HDPE 80 mil Floating Covers - CCD Tank LOCATION: Key Lake, Saskatchewan TIMEFRAME: Fall 2011 – Spring 2012 SCOPE OF WORK: Design of Floating Cover over CCD Tank PROJECT PARTNERS Cameco Corp MDH Engineering Saskachewan Red Engineering Edmonton North West Hydraulic Consultants (NHC) ChallengeThe overall objective was to design a oating cover over the surface of a counter- current decantation (CCD) tank operating in outdoor conditions at Key Lake in Saskatchewan. During winter months this location can observe temperatures as low as -40 C. The client spends signicant amount of capital and resources each year to maintain the liquid temperature in the tanks by injecting steam into the liquid. To keep the costs down they proposed insulating the walls and place a cover to improve the e ciency o

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