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URANIUM REFINING WASTE [1 record]

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Alphabetical list of terms

Record 1 1996-06-06

English

Subject field(s)
  • Mining Wastes
  • Nuclear Power Stations
CONT

Uranium Refining Wastes ... are produced as a result of refining the yellowcake received from uranium mine mills to uranium trioxide ..., and from the conversion of uranium trioxide to either uranium hexafluoride or uranium dioxide. The wastes tend to be sludges and residues containing calcium sulfate or carbonate (limed raffinate), calcium fluoride, magnesium trash, discarded equipment and decommissioning waste is also generated.

Key term(s)
  • uranium refining wastes

French

Domaine(s)
  • Déchets miniers
  • Centrales nucléaires
OBS

Extraction de l'uranium. [...] Après un tri radiométrique des roches extraites, les principales étapes du traitement sont une préparation mécanique (concassage, broyage), une mise en solution de l'uranium par attaque acide [...] ou basique [...]. La pulpe sortant de cette attaque subit une séparation solide-liquide qui fournit une liqueur contenant l'uranium qu'on purifie [...] puis dont on fait précipiter l'uranium essentiellement sous forme d'uranate. Au terme de ces traitements conduits sur le lieu d'extraction, on obtient des concentrés à 60-70 % d'uranium. Ces concentrés subissent ensuite un raffinage qui comprend deux phases, la purification et l'élaboration finale, exécutées dans une usine souvent éloignée du centre minier.

Key term(s)
  • déchets de raffinage d'uranium

Spanish

Campo(s) temático(s)
  • Escombros mineros
  • Centrales nucleares
Key term(s)
  • desechos del proceso de refinación del uranio
  • desechos resultante de la purificación del uranio
  • residuos de la purificación del uranio
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