Cold trap for purifying liquid sodium containing impurities

摘要

Cold trap for purifying liquid sodium containing impurities of the type comprising, in a sealed enclosure cooled by a cooling fluid flowing in contact with its outer surface, in the upper part an economizer for lowering the temperature of the hot sodium and ensuring its introduction into the trap, and in the lower part the actual trap containing a filter plug, kept at its cold point temperature, wherein the enclosure is annular, the filter plug being located in the space between two concentric cylindrical ferrules.