Mining of uranium and thorium ores

This class includes: - mining of ores chiefly valued for uranium and thorium content: pitchblende etc. - concentration of such ores - manufacture of yellowcake

This class excludes: - enrichment of uranium and thorium ores, see 20.13 - production of uranium metal from pitchblende or other ores, see 24.46 - smelting and refining of uranium, see 24.46