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NCAW feed chemistry: Effect of starting chemistry on melter offgas and iron redox

Description: The Pacific Northwest Laboratory (PNL) Vitrification Technology Development (PVTD) program has been established to develop technology to support immobilization of selected Hanford wastes. The effort of the PVTD program is directed by the U.S. Department of Energy (DOE). This report is part of the effort and focuses on the effect of starting waste chemistry on the vitrification process. The objective of the investigation was the evaluation of the effect of starting chemistry on the cold cap beha… more
Date: March 1, 1995
Creator: Smith, P.A.; Vienna, J.D. & Merz, M.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Geology, hydrology, chemistry, and microbiology of the in situ bioremediation demonstration site

Description: This report summarizes characterization information on the geology, hydrology, microbiology, contaminant distribution, and ground-water chemistry to support demonstration of in situ bioremediation at the Hanford Site. The purpose of this information is to provide baseline conditions, including a conceptual model of the aquifer being utilized for in situ bioremediation. Data were collected from sampling and other characterization activities associated with three wells drilled in the upper part o… more
Date: March 1, 1995
Creator: Newcomer, D. R.; Doremus, L. A.; Hall, S. H.; Truex, M. J.; Vermeul, V. R. & Engelman, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Sludge pretreatment chemistry evaluation: Enhanced sludge washing separation factors

Description: This report presents the work conducted in Fiscal Year 1994 by the Sludge Pretreatment Chemistry Evaluation Subtask for the Tank Waste Remediation System (TWRS) Tank Waste Treatment Science Task. The main purpose of this task, is to provide the technical basis and scientific understanding to support TWRS baseline decisions and actions, such as the development of an enhanced sludge washing process to reduce the volume of waste that will require high-level waste (HLW) vitrification. One objective… more
Date: March 1, 1995
Creator: Colton, N.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Inorganic soil and groundwater chemistry near Paducah Gaseous Diffusion Plant, Paducah, Kentucky

Description: Near-surface soils, boreholes, and sediments near the Paducah Gaseous Diffusion Plant (PGDP) were sampled in 1989-91 as were monitoring wells, TVA wells, and privately-owned wells. Most wells were sampled two or three times. The resulting chemical analyses have been published in previous reports and have been previously described (CH2M HILL 1991, 1992; Clausen et al. 1992). The two reports by CH2M HILL are controversial, however, because, the concentrations of some constituents were reported to… more
Date: March 1, 1995
Creator: Moore, G.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Evaluation of HWVP feed preparation chemistry for an NCAW simulant -- Fiscal year 1993: Effect of noble metals concentration on offgas generation and ammonia formation

Description: The High-Level Waste Vitrification Program is developing technology for the Department of Energy to immobilize high-level and transuranic wastes as glass for permanent disposal. Pacific Northwest Laboratory (PNL) is conducting laboratory-scale melter feed preparation studies using a HWVP simulated waste slurry, Neutralized Current Acid Waste (NCAW). A FY 1993 laboratory-scale study focused on the effects of noble metals (Pd, Rh, and Ru) on feed preparation offgas generation and NH{sub 3} produc… more
Date: March 1, 1995
Creator: Patello, G. K.; Wiemers, K. D.; Bell, R. D.; Smith, H. D.; Williford, R. E. & Clemmer, R. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Numerical study of ethylene and acetylene laminar flame speeds

Description: Detailed chemical kinetic computations for ethylene-air and acetylene-air mixtures have been performed to simulate laminar flame speeds. Sensitivity analysis was applied to determine those reactions which strongly influence flame propagation. In ethylene-air mixtures, the C{sub 2}H{sub 3} + O{sub 2} = CH{sub 2}CHO + O reaction was one of the most sensitive reactions in the C{sub 2}H{sub 4}/C{sub 2}H{sub 3} submechanism and therefore this reaction was very important to ethylene flame propagation… more
Date: March 1, 1995
Creator: Marinov, N.M.; Pitz, W.J. & Westbrook, C.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A simple liquid detector for radiopharmaceutical processing systems

Description: Sensing the presence of liquids in tubing and vessels in radiochemical processing equipment provides information important to the remote or automatic control of the production of clinical doses of radiopharmaceuticals. Although modern commercial automated radiopharmaceutical synthesis machines do not usually include liquid presence as a measured process variable, earlier more complex automated synthesis devices did; and the inclusion of such feedback can increase system reliability and simplify… more
Date: March 1, 1995
Creator: Alexoff, D. L.; Hallaba, K.; Schlyer, D. & Ferrieri, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Photolytic destruction of oxalate in aqueous mixed waste

Description: In aqueous plutonium processing, residual oxalic acid can be destroyed (oxalate kill) by UV light with hydrogen peroxide (H{sub 2}O{sub 2}) in 1 M HCl solutions. By controlling the amount of H{sub 2}O{sub 2}, the oxalate kill process will not affect the chloride concentration. In nitric acid solutions, UV light alone can destroy the oxalic acid. However, with H{sub 2}O{sub 2}, the rate of destruction is faster. After the destruction of oxalic acid, the acidic solutions may be reusable without f… more
Date: March 1, 1995
Creator: Wang, F. T. & Lum, B. Y.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurements of daytime and upper tropospheric water vapor profiles by Raman lidar

