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Modeling and Visualization of Coolant Flow in a Fuel Rod Bundle of a Small Modular Reactor

Authors :
Sergei Dmitriev
Tatiyana Demkina
Aleksandr Dobrov
Denis Doronkov
Daniil Kuritsin
Danil Nikolaev
Alexey Pronin
Anton Riazanov
Dmitriy Solntsev
Source :
Fluids, Vol 9, Iss 10, p 235 (2024)
Publication Year :
2024
Publisher :
MDPI AG, 2024.

Abstract

This article presents the results of an experimental study of the coolant flow in a fuel rod bundle of a nuclear reactor fuel assembly of a small modular reactor for a small ground-based nuclear power plant. The aim of the work is to experimentally determine the hydrodynamic characteristics of the coolant flow in a fuel rod bundle of a fuel assembly. For this purpose, experimental studies were conducted in an aerodynamic model that included simulators of fuel elements, burnable absorber rods, spacer grids, a central displacer, and stiffening corners. During the experiments, the water coolant flow was modeled using airflow based on the theory of hydrodynamic similarity. The studies were conducted using the pneumometric method and the contrast agent injection method. The flow structure was visualized by contour plots of axial and tangential velocity, as well as the distribution of the contrast agent. During the experiments, the features of the axial flow were identified, and the structure of the cross-flows of the coolant was determined. The database obtained during the experiments can be used to validate CFD programs, refine the methods of thermal-hydraulic calculation of nuclear reactor cores, and also to justify the design of fuel assemblies.

Details

Language :
English
ISSN :
23115521
Volume :
9
Issue :
10
Database :
Directory of Open Access Journals
Journal :
Fluids
Publication Type :
Academic Journal
Accession number :
edsdoj.634978ea33ae424ab42fb4614d394fc5
Document Type :
article
Full Text :
https://doi.org/10.3390/fluids9100235