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A method for the clarification of uranium pregnant solutions using a high-rate floc blanket was developed from laboratory scale through pilot-plant testing to full-scale production by the Anglo American Research Laboratories. The high efficiency of the hopper clarification permitted the removal of the leaf clarifiers at Western Deep Levels uranium plant. Secondary clarification is now achieved by further unaided gravity settling in the storage tanks. 12 000 - 17 000 tons of countercurrent-decantation overflow with a suspended solids concentration of 500 - 600mg/l is clarified to less than 30 mg/l., A method for the clarification of uranium pregnant solutions using a high-rate floc blanket was developed from laboratory scale through pilot-plant testing to full-scale production by the Anglo American Research Laboratories. The high efficiency of the hopper clarification permitted the removal of the leaf clarifiers at Western Deep Levels uranium plant. Secondary clarification is now achieved by further unaided gravity settling in the storage tanks. 12 000 - 17 000 tons of countercurrent-decantation overflow with a suspended solids concentration of 500 - 600mg/l is clarified to less than 30 mg/l.