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Experimental investigation of spacer grid effect on shear stress distribution in models of fuel assemblies

Experimental investigation of spacer grid effect on shear stress distribution in models of fuel... To assess the spacer grid effect on the liquid flow disturbance, the shear stress on the surface of a vertical rod — a fuel element simulator — was measured in seven-rod models of fuel assemblies differing in spacer grid sizes, diameter of rods (fuel element simulators), and relative distance between them. Data on axial distribution of shear stress are presented. An increase in the averaged and pulsation wall shear stresses directly behind the grid due to liquid flow disturbance and extinction of this effect far from the grid is shown. The results of this research can be applied to verify the design codes used in hydrodynamic predictions of reactors. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Thermophysics and Aeromechanics Springer Journals

Experimental investigation of spacer grid effect on shear stress distribution in models of fuel assemblies

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Publisher
Springer Journals
Copyright
Copyright © N.A. Pribaturin, P.D. Lobanov, V.V. Randin, O.N. Kashinsky, A.S. Kurdyumov, M.A. Vorobyev, and S.M. Volkov 2021
ISSN
0869-8643
eISSN
1531-8699
DOI
10.1134/s0869864321040065
Publisher site
See Article on Publisher Site

Abstract

To assess the spacer grid effect on the liquid flow disturbance, the shear stress on the surface of a vertical rod — a fuel element simulator — was measured in seven-rod models of fuel assemblies differing in spacer grid sizes, diameter of rods (fuel element simulators), and relative distance between them. Data on axial distribution of shear stress are presented. An increase in the averaged and pulsation wall shear stresses directly behind the grid due to liquid flow disturbance and extinction of this effect far from the grid is shown. The results of this research can be applied to verify the design codes used in hydrodynamic predictions of reactors.

Journal

Thermophysics and AeromechanicsSpringer Journals

Published: Jul 1, 2021

Keywords: experiment; fuel assembly; fuel element; shear stress; spacer grid

References