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Removing Phosphate from Hanford High-Phosphate Tank Wastes: FY 2010 Results

Description: The U.S. Department of Energy (DOE) is responsible for environmental remediation at the Hanford Site in Washington State, a former nuclear weapons production site. Retrieving, processing, immobilizing, and disposing of the 2.2 × 105 m3 of radioactive wastes stored in the Hanford underground storage tanks dominates the overall environmental remediation effort at Hanford. The cornerstone of the tank waste remediation effort is the Hanford Tank Waste Treatment and Immobilization Plant (WTP). As cu… more
Date: September 22, 2010
Creator: Lumetta, Gregg J.; Braley, Jenifer C.; Edwards, Matthew K.; Qafoku, Odeta; Felmy, Andrew R.; Carter, Jennifer C. et al.
Partner: UNT Libraries Government Documents Department
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A Synergistic Combination of Advanced Separation and Chemical Scale Inhibitor Technologies for Efficient Use of Imparied Water As Cooling Water in Coal-based Power Plants

Description: Nalco Company is partnering with Argonne National Laboratory (ANL) in this project to jointly develop advanced scale control technologies that will provide cost-effective solutions for coal-based power plants to operate recirculating cooling water systems at high cycles using impaired waters. The overall approach is to use combinations of novel membrane separations and scale inhibitor technologies that will work synergistically, with membrane separations reducing the scaling potential of the co… more
Date: August 30, 2010
Creator: Gill, Jasbir
Partner: UNT Libraries Government Documents Department
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Precipitate Formation Potential of Resin Regeneration Effluent in the 100-HR-3 Operable Unit

Description: Calculations performed as part of this study indicate that injection of treated groundwater containing treated regenerant solution has a high potential for precipitate formation that could lead to plugging of formation porosity surrounding the injection well. In the worst case scenario, substantial plugging could occur within a year of the initiation of injection. Some uncertainty is associated with respect to this conclusion. The uncertainty results from the fact that equilibrium with the most… more
Date: October 9, 2009
Creator: Cantrell, Kirk J.
Partner: UNT Libraries Government Documents Department
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Chemical Effects Head-Loss Research in Support of Generic Safety Issue 191.

Description: This summary report describes studies conducted at Argonne National Laboratory on the potential for chemical effects on head loss across sump screens. Three different buffering solutions were used for these tests: trisodium phosphate (TSP), sodium hydroxide, and sodium tetraborate. These pH control agents used following a LOCA at a nuclear power plant show various degrees of interaction with the insulating materials Cal-Sil and NUKON. Results for Cal-Sil dissolution tests in TSP solutions, sett… more
Date: October 31, 2006
Creator: Park, J. H.; Kasza, K.; Fisher, B.; Oras, J.; Natesan, K.; Shack, W. J. et al.
Partner: UNT Libraries Government Documents Department
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Determining the Structure of Biomaterials Interfaces using Synchrotron-based X-ray Diffraction

Description: The purpose of this project is to explore the feasibility of using surface X-ray diffraction (SXRD) to determine the structure of biomineral surfaces in electrolyte solutions and of the adsorbed layer of acidic amino acids that are believed to play a central role in the control of biomineral formation and function. The work is a critical component in the development of an integrated picture of the physical and chemical basis for deposition and dissolution at solid-liquid interfaces in biologica… more
Date: January 24, 2002
Creator: McBride, M
Partner: UNT Libraries Government Documents Department
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Engineering Titanium for Improved Biological Response

Description: The human body and its aggressive environment challenge the survival of implanted foreign materials. Formidable biocompatibility issues arise from biological, chemical, electrical, and tribological origins. The body's electrolytic solution provides the first point of contact with any kind of implant, and is responsible for transport, healing, integration, or attack. Therefore, determining how to successfully control the integration of a biomaterial should begin with an analysis of the early int… more
Date: January 23, 2002
Creator: Orme, C.; Bearinger, J.; Dimasi, E. & Gilbert, J.
Partner: UNT Libraries Government Documents Department
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Monte Carlo simulations of phosphate polyhedron connectivity in glasses

Description: Monte Carlo simulations of phosphate tetrahedron connectivity distributions in alkali and alkaline earth phosphate glasses are reported. By utilizing a discrete bond model, the distribution of next-nearest neighbor connectivities between phosphate polyhedron for random, alternating and clustering bonding scenarios was evaluated as a function of the relative bond energy difference. The simulated distributions are compared to experimentally observed connectivities reported for solid-state two-dim… more
Date: January 1, 2000
Creator: ALAM,TODD M.
Partner: UNT Libraries Government Documents Department
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Powder-based synthesis of nanocrystalline material components for structural application. Final report

