Laboratory for Mathematical Modelling
of Environmental and Technological Processes

R. Guichou, P. Tordjeman, W. Bergez, R. Zamansky, K. Paumel

Experimental Study of Bubble Detection in Liquid Metal


Bubble detection in liquid metal is an important issue for various technological applications. For instance, in the framework of Sodium Fast Reactors conception, the presence of gas in the sodium flow of the primary and secondary loops is a problematic of crucial importance for surety and reliability. Here, the two main measurement methods of gas in sodium are Ultrasonic testing and Eddy-current testing; we investigate the second method in our study. In a first approach, we have performed experiments with liquid metal – galinstan – containing insulating spherical beads of millimeter order. The liquid metal is probed with an Eddy-current Flowmeter (ECFM) in order to detect the beads, and characterize their diameter and position. Results show that the signal measured by the ECFM is correlated to the effect of these parameters. Finally, an analytical model is proposed and compared to the experimental results.

Full paper

Proceedings of the VIII International Scientific Colloquim "Modelling for Materials Processing", Riga, Latvia, (2017), pp. 277-282.