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CsAlSi/sub 5/O/sub 12/: a possible host for /sup 137/Cs immobilization

Description: CsAlSi/sub 5/O/sub 12/ exhibits more acid resistance than pollucite (CsAlSi/sub 2/O/sub 6/). At pH values of 1.02 and 1.40, the extraction of Cs from CsAlSi/sub 5/O/sub 12/ at 25/sup 0/C was approximately proportional to the square root of leach time. The Cs extraction at 25/sup 0/C varied as (H/sup +/)/sup 0/ /sup 36/ over the pH range of 1 to 6. Also, the Cs extraction in various brines at 300/sup 0/C/30 MPa was comparable with that for pollucite. CsAlSi/sub 5/O/sub 12/ can be crystallized at… more
Date: March 31, 1982
Creator: Adl, T. & Vance, E.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FRACTIONAL CRYSTALLIZATION FEED ENVELOPE

Description: Laboratory work was completed on a set of evaporation tests designed to establish a feed envelope for the fractional crystallization process. The feed envelope defines chemical concentration limits within which the process can be operated successfully. All 38 runs in the half-factorial design matrix were completed successfully, based on the qualitative definition of success. There is no feed composition likely to be derived from saltcake dissolution that would cause the fractional crystallizati… more
Date: March 19, 2008
Creator: DL, HERTING
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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SB5 WITH THE ESTIMATED IMPACT OF LOW TEMPERATURE ALUMINUM DISSOLUTION: PRELIMINARY FRITS FOR MELT RATE TESTING

Description: Composition projections for Sludge Batch 5 (SB5) were developed to evaluate possible impacts of the Al-dissolution process on the availability of viable frit compositions for vitrification at the DWPF. The study included two projected SB5 compositions that bound potential outcomes (or degrees of effectiveness) of the Al-dissolution process, as well as a nominal SB5 composition projection based on the results of the recent Al-dissolution demonstration at SRNL. A Nominal Stage assessment was used… more
Date: March 11, 2008
Creator: Fox, K & Tommy Edwards, T
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Results of Deposition Scoping Tests

Description: The processes of crystallization and solid deposit formation that led to the shutdown of the 2H evaporator operation at the Savannah River Site (SRS) and that could possibly cause similar problems in the future or in other evaporators need to be better understood. Through experimentation, thermodynamic modeling, and correlation of scaling to historical tank farm operations, progress has been made in developing guidelines as to the concentrations of silicon and aluminum that can be processed by … more
Date: March 4, 2003
Creator: Hu, M.Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Stability of multilayers for short-wavelength optics

Description: A variety of multilayer mirrors with transition metal absorber layers (W-C, Wre-C, Co-C, and Cr-C) have been fabricated and tested up to 1000 C using standard 0.20 x-ray diffraction, Debye-Scherrer scattering and microcleavage transmission electron microscopy. The 0-20 x-ray diffraction during annealing shows the Bragg peak position to shift toward lower angles with increasing temperature. This irreversible shift starts at around 300 C and is equivalent to as much as 12% expansion of the multil… more
Date: March 1, 1986
Creator: Ziegler, E.; Lepetre, Y.; Schuller, I.K.; Viccaro, P.J. & Spiller, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Multiflash feed-and-bleed coupling for the evaporation and crystallization industry. Technical report, January 1-March 31, 1977

Description: The following are discussed: each of the three candidate industries (preserved fruits and vegetables, sugar and confectionary products, and chemicals) and how they were chosen; other industries that might use geothermal brine in their evaporation/crystallization operations; contacts made with people in these industries, and with manufacturers of evaporators and crystallizers; modifications made in the evaporator heat and material balance computer program; and work being done on well/pipeline ec… more
Date: March 31, 1977
Creator: Basuino, D. J.; Doyle, P. T. & May, S. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Novel Thin-Film CuInSe Sub 2 Fabrication

Description: This report describes research in Rapid Thermal Processing (RTP), a process that allows the formation of CuInSe{sub 2} without the use of H{sub 2}Se. RTP is a well-established method of rapidly achieving temperatures necessary to melt and recrystallize materials such as Si and and silicides. RTP processes can rapidly and uniformly heat large surface areas to hundreds of degrees Celsius. RTP is the most promising method of rapid recrystallization studied to date, being readily scalable from the … more
Date: March 1, 1992
Creator: Mooney, G.D. & Hermann, A.M. (Colorado Univ., Boulder, CO (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Quaternary rhyolite from the Mineral Mountains, Utah, USA. Final report, Volume 77-10