Description: Hydroxiapate spray coatings and substrates for implant production as well as multilayered metal ceramic coatings from nanocrystalline materials are a subject of the investigation. The work aims at the improvement of quality of said objects. This study has investigated the processes of hydroxiapatite powder production. Sizes, shapes and relief of initial HA powder surface are analyzed using SEM and TEM. Modes of HA plasma spraying on a substrate from titanium and associated compositions of tradi… more
Date: December 1, 1998
Creator: Ilyuschenko, A.F.; Ivashko, V.S. & Okovity, V.A.
Partner: UNT Libraries Government Documents Department
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Prototype development and testing of ultrafine grain NZP ceramics. Final report, July 28, 1995--April 27, 1997

Description: The goal of this project was to demonstrate that a new low-expanding ceramic (Ca{sub 0.6},Mg{sub 0.4})Zr{sub 4}(PO{sub 4}){sub 6}, hereafter referred to as CMZP, could be used as an exhaust manifold liner in off-road diesel engines and provide improved engine efficiency (by permitting higher engine operating temperature). This study has successfully demonstrated this improvement and further engine testing (and possible manufacturing) is presently underway at Caterpillar Inc. Laboratories. Basic… more
Date: August 4, 1997
Creator: Brown, J. J.
Partner: UNT Libraries Government Documents Department
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Prototype development and testing of ultrafine grain NZP ceramics. Quarterly progress report {number_sign}4, January 28, 1996--April 27, 1996

Description: Caterpillar Inc. continues to develop a slip casting procedure for CMZP (CaMgZr phosphate) exhaust portliners for diesel engines. ZnO was used as additive. Tubes have been cast and fired and initial properties look excellent. 40 lbs of CMZP powder are being prepared for Caterpillar to complete the slip casting of 90 degree elbows.
Date: May 24, 1996
Creator: Brown, J. J.
Partner: UNT Libraries Government Documents Department
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Prototype development and testing of ultrafine grain NZP ceramics. Quarterly technical progress report No. 3, October 28, 1995--January 27, 1996

Description: Caterpillar has been developing advanced low-heat-rejection (LHR) engine designs because by insulating the combustion chamber components for reduced heat rejection, improved fuel economy and emission reduction can be achieved. The insulation eliminates heat loss during the closed portion of the cycle and increases the combustion temperature. Increased combustion temperatures improve emissions by reducing the amount of particulate or smoke. The higher combustion temperatures also provide additio… more
Date: February 8, 1996
Creator: Brown, J. J.
Partner: UNT Libraries Government Documents Department
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High temperature alkali corrosion of dense SiC and Si{sub 3}N{sub 4} coated with CMZP and Mg-DOPED Al{sub 2}TiO{sub 5} in coal gas. Quarterly progress report No. 6, October 1, 1995--December 31, 1995

Description: High temperature alkali corrosion has been known to cause premature failure of ceramic components used in advanced high temperature coal combustion systems such as coal gasification and clean-up, coal fired gas turbines, and high efficiency heat engines. Non-oxide ceramics, such as SiC and Si{sub 3}N{sub 4}, are applied in HITAF systems for their well-known and desirable high temperature thermal and mechanical properties. However, these materials are prone to rapid corrosion under some types of… more
Date: December 31, 1995
Creator: Yang, S. & Brown, J. J.
Partner: UNT Libraries Government Documents Department
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Effects of soluble organic complexants and their degradation products on the removal of selected radionuclides from high-level waste. Part II: Distributions of Sr, Cs, Tc, and Am onto 32 absorbers from four variations of Hanford tank 101-SY simulant solution

Description: Many of the radioactive waste storage tanks at U.S. Department of Energy facilities contain organic compounds that have been degraded by radiolysis and chemical reactions during decades of storage. In this second part of our three-part investigation of the effects of soluble organic complexants and their degradation products, we measured the sorption of strontium, cesium, technetium, and americium onto 32 absorbers that offer high sorption of these elements in the absence of organic complexants… more
Date: April 1, 1995
Creator: Marsh, S. Fredric; Svitra, Zita V. & Bowen, Scott M.
Partner: UNT Libraries Government Documents Department
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The effects of thermal cycling on the physical and mechanical properties of [NZP] ceramics

