Dynamic response of nuclear fuel assembly excited by pressure pulsations

Authors

  • Vladimír Zeman Faculty of Applied Sciences, University of West Bohemia
  • Zdeněk Hlaváč Faculty of Applied Sciences, University of West Bohemia

Keywords:

vibrations, nuclear fuel assembly, pressure pulsations, modal synthesis method, dynamic load

Abstract

The paper deals with dynamic load calculation of the hexagonal type nuclear fuel assembly caused by spatial motion of the support plates in the reactor core. The support plate motion is excited by pressure pulsations generated by main circulation pumps in the coolant loops of the primary circuit of the  nuclear power plant. Slightly different pumps revolutions generate the beat vibrations which causes an amplification of fuel assembly component dynamic deformations and fuel rods coating abrasion. The cyclic and central symmetry of the fuel assembly makes it possible the system decomposition into six identical revolved fuel rod segments which are linked with central tube and skeleton by several spacer grids in horizontal planes.

The modal synthesis method with condensation of the fuel rod segments is used for calculation of the normal and friction forces transmitted between fuel rods and spacer grids cells.

Downloads

Published

31-Dec-2012

Issue

Vol. 6 No. 2 (2012)

Section

Articles

License

Copyright (c) 2016 Applied and Computational Mechanics

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

“Dynamic response of nuclear fuel assembly excited by pressure pulsations” (2012) Applied and Computational Mechanics, 6(2). Available at: https://acm.kme.zcu.cz//article/view/187 (Accessed: 24 May 2025).