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In a system employing flowing liquid metal as a heat transfer medium in contact with tubular members containing a working fluid, i.e., steam, liquid metal leaks through the wall of the tubular member are detected by dislodging the liquid metal compounds forming in the tubular member at the leak loca

In a system employing flowing liquid metal as a heat transfer medium in contact with tubular members containing a working fluid, i.e., steam, liquid metal leaks through the wall of the tubular member are detected by dislodging the liquid metal compounds forming in the tubular member at the leak locations and subsequently transporting the dislodged compound in the form of an aerosol to a detector responsive to the liquid metal compound. In the application to a sodium cooled tubular member, the detector would consist of a sodium responsive device, such as a sodium ion detector.

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A method for detecting a liquid metal leak in a heated working fluid flow tube coaxially positioned within a liquid metal flow tube, comprising the steps of, removing said liquid metal and said working fluid from respective flow tubes, cooling said working fluid flow tube to produce a solid deposit

A method for detecting a liquid metal leak in a heated working fluid flow tube coaxially positioned within a liquid metal flow tube, comprising the steps of, removing said liquid metal and said working fluid from respective flow tubes, cooling said working fluid flow tube to produce a solid deposit of liquid metal reaction products at a location of said working fluid flow tube corresponding to a tube leak, dislodging particles of said solid deposit, and detecting said particles to determine the presence of a leak in said working fluid flow tube.