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Design requirements for uranium ion exchange from acidic solutions in a fluidized system

Description: A fluidized, countercurrent ion-exchange system was developed, operated, and evaluated by the Bureau of Mines in support of its objective to help assure an adequate uranium supply for future national needs. The system consisted of integrated multiple-compartment absorption and elution columns in which the solution flows are continuous, except for short periods when resin increments are withdrawn. The exchange of uranyl sulfate between a simulated acid-leach-uranium solution and a strong-base, i… more
Date: January 1, 1974
Creator: Traut, D.E.; Nichols, I.L. & Seidel, D.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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EERC Center for Biomass Utilization 2005

Description: Biomass utilization is one solution to our nation’s addiction to oil and fossil fuels. What is needed now is applied fundamental research that will cause economic technology development for the utilization of the diverse biomass resources in the United States. This Energy & Environmental Research Center (EERC) applied fundamental research project contributes to the development of economical biomass utilization for energy, transportation fuels, and marketable chemicals using biorefinery methods … more
Date: July 28, 2008
Creator: Zygarlicke, C. J.; Schmidt, D. D.; Olson, E. S.; Leroux, K. M.; Wocken, C. A.; Aulich, T. A. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heat Exchanger Design Options and Tritium Transport Study for the VHTR System

Description: This report presents the results of a study conducted to consider heat exchanger options and tritium transport in a very high temperature reactor (VHTR) system for the Next Generation Nuclear Plant Project. The heat exchanger options include types, arrangements, channel patterns in printed circuit heat exchangers (PCHE), coolant flow direction, and pipe configuration in shell-and-tube designs. Study considerations include: three types of heat exchanger designs (PCHE, shell-and-tube, and helical… more
Date: September 1, 2008
Creator: Oh, Chang H. & Kim, Eung S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Innovative solar thermochemical water splitting.

Description: Sandia National Laboratories (SNL) is evaluating the potential of an innovative approach for splitting water into hydrogen and oxygen using two-step thermochemical cycles. Thermochemical cycles are heat engines that utilize high-temperature heat to produce chemical work. Like their mechanical work-producing counterparts, their efficiency depends on operating temperature and on the irreversibility of their internal processes. With this in mind, we have invented innovative design concepts for two… more
Date: February 1, 2008
Creator: Hogan, Roy E. Jr.; Siegel, Nathan P.; Evans, Lindsey R.; Moss, Timothy A.; Stuecker, John Nicholas (Robocasting Enterprises, Albuquerque, NM); Diver, Richard B., Jr. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Temperature Profile Measurements in a Newly Constructed 30-Stage 5 cm Centrifugal Contactor pilot Plant

Description: An annular centrifugal contactor pilot plant incorporating 30 stages of commercial 5 cm CINC V-02 units has been built and operated at INL during the past year. The pilot plant includes an automated process control and data acquisitioning system. The primary purpose of the pilot plant is to evaluate the performance of a large number of inter-connected centrifugal contactors and obtain temperature profile measurements within a 30-stage cascade. Additional solvent extraction flowsheet testing usi… more
Date: September 1, 2008
Creator: Garn, Troy G.; Meikrantz, Dave H.; Greenhalgh, Mitchell R. & Law, Jack D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Numerical simulation of the countercurrent flow in a gas centrifuge

Description: We present a finite difference method for the numerical simulation of the axisymmetric countercurrent flow in a gas centrifuge. A time-marching technique is used to relax an arbitrary initial condition to the desired steady-state solution. All boundary layers can be resolved, and nonlinear effects may be included. Numerical examples are presented. We conclude that this technique is capable of predicting accurately the performance of a wide variety of machines under all operating conditions of i… more
Date: March 1, 1983
Creator: Cloutman, L.D. & Gentry, R.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fractured Petroleum Reservoirs

Description: The four chapters that are described in this report cover a variety of subjects that not only give insight into the understanding of multiphase flow in fractured porous media, but they provide also major contribution towards the understanding of flow processes with in-situ phase formation. In the following, a summary of all the chapters will be provided. Chapter I addresses issues related to water injection in water-wet fractured porous media. There are two parts in this chapter. Part I covers … more
Date: June 11, 1999
Creator: Firoozabadi, Abbas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Chemical Equilibria and Reaction Rates for Hydrofluorination of UO$sub 2$ From "Ammonium Diuranate" and From UO$sub 3$

Description: Reaction rates for the hydrofluorination of UO/sub 2/ derived from two widely different source materials (sulfated pot-denitrated UO/sub 3/ and "ammonium diuranate," (ADU)) were determined in a thermobalance over a wide range of temperatures (460 deg F to 1150 deg F) and with several HF--H/sub 2/O gas phase mixtures varying from 20 to 100 per cent HF. These data were then organized to yield single plots for each type of feed material. From these plots, maximum instantaneous reaction rates may b… more
Date: March 12, 1958
Creator: Briggs, G. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

RESULTS OF THE EXTRACTION-SCRUB-STRIP TESTING USING AN IMPROVED SOLVENT FORMULATION AND SALT WASTE PROCESSING FACILITY SIMULATED WASTE

Description: The Office of Waste Processing, within the Office of Technology Innovation and Development, is funding the development of an enhanced solvent - also known as the next generation solvent (NGS) - for deployment at the Savannah River Site to remove cesium from High Level Waste. The technical effort is a collaborative effort between Oak Ridge National Laboratory (ORNL) and Savannah River National Laboratory (SRNL). As part of the program, the Savannah River National Laboratory (SRNL) has performed … more
Date: January 9, 2012
Creator: Peters, T.; Washington, A. & Fink, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interfacial Area Transport and Regime Transition in Combinatorial Channels