Description: A suite of silicic volcanic rocks is associated with the Roosevelt Hot Springs geothermal area in southwestern Utah. The volcanic sequence includes Tertiary rhyolite 8 My old and obsidian, ash and rhyolite of Quaternary age. The Quaternary lavas are characterized by high silica content (76.5% Si0/sub 2/) and total alkalies in excess of 9 percent. Obsidians commonly contain greater amounts of fluorine than water. Two older flows (0.8 My) can be distinguished from younger dome and pyroclastic mat… more
Date: March 1, 1978
Creator: Evans, S. H., Jr. & Nash, W. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Durability of simulated DWPF annealed glasses

Description: Simulated high-level waste glass samples of the DWPF projected compositions were annealed at various times and temperatures in order to develop time-temperature-transformation diagrams. These heat treated glasses were subjected to the Product Consistency Test (PCT) to evaluate glass durability. The B, Li, and Na concentrations in the leachate (the PCT results) were compared to the PCT results of the Environmental Assessment benchmark glass. Durability as a function of glass composition and crys… more
Date: March 1, 1993
Creator: Andrews, M. K.; Cicero, C. A.; Marra, S. L. & Beam, D. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Devitrification behavior in a zinc borosilicate nuclear waste glass

Description: Experimental studies of thermally induced changes in a simulated nuclear waste glass were conducted to define the composition and concentration of all phases formed over a broad range of time (up to one year) and temperature (<1200/sup 0/C) conditions. Depending on time and temperature, a steady-state condition is achieved in which a number of crystalline phases coexist with a glass phase which is partially depleted of some elements. Concentrations of the phases increase with decreasing tempera… more
Date: March 1, 1978
Creator: Turcotte, R. P. & Wald, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Time- temperature- transformation- diagrams for DWPF projected glass compositions

Description: The Department of Energy`s Waste Acceptance Product Specifications (WAPS) require that time-temperature-transformation diagrams be developed for each of the DWPF high-level waste glass compositions. This information will be useful in understanding the crystallization behavior during melter idling, accident scenarios, and storage. Simulated high level waste glass samples were annealed at temperatures varying from 400-1100{degrees}C for times varying from 45 minutes to 32 days. The glasses were c… more
Date: March 1, 1993
Creator: Marra, S. L.; Andrews, M. K. & Cicero, C. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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[Passamaquoddy Technology Recovery Scrubber{trademark}, March 1992]

Description: The Passamaquoddy Technology Recovery Scrubber{trademark} has been built and is being demonstrated on-line at the Dragon Products Plant in Thomaston, Maine. This Innovative Clean Coal Technology is using waste cement kiln dust (CKD) to scrub sulfur dioxide, some NO{sub x}, as well as a small amount of carbon dioxide from a coal burning kiln exhaust flue gas. The process also enables the cement plant to reuse the treated CKD, eliminating the need to landfill this material. Potassium, the offendi… more
Date: March 3, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High-Resolution Spore Coat Architecture and Assembly of Bacillus Spores

Description: Elucidating the molecular architecture of bacterial and cellular surfaces and its structural dynamics is essential to understanding mechanisms of pathogenesis, immune response, physicochemical interactions, environmental resistance, and provide the means for identifying spore formulation and processing attributes. I will discuss the application of in vitro atomic force microscopy (AFM) for studies of high-resolution coat architecture and assembly of several Bacillus spore species. We have demon… more
Date: March 14, 2011
Creator: Malkin, A J; Elhadj, S & Plomp, M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Towards Understanding the Mechanism of PETN Coarsening

Description: The long-term goal is to determine the mechanism of PETN crystallization and coarsening at the solid-vapor interface and to quantify the thermodynamic and kinetic parameters that control those processes. We achieve this goal by investigating the surface evolution of synthetic PETN single crystals using in situ atomic force microscopy (AFM) at various temperatures.
Date: March 23, 2005
Creator: Qiu, R.; Overturf, G.; Gee, R.; Burnham, A.; Weeks, B. & De Yoreo, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Rapid Laser Induced Crystallization of Amorphous NiTi Films Observed by Nanosecond Dynamic Transmission Electron Microscopy (DTEM)

Description: The crystallization processes of the as-deposited, amorphous NiTi thin films have been studied in detail using techniques such as differential scanning calorimetry and, in-situ TEM. The kinetic data have been analyzed in terms of Johnson-Mehl-Avrami-Kolomogrov (JMAK) semi-empirical formula. The kinetic parameters determined from this analysis have been useful in defining process control parameters for tailoring microstructural features and shape memory properties. Due to the commercial push to … more
Date: March 1, 2010
Creator: LaGrange, T; Campbell, G H; Browning, N D; Reed, B W & Grummon, D S
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nitrogen effects on crystallization kinetics of amorphous TiOxNy thin films

