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Non-linear damping of sodium fast reactor fuel pins: Experimental analysis and numerical modelisation

Abstract : The fuel pins are the first containment barriers of a sodium fast reactor, and their integrity have to be preserved during dynamical loads, like earthquake events but also during the transport and handling of fuel sub-assemblies. The purpose of this paper is to understand the dynamical behavior of the fuel pins. A dedicated test bed has been used. Three different regimes of damping, dry or viscous depending of the displacement amplitude, are identified during the tests on fuel pins and explained by a simple analytical model. A complex finite element model is proposed and confronted to the experiment and lead to a better comprehension of the fuel pin non linear damping.
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https://hal-cea.archives-ouvertes.fr/cea-03132475
Contributor : Olivier Provitina <>
Submitted on : Friday, February 5, 2021 - 10:28:23 AM
Last modification on : Monday, July 19, 2021 - 3:15:29 PM

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Thomas Catterou, Victor Blanc, Guillaume Ricciardi, Stéphane Bourgeois, Bruno Cochelin. Non-linear damping of sodium fast reactor fuel pins: Experimental analysis and numerical modelisation. Nuclear Engineering and Design, Elsevier, 2020, 364, pp.110643. ⟨10.1016/j.nucengdes.2020.110643⟩. ⟨cea-03132475⟩

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