A SIMILARITY CRITERION FOR SPHERICAL FUEL ELEMENTS FREE FALL VELOCITY IN CYLINDRICAL CHANNELS WITH VISCOUSE LIQUID-Reference-Cited by-同舟云学术

A SIMILARITY CRITERION FOR SPHERICAL FUEL ELEMENTS FREE FALL VELOCITY IN CYLINDRICAL CHANNELS WITH VISCOUSE LIQUID

Published:2021-10-01 Issue: Volume: Page:64-69
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Container-title:Problems of Atomic Science and Technology
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Author:

Andrieieva Oksana L.,Bulavin Leonid A.,Tkachenko Victor I.

Abstract

The introduction of nuclear high-temperature gas-cooled reactors (HTGR) with an active zone based on spherical fuel elements (SFE) poses the task of determining the velocity of their free fall in cylindrical channels with a viscous liquid. To solve it, the experimental data of other researchers are generalized, and for a certain range of Reynolds numbers the criterion of similarity for the velocity of free fall of spheres in cylindrical channels with water is found. The criterion is formulated on the basis of the Freud number. It is shown that from the dependence of the velocity of falling of the model sphere in a cylindrical vessel with water on the dimensionless diameter of the sphere, it is possible to determine the velocity of falling of the sphere in water, arbitrary.

Publisher

Problems of Atomic Science and Technology

Reference15 articles.

1. V.H. Grebennik, N.E. Kuharkin, H.H. Ponoma-rev-Stepnoj. Vysokotemperaturnye gazoohlazhdaemye reaktory – innovatsionnoe napravlenie razvitija atomnoj energetiki. M.: “Energoatomizdat”, 2008, 136 s. (in Russian).

2. A.G. Samojlov, V.S. Volkov, M.I. Solonin. Tep-lovydelyayushchie elementy yadernyh reaktorov: Ucheb. posobie dlya vuzov. M.: “Energoatomizdat”, 1996, 400 s. (in Russian).

3. V.F. Zelenskij, N.P. Odejchuk, V.K. Yakovlev, V.A. Gurin. Modern Status of Works on High-Temperature Gas-Cooled Reactors (HTGR) in the World and Prospects of their Application in Ukraine // PAST. Series “Physics of Radiation Effect and Radiation Materials Science” (94). 2009, N 4-2, р. 247-255.

4. Advances in Small Modular Reactor Technology Developments. A Supplement to: IAEA Advanced Reactors Information System (ARIS), 2018, Edition; http://aris.iaea.org

5. Hoai Nam Tran, Van Khanh Hoang. Core Characteristics of an OTTO Refueling Pebble Bed Reactor and Comparison with a Multi-Pass Scheme // Proceedings of the HTR 2012 Tokyo, Japan, October 28 – November 1. 2012, Paper HTR2012-5-025.