Validation of CIVA simulation tools for UT examination
G. Cattiaux, S. Mahaut, S. Lonné, S. Chatillon,
4th International Conference on NDE in relation to Structural Integrity for Nuclear and Pressurized Components, London, December 6-8, 2004
Rapport DSR 47
Ultrasonic simulation tools have been gathered in the Civa software developed at CEA (the French Atomic Energy Commission), in order to conceive, optimise and predict the performances of various inspection techniques. Those models are based on semi-analytical kernels and numerical integration, so that realistic 3D and time transient configurations may be dealt with, and specific emphasis is made to optimise time computations, so that these models can be used for parametric studies. These simulation tools include beam propagation and defect scattering models, thus the whole inspection performances may be predicted for a wide range of applications (phased arrays, complex specimen geometry and/or materials, various flaws). This paper adresses some experimental validations of those models, in the frame of collaboration with IRSN (Institute for Radiological Protection and Nuclear Safety). Applications concerned include validation of inspection predictions over realistic configurations (in terms of probes, specimen, and flaws), which demonstrate the ability of the software to accurately predict the actual performances of various inspection techniques.