Description: . This study investigates the geometric effects of 90-degree vertical elbows and flow configurations in two-phase flow. The study shows that the elbows make a significant effect on the transport characteristics of two-phase flow, which includes the changes in interfacial structures, bubble interaction mechanisms and flow regime transition. The effect of the elbows is characterized for global and local two-phase flow parameters. The global two-phase flow parameters include two-phase pressure, in… more
Date: January 28, 2011
Creator: Kim, Seugjin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Strictly hyperbolic models of co-current three-phase flow withgravity

Description: We study the character of the equations in the traditional formulation of one-dimensional immiscible three-phase flow with gravity, in the limit of negligible capillarity. We restrict our analysis to co-current flow required for a displacement process; in cases of mixed co-current and counter-current flow, capillarity effects cannot be dropped from the formulation. The model makes use of the classical multiphase extension of Darcy's equation. It is well known that, if relative permeabilities ar… more
Date: November 18, 2002
Creator: Juanes, Ruben & Patzek, Tadeusz W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Improving Efficiency of a Counter-Current Flow Moving Bed Granular Filter

Description: The goal of this research is to improve the performance of moving bed granular filters for gas cleaning at high temperatures and pressures. A second goal of the research is to optimize the performances of both solids and gas filtering processes through appropriate use of granular bed materials, particle sizes, feed rates etc. in a factorial study. These goals are directed toward applications of advanced coal-fired power cycles under development by the U.S. Department of Energy including pressur… more
Date: September 18, 2002
Creator: Colver, G.M.; Brown, R.C.; Shi, H. & Soo, D.S-C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Physics of Off-Axis Electron Cyclotron Current Drive

Description: Electron cyclotron current drive is a key option for driving current off-axis in a tokamak, as needed for example for current profile control or for suppression of neoclassical tearing modes. Experiments in DIII-D at low beta have shown that the partial cancellation of the Fisch-Boozer co-current by the Ohkawa counter-current can cause strong deterioration of the current drive efficiency at larger minor radius. However, more recent experiments at higher power have shown that the loss in efficie… more
Date: July 1, 2002
Creator: Prater, R.; Petty, C. C.; Harvey, R.; Lin-Liu, Y. R.; Lohr, J. M. & Luce, T. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Counter-current flow limitation in thin rectangular channels

Description: The phenomenon of counter-current flow limitation (CCFL) in thin rectangular channels is important in determining the heat removal capability of research reactors which use plate-type fuel elements similar to the MTR design. An analytical expression for predicting CCFL in narrow rectangular channels was derived from the momentum equations for the liquid and gas phase. The model assumes that the liquid downflow is in the form of a film along the narrower side walls of the channel, while the gas … more
Date: January 1, 1990
Creator: Cheng, Lap Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Continuous chemical reaction chromatography

Description: The past three years have been devoted to investigating simulated countercurrent chomatographic moving bed separators (SCMCS) and simulated countercurrent moving bed reactors (SCMCR). These are novel separators and reactors used for separation, or for carrying out a chemical reaction and separation continuously and simultaneously in fixed bed. In the SCMCR and the SCMCS the process aspects of a countercurrent moving bed, in which a stream of solids flows countercurrent to an inert fluid and pas… more
Date: January 1, 1992
Creator: Aris, R. & Carr, R.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

DEGRADED TBP SOLVENT REGENERATION TECHNOLOGY USING BUTYLAMINE AS A SOLVENT WASHING TO REDUCE SOLID SALT WASTE

Description: Normal butylamine compounds are studied as salt-free wash reagents for degraded solvent used in PUREX process in spent fuel reprocessing. The solvent wash tests were carried out with two types of butylamine compounds, n-butylamine oxalate and n-butylamine bicarbonate, by counter-current mode using a small size mixer-settler composed of two 4-stage wash steps. Di-n-butyl phosphoric acid (HDBP), the main degradation product from TBP, was removed from real degraded solvent with decontamination fac… more
Date: February 27, 2003
Creator: Asakura, T.; Itoh, Y.; Hotoku, S.; Morita, Y. & Uchiyama, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Upgrade of the DIII-D GHz ECH System to 6 MW

Description: ECH power has proven capabilities to both heat and drive current in energetic plasmas. Recent developments in high power sources have made the use of these capabilities in energetic plasmas feasible. For the second phase of ECH power on DIII-D, there will be three 1 MW sources added to the existing 3 MW for a total generated power of 6 MW. The upgrade is based on the use of single disc CVD (chemical vapor deposition) diamond windows on 1 MW gyrotrons developed by CPI. AU gyrotrons are connected… more
Date: November 1, 1999
Creator: Cary, W. P.; Callis, R. W.; Lohr, J. M.; Ponce, D. & Legg, R. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Small Scale Countercurrent Liquid-Liquid Extractor

Description: Details of design and operation are given for a laboratorysize, 20 - stage, multiple-contact, "unlimited-feed'', countercurrent-flow, liquid-liquid extractor. The apparatus consists mainly of glass parts that are joined by polyethylene tubing and are mounted in a steel cradle that can rotate on its horizontal axis. The reservoirs for feed liquids are an integral part of the assembly, and proper rotation of the assembly causes the flow of liquids to, through and from the extractor. Testing and d… more
Date: June 1, 1961
Creator: Wilhelm, H. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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