Mining and Milling
Mining and Milling : Mining in a mine that yields radioactive ore containing uranium series or thorium series radionuclides either in amounts or concentrations sufficient to warrant exploitation or, when present in conjunction with other substances being mined, in amounts or concentrations that require radiation protection measures to be taken; and processing of radioactive ores from such mines to produce a chemical concentrate. This definition was restricted to those mining and processing operations aimed at extracting uranium series or thorium series radionuclides and those aimed at extracting other substances from ore that represent a significant radiological hazard. This definition has been included for information only. The terms mining and milling should be used with their normal dictionary definitions, qualified where necessary (e.g. by use of the term radioactive). Strictly speaking, milling in the context of the processing of minerals is the processing of ore to reduce its particle size, especially by crushing or grinding. However, in the context of this definition, the term milling is used in a broader sense to include additional processing - for example, hydrometallurgical processing. Owing to the possibility of confusion, the use of the word milling in this broader sense, in this expression or elsewhere, is discouraged. ! See: Mine Or Mill Processing Radioactive Ores
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