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Computational and experimental investigation of fretting corrosion and vibrations of VVÉR-1000 fuel assemblies

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Abstract

The methods and results of computational and experimental investigations of fretting corrosion and the characteristic vibrations of VVÉR-1000 fuel assemblies are presented. Fretting corrosion has been studied in a laboratory facility simulating fragments of the units that couple fuel elements with spacer lattices and the bottom support plate of the fuel assemblies. A mathematical model is developed for vibrations in the mechanical system fuel-element fragment + spacer-lattice fragment. A computational and experimental modal analysis of a fuel assembly is performed. The characteristic frequencies, forms, and decrements of fuel-assembly vibrations are determined. Satisfactory agreement is obtained between the computational and experimental results. The dependence of the dynamics of fretting corrosion on operational factors is evaluated.

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Authors and Affiliations

  1. Institute of Machine Engineering, Russian Academy of Sciences, Russia

    Yu. N. Drozdov

  2. Russian Science Center Kurchatov Institute, Russia

    A. A. Tutnov, An. A. Tutnov & E. E. Alekseev

  3. Gidropress OKB, Russia

    V. V. Makarov & A. V. Afanas’ev

Authors
  1. Yu. N. Drozdov
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  2. A. A. Tutnov
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  3. An. A. Tutnov
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  4. E. E. Alekseev
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  5. V. V. Makarov
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  6. A. V. Afanas’ev
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__________

Translated from Atomnaya Énergiya, Vol. 102, No. 6, pp. 336–344, June, 2007.

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Drozdov, Y.N., Tutnov, A.A., Tutnov, A.A. et al. Computational and experimental investigation of fretting corrosion and vibrations of VVÉR-1000 fuel assemblies. At Energy 102, 416–425 (2007). https://doi.org/10.1007/s10512-007-0066-3

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  • DOI: https://doi.org/10.1007/s10512-007-0066-3

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