Messine, an Eddy Current Parametric Model for Flaw Characterization

The MESSINE code (Model for Electromagnetic Simplified Simulation In Nondestructive Evaluation) has been developed at CEA/CEREM in order to characterize flaws in steam generator tubes. No analytical or numerical models, that are well adapted to this problem, have been found in the literature. Constructing a forward model by solving Maxwell’s equations seems rather difficult and numerical models (e.g. finite element approach) are not convenient, due to their long computation time. Thus, a new simplified parametric forward model has been constructed using the following three axes: • 2D defect-free configurations for studying the detection capabilities, • 2D and 3D configurations with defects to obtain signal expertise, • defect characterization i.e., eddy current signal inversion.