Communication Dans Un Congrès Année : 2018

Non destructive testing of concrete nuclear containment plants with surface waves : lab experiment on decimeter slabs and on the VeRCoRs mock-up

Résumé

The maintenance and evaluation of concrete nuclear containment walls is a major concern as they must, in case of an accident, ensure the confinement of the nuclear radiations and resist to the loads. A homemade multi-receiver multi-source dry contact linear probe to record ultrasonic surface waves on concrete in the frequency range [60?kHz - 200?kHz] has been used in this context. The measurement protocol includes the summation of up to 50 spatially distributed seismograms and the determination of the surface waves phase velocity dispersion curve. The probe has been tested against several concrete states under no loading (water saturation level, temperature damage). Then, the same measurements have been performed on sound and fire damaged slabs submitted to uniaxial loading (stress up to 30 % of the concrete compression resistance). It is shown that the robustness and precision of the surface waves measurement protocol make it possible to follow the stress level. In March 2017 a first experiment with this surface wave probe has been conducted on a reduced 1:3 scale nuclear containment plant (EDF VeRCoRs mock-up) under loading conditions that replicates that of decennial inspection. The surface wave phase velocity dispersion curves of each state are compared and cross-validated with other NDT results.

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hal-03261398 , version 1 (15-06-2021)

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Odile Abraham, Jean-Baptiste Legland, Olivier Durand, Jean-Marie Henault, Vincent Garnier. Non destructive testing of concrete nuclear containment plants with surface waves : lab experiment on decimeter slabs and on the VeRCoRs mock-up. 44th Annual Review of Progress in Quantitative Nondestructive Evaluation, Jul 2017, PROVO, United States. 6 p., ⟨10.1063/1.5031526⟩. ⟨hal-03261398⟩
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