of the first stage is to justify the neutron physical characteristics of the block-type core during burn-up with the use of the MCU-HTR code based on the Monte Carlo method. The second and the third stages are intended to study the coolant flow and the temperature condition of the reactor and the core in 3D with the required degree of detailing using the FlowVision and the ANSYS codes.

For the purpose of carrying out the analytical studies the computational models of the reactor flow path and the fuel assembly column were developed.

As per the results of the computational modeling the design of the support columns and the neutron physical characteristics of the fuel assembly were optimized. This results in the reduction of the total hydraulic resistance of the reactor and decrease of the maximum temperature of the fuel elements.

The dependency of the maximum fuel temperature on the value of the power peaking factors determined by the arrangement of the absorber rods and of the compacts of burnable absorber in the fuel assembly is demonstrated.

Keywords: high-temperature gas-cooled reactor, HTGR, core, fuel assembly, computational model, thermal physics, thermal hydraulics
Citation in English: Didenko D.V., Baluev D.E., Marov I.V., Nikanorov O.L., Rogozhkin S.A., Sorokin S.E. Computational modeling of the thermal and physical processes in the high-temperature gas-cooled reactor // Computer Research and Modeling, 2023, vol. 15, no. 4, pp. 895-906
Citation in English: Didenko D.V., Baluev D.E., Marov I.V., Nikanorov O.L., Rogozhkin S.A., Sorokin S.E. Computational modeling of the thermal and physical processes in the high-temperature gas-cooled reactor // Computer Research and Modeling, 2023, vol. 15, no. 4, pp. 895-906
DOI: 10.20537/2076-7633-2023-15-4-895-906
URL: http://crm-en.ics.org.ru/journal/article/3364/
Creative Commons License This work is licensed under a Creative Commons Attribution-NoDerivs 3.0 Unported License.

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