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Poster De Conférence Année : 2023

A new generation of wear machines at the CEA

Résumé

The Mechanical and Thermal Studies Service of CEA Paris-Saclay is involved, within the Tripartite Institute CEA-EDF-Framatome, in a research project on wear aiming to make progress on the understanding of this phenomenon which affects some of the vessel internals within the French nuclear power plant fleet and to develop effective investigation tools on the experimental and numerical axes. In this context, a new generation of tribometers is under development at the CEA. These new test rigs aim to be as robust and enduring as the old test facilities, but more efficient in terms of stationarity and repeatability of the tests thanks to a control of the kinematic and mechanical conditions. The first operational machine of a kind is called MUSE-Cold. It operates at room temperature, in air or under water. It allows studying the wear of tubular elements by imposing different types of movements within their supports, with or without gaps between the parts to be worn. The tubular element is set in motion by two electromagnetic "actuators" located perpendicularly and controlled by a software developed in LabVIEW. This technology allows performing various wear tests (sliding impact, fretting, permanent sliding). Vibration qualification tests were carried out on MUSE-Cold, in air, in order to establish a performance mapping of the tribometer. In addition to these experiments, and in order to optimize the cost and time of realization, a mechanical model was developed in MATLAB. This model allows simulating the operation of each actuator of the machine. The simulation results obtained have made it possible to complete and enhance the database of test results. They constitute the performance mapping of MUSE-Cold, in terms of repeatability of experiments, amplitude of movements, impact frequency and magnitudes of impact forces. MUSE-Cold constitutes the mechanical internals of the future MUSE-Hot tribometer in PWR environment.
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Dates et versions

cea-04355198 , version 1 (20-12-2023)

Identifiants

  • HAL Id : cea-04355198 , version 1

Citer

Jean-Luc Fayard, Stanislas Boureau, Franck Ruffet, Xavier Delaune, Philippe Piteau, et al.. A new generation of wear machines at the CEA. Wear of Materials, Apr 2023, Banff, Canada. 2023. ⟨cea-04355198⟩
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