Description: The [NZP] ceramics, sodium zirconium phosphate and its crystal structure analogs, are noted for their very low thermal expansion characteristics. What has not been widely studied is the effect of thermal cycling on physical and mechanical properties. Two [NZP] compositional series were selected (Ba{sub 1+x}Zr{sub 4}P{sub 6{minus}2x}Si{sub 2x}O{sub 24} and Ca{sub 1{minus}x}Sr{sub x}Zr{sub 4}P{sub 6}O{sub 24}) that exhibit varying bulk thermal expansion from positive to negative and varying degre… more
Date: December 31, 1994
Creator: Jackson, T.B.; Limaye, S.Y. & Porter, W.D.
Partner: UNT Libraries Government Documents Department
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New ytterbium-doped apatite crystals for flexible laser design

Description: A new class of Yb-lasers is summarized in this article. The apatite family of crystals has been found to impose favorable spectroscopic and laser properties on the Yb{sup 3+} activator ion. Crystals of Yb-doped Ca{sub 5}(PO{sub 4}){sub 3}F, Sr{sub 5}(PO{sub 4}){sub 3}F, Ca{sub x}Sr{sub 5{minus}x}(PO{sub 4}){sub 3}F, and Sr{sub 5}(VO{sub 4}){sub 3}F have been grown and investigated. Several useful laser crystals have been identified which offer a variety of fundamental laser parameters for desig… more
Date: March 1, 1994
Creator: Payne, S. A.; DeLoach, L. D.; Smith, L. K.; Krupke, W. F.; Chai, B. H. T. & Loutts, G.
Partner: UNT Libraries Government Documents Department
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Lost circulation control materials. Progress report

Description: Work in FY 94 continued to investigate the use of calcium phosphate cements as lost circulation control materials for geothermal wells. The calcium phosphate cements were produced by reacting calcium aluminate cement with sodium phosphate compounds. Pumpable formulations with thickening times up to two hours at temperatures between 25 to 90{degrees}C were developed and characterized. The materials showed rapid set behaviour, early strength development, low permeability and acceptable durability… more
Date: January 1994
Creator: Allan, M. L. & Kukacka, L. E.
Partner: UNT Libraries Government Documents Department
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Kapton HN investigations

Description: Kapton HN properties and the properties of the slip additive calcium phosphate dibasic (CaHPO{sub 4}) were investigated. Impurity analyses were performed on the compound by inductively coupled plasma (ICP) and ion chromatography (IC). Other analyses on the slip additive included: processing solution -- dissolution analysis, high-explosive compatibility studies, scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), and particle size distribution. Testing and analyses were also p… more
Date: September 28, 1990
Creator: Williams, M. K.; Huelskamp, M. A.; Armstrong, K. P.; Brandon, J. L.; Lavoie, J. M. & Smith, A. E.
Partner: UNT Libraries Government Documents Department
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Investigations of several interference effects in high frequency plasmas of analytical importance

Description: Investigations of the extent to which certain inter-element or interference effects occur in a radiofrequency-excited inductively coupled plasma (ICP) are reported. Under conditions normally employed for analytical purposes, it is shown that: (a) two solute vaporization interferences often observed in flames are eliminated or reduced to negligible proportions in the plasma; (b) increasing concentrations of an easily ionizable element (Na) up to concentrations of 6900 ..mu..g/ml exerted an unusu… more
Date: February 1, 1977
Creator: Larson, G.F.
Partner: UNT Libraries Government Documents Department
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Study of the reaction of uranium and plutonium with bone char

Description: A study of the reaction of plutonium with a commercial bone char indicates that this bone char has a high capacity for removing plutonium from aqueous wastes. The adsorption of plutonium by bone char is pH dependent, and for plutonium(IV) polymer appears to be maximized near pH 7.3 for plutonium concentrations typical of some waste streams. Adsorption is affected by dissolved salts, especially calcium and phosphate salts. Freundlich isotherms representing the adsorption of uranium and plutonium… more
Date: January 17, 1977
Creator: Silver, G. L. & Koenst, J. W.
Partner: UNT Libraries Government Documents Department
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Radiometric Methods for the Determination of Magnesium and Calcium in Portland Cement

Description: Radiometric methods of analysis for magnesium and calcium have been developed as part of a program for the U. S. Atomic Energy Commission. Office of Isotopes Development, which are applicable to the determination of these elements in portland cement Both methods employ, as a precipitant, a standard solution of (NH/sub 4/)/sub 2/HPO/sub 4/ labeled with phosphorus-32. In the presence of NH/ sub 4/OH, this reagent precipitate; MgNH/sub 4/PO/sub 4/ or Ca/sub 3/(PO/sub 4/)/ sub 2/ from a solution of… more
Date: February 18, 1960
Creator: Brown, C. T.; Howes, J. E., Jr.; Elleman, T. S.; Townley, C. W. & Sunderman, D.N.
Partner: UNT Libraries Government Documents Department
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