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  1. AN ECONOMIC EVALUATION OF ULTIMATE DISPOSAL OF LIQUID RADIOACTIVE WASTES BY THE FLUIDIZED BED CALCINATION PROCESS [electronic resource]

    Washington, D.C. : U.S. Atomic Energy Commission ; Oak Ridge, Tenn. : distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1962

    The costs of fluidized bed calcining of the acidic and re-acidified forms of Purex and Thorex wastes were determined. The wastes were assumed produced by a chemical-processing plant recovering unburned fuel from 1500 tons/ yr of U converter fuel at a burnup of 10,000 Mwd/ton and 270 tons/yr of Th converter fuel at 20,000 Mwd/ton. Also, investment costs for storage of the calcine in vented, air cooled, annular bins installed in underground concrete valuts were determined. The cost of fluidized bed calcining was determined at processing rates of 45, 80, and 75 gph for solids storage in bins varying from 3 to 22 in. thick and installed in underground concrete vaults containing 4, 12, 20, and 40 nested annular bins, each nest with an overall diameter of up to 12.5 ft. Aging had negligible effect on costs, except as it permitted thicker bins to be used. The lowest cost, 0.47 x 10/sup -2/ mills/kwh/sub e/, was for processing acidic Purex and Thorex wastes at 75 gph with storage in an underground concrete vault contnining 40 of the 12.5-ftdia. nested bin arrays. And the highest cost, 2.9 x 10/sup -2/ mills/kwh/sub e/, was for processing reacidified Purex and Thorex wastes at 45 gph with storage in an underground concrete vault containing 4 nested bin arrays. (auth)

    Online OSTI

  2. RADIOACTIVE WASTE DISPOSAL PROJECTS. IDAHO CHEMICAL PROCESSING PLANT TECHNICAL PROGRESS REPORT FOR JULY-SEPTEMBER 1959 [electronic resource]

    Salt Lake City, Utah : Phillips Petroleum Company ; Oak Ridge, Tenn. : distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1960

    The progress of extensive laboratory and pilot plant investigations on the fluidized bed process for the con version of radioactive liquid wastes to solids is reported. These studies are directed toward obtaining information on the dynamics of fluidized bed operation, the removal of volatile fission products and solids particles from gases, the development of equipment and operating techniques, and the various long term disposal aspects of all radioactive wastes. Laboratory studies on the removal of volatile ruthenium from a simulated calciner off-gas showed the removal efficiency of silica gel to decrease with successive wetting and drying cycles. Electrostatic precipitators were found to have a higher removal efficiency for solid particles (alumina) when a wetted wall rather than a dry wall type was used. Tests to determine the distribution of ruthenium in a pilot plant calciner were performed. Pilot plant data on particle growth in a fluidized bed were compared with theoretical equations. Operating experience with a NaK heat transfer system, and with liquid flow controllers is reported. The results of a series of qualitative tests to determine the likelihood of an explosive reaction should NaK leak into a fluidized bed calciner indicated that such a reaction is unlikely. A NaK leak that occurred at a welded junction was attributed to thermal overstressing of the metal and not due to corrosion. Calcium fluoride-impregnated Teflon was found to be a superior gasketing material, both chemically and mechanically, to pure Teflon. A literature survey on the chemistry of zirconium in a calcination process suggested the possibility of calcination in contact with silica and a laboratory unit is being installed to study the process. The hydraulics of a pulsed plate solids-liquid contactor and its associated equipment were determined. A preliminary investigation was started of the possibility of using metallizing techniques to surface coat solid particles and thereby reduce the leaching of fission products when contacted with ground water. Construction of a demonstrational fluidized bed calciner was approximately half completed; however, the national steel strike has slowed the construction schedule and the completion date cannot be estimated until the strike is settled. Process and equipment reviews of the facility and the results of thermal conductivity measurements on Idaho sands are reported. (auth)

    Online OSTI

  3. PNEUMATIC ATOMIZING NOZZLES IN FLUIDIZED BED CALCINING. I. CALIBRATION TESTS [electronic resource]

    Washington, D.C. : U.S. Atomic Energy Commission ; Oak Ridge, Tenn. : distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 1961

    The results of test stand studies of a pneumatic atomizing nozzle to be used in the Demonstrational Waste Calcining Facility at the Idaho Chemical Processing Plant are presented. Atomization and performance characteristics are described. The liquid feed control system for the Demonstrational Waste Calciner is compared with results of bench scale tests, and recommendations are made for improving the system. (auth)

    Online OSTI

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