Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES 28 INORGANIC CHEMICALS; ORGANIC OR INORGANIC COMPOUNDS OF PRECIOUS METAL, OFRARE-EARTH METALS, OF RADIOACTIVE ELEMENTS OR OF ISOTOPES 28 44 MIXTURES AND RESIDUES CONTAINING THESE PRODUCTS. 28 44 50 SPENT (IRRADIATED) FUEL ELEMENTS (CARTRIDGES) OF NUCLEAR REACTORS Commodity Code Description 28 44 50 00 SPENT (IRRADIATED) FUEL ELEMENTS (CARTRIDGES) OF NUCLEAR REACTORS