Description: The crystallization behavior of amorphous TiOxNy (x&gt;&gt;y) thin films was investigated by in-situ transmission electron microscopy. The Johnson-Mehl-Avrami-Kozolog (JMAK) theory is used to determine the Avrami exponent, activation energy, and the phase velocity pre-exponent. Addition of nitrogen inhibits diffusion, increasing the nucleation temperature, while decreasing the growth activation energy. Kinetic variables extracted from individual crystallites are compared to JMAK analysis of the… more
Date: March 30, 2001
Creator: Hukari, Kyle; Dannenberg, Rand & Stach, E.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Chemistry, Crystallization, Physicochemical Properties and Behavior of Sodium Aluminosilicate Solid Phases: Final Report

Description: The synthesis of sodium aluminosilicate solids phases precipitated from NO{sub 2}/NO{sub 3}-free and NO{sub 2}/NO{sub 3}-rich liquors has been performed. Four sodium aluminosilicate precipitation products were formed. These are (1) X-ray/electron diffraction-indifferent amorphous phase; (2) crystalline zeolite A; (3)NO{sub 2}/NO{sub 3}-rich crystalline sodalite; and (4) NO{sub 2}/NO{sub 3}-rich crystalline cancrinite phase. Characterization of the physicochemical properties for these phases has… more
Date: March 12, 2003
Creator: Rosencrance, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Observation of an elementary cuboctahedron of Xe nanocrystal in an Al matrix.

Description: When a noble gas element such as Xe is implanted in an fcc metal matrix such as Al at room temperature, a fine dispersion of precipitates forms. The precipitates are elementary fcc crystals up to diameters of several nanometers (for Xe in Al, 8-10 rim), above which they are non-crystalline. The precipitates exhibit a cube-on-cube orientation relation with the matrices and have lattice parameters which are much larger than those of the matrices (a{sub Xe} = 1.5a{sub Al}). Thus the interphase int… more
Date: March 10, 1999
Creator: Allen, C. W.; Birtcher, R. C.; Donnelly, S. E.; Furuya, K.; Ryan, E. A. & Song, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Behavior of nanocrystalline Xe precipitates in Al under 1 MeV electron irradiation.

Description: Crystalline nanoprecipitates of Xe have been produced by ion implantation into high purity Al at 300 K. With an off-zone axis TEM imaging technique, the nanocrystals may be clearly structure imaged against a nearly featureless background. Under the 1 MeV electron irradiation employed for the HREM observation, Xe nanocrystals exhibit a number of readily observed physical phenomena including migration within the matrix, changes in shape, faulting, melting, crystallization and coalescence. The var… more
Date: March 10, 1999
Creator: Allen, C. W.; Birtcher, R. C.; Donnelly, S. E.; Furuya, K.; Mitsuishi, K. & Song, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SOME OBSERVATIONS REGARDING RARE-EARTH LACTATES

Description: Lactates of all the rare earths except lanthanum, cerium, and praseodymium were prepared and studied. In the case of lanthanum, cerium, and praseodymium the laciates are apparently so soluble that they cannot be crystallized directly from aqueous solution. Products obtained by addition of anhydrous ethanol to sirupy solutions of the iight-rare-earth lactates were not well characterized and were deliquescent. Neodymium lactate trinydrate was prepared only by the addition of alcohol to a sirupy s… more
Date: March 28, 1962
Creator: Powell, J.E. & Farrell, J.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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LITHOSTRATIGRAPHY AND SHEAR-WAVE VELOCITY IN THE CRYSTALLIZED TOPOPAH SPRING TUFF, YUCCA MOUNTAIN, NEVADA

Description: Evaluation of the seismic response of the proposed spent nuclear fuel and high-level radioactive waste repository at Yucca Mountain, Nevada, is in part based on the seismic properties of the host rock, the 12.8-million-year-old Topopah Spring Tuff. Because of the processes that formed the tuff, the densely welded and crystallized part has three lithophysal and three nonlithophysal zones, and each zone has characteristic variations in lithostratigraphic features and structures of the rocks. Lith… more
Date: March 20, 2006
Creator: Buesch, David; Stokoe, Kenneth H. & Schuhen, Michael
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of processing conditions on the reliability of cross-linked polyethylene cable insulation. Progress report

Description: Crystallization and morphology were investigated in cross-linked PE. /sup 13/C NMR was used to quantify the cross-links. Production of cable is being studied. Dielectric constant and loss of cross-linked PE are being measured. (DLC)
Date: March 1, 1981
Creator: Phillips, P.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

(Passamaquoddy Technology Recovery Scrubber trademark , March 1992)

Description: The Passamaquoddy Technology Recovery Scrubber{trademark} has been built and is being demonstrated on-line at the Dragon Products Plant in Thomaston, Maine. This Innovative Clean Coal Technology is using waste cement kiln dust (CKD) to scrub sulfur dioxide, some NO{sub x}, as well as a small amount of carbon dioxide from a coal burning kiln exhaust flue gas. The process also enables the cement plant to reuse the treated CKD, eliminating the need to landfill this material. Potassium, the offendi… more
Date: March 3, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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