Equipment for leak testing of steam generators fuelled with liquid metal, especially liquid sodium

Two flowmeters are installed on the sodium pipe. The flowmeter pick-up electrodes are connected to a d-c analyzer, an analyzer of d-c voltage amplitude phase displacement, and to an analyzer of wave energy spectrum. In a leaking steam generator the sodium-water or sodium-water vapour reaction products cause alterations in the liquid sodium flow in the piping. The changes in the wave energy spectrum picked up by the flowmeters are analyzed and information obtained is applied to the safety and protection equipment. (J.B.)