Subheading 284410: Uranium; Natural Uranium and its Compounds, Alloys, Dispersio … etc.
Subheading 284420: Uranium; Enriched in U235, Plutonium, their Compounds, Alloys … etc.
Subheading 284430: Uranium; Depleted in U235, Thorium, their Compounds, Alloys, … etc.
Subheading 284441: Radioactive Elements; Tritium and its Compounds; Alloys, Disp … etc.
Subheading 284442: Radioactive Elements; Actinium-225, 227, Californium-253, Cur … etc.
Subheading 284443: Radioactive Elements, Isotopes and Compounds; other Alloys, D … etc.
Subheading 284444: Radioactive Elements, Isotopes, Compounds N.E.C. in Heading N … etc.
Subheading 284450: Spent (Irradiated) Fuel Elements (Cartridges) of Nuclear Reac … etc.