Description: One of the most important atmospheric constituents needed for climate and meteorological studies is water vapor. Water vapor plays an important role in driving atmospheric circulations through latent heat release and in determining the earth`s radiation budget, both through its radiative effects (water vapor is the major greenhouse gas) and cloud formation. The vertical distribution of water vapor is particularly important because it not only determines convective stability but radiative effect… more
Date: March 1, 1995
Creator: Bisson, Scott E. & Goldsmith, J. E. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Vapor-liquid equilibria for copolymer+solvent systems: Effect of intramolecular repulsion

Description: Role of intramolecular interactions in blend miscibility is well documented for polymer+copolymer mixtures. Some copolymer+polymer mixtures are miscible although their corresponding homopolymers are not miscible; for example, over a range of acrylonitrile content, styrene/acrylonitrile copolymers are miscible with poly(methyl methacrylate) but neither polystyrene nor polyacrylonitrile is miscible with poly(methyl methacrylate). Similarly, over a composition range, butadiene/acrylonitrile copoly… more
Date: March 1, 1995
Creator: Gupta, R.B. & Prausnitz, J.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Detailed and global chemical kinetics model for hydrogen

Description: Detailed and global chemical kinetic computations for hydrogen-air mixtures have been performed to describe flame propagation, flame structure and ignition phenomena. Simulations of laminar flame speeds, flame compositions and shock tube ignition delay times have been successfully performed. Sensitivity analysis was applied to determine the governing rate-controlling reactions for the experimental data sets examined. In the flame propagation and structure studies, the reactions, OH + H{sub 2} =… more
Date: March 1, 1995
Creator: Marinov, N.M.; Westbrook, C.K. & Pitz, W.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laboratory evaluation of the potential for in situ treatment of chromate-contaminated groundwater by chemical precipitation

Description: The objective of this paper is to present the results of a series of small-scale batch tests performed to assess the effectiveness of chemical precipitation in the remediation of chromate-contaminated groundwater. These tests involved treatment of chromate solutions with ferrous and sulfide ions. In addition, tests were conducted that involved treatment of mixtures of chromate-contaminated groundwater and uncontaminated soil with the ferrous ion. A combination of ferrous sulfate and sodium sulf… more
Date: March 1, 1995
Creator: Thornton, E. C.; Beck, M. A. & Jurgensmeier, C. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nonlinear optical microscopy for imaging thin films and surfaces

Description: We have used the inherent surface sensitivity of second harmonic generation to develop an instrument for nonlinear optical microscopy of surfaces and interfaces. We have demonstrated the use of several nonlinear optical responses for imaging thin films. The second harmonic response of a thin film of C{sub 60} has been used to image patterned films. Two photon absorption light induced fluorescence has been used to image patterned thin films of Rhodamine 6G. Applications of nonlinear optical micr… more
Date: March 1, 1995
Creator: Smilowitz, L. B.; McBranch, D. W. & Robinson, J. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A multi-channel monolithic Ge detector system for fluorescence x-ray absorption spectroscopy

Description: Construction and performance of a monolithic quad-pixel Ge detector for fluorescence x-ray absorption spectroscopy (XAS) at synchrotron radiation sources are described. The detector semiconductor element has an active surface area of 4.0 cm{sup 2} which is electrically separated into four 1.0 cm{sup 2} pixels, with little interfacial dead volume. Spatial response of the array shows that cross-talk between adjacent pixels is < 10% for 5.9 keV photons that fall within 0.5 mm of the pixel boundari… more
Date: March 1, 1995
Creator: Bucher, J. J.; Allen, P. G.; Edelstein, N. M.; Shuh, D. K.; Madden, N. W.; Cork, C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Concrete sample point: 304 Concretion Facility

Description: This report contains information concerning the analysis of concretes for volatile organic compounds. Included are the raw data for these analysis and the quality control data, the standards data, and all of the accompanying chains-of-custody records and requests for special analysis.
Date: March 10, 1995
Creator: Rollison, M.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation on the use of cerium in the NBL Titrimetric Method

Description: An alternative to potassium dichromate as titrant in the New Brunswick Laboratory Titrimetric Method for uranium analysis was sought since chromium in the waste makes disposal difficult. Substitution of a ceric-based titrant was statistically evaluated. Analysis of the data indicated statistically equivalent precisions for the two methods, but a significant overall bias of +0.035% for the ceric titrant procedure. The cause of the bias was investigated, alterations to the procedure were made, an… more
Date: March 1, 1995
Creator: Zebrowski, J. P.; Orlowicz, G. J.; Johnson, K. D.; Smith, M. M. & Soriano, M. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reduction of radioactivity in oils prior to PCB analysis: A new use for solid phase extraction cartridges

Description: Radioactively contaminated oils represent a significant waste problem throughout the Department of Energy complex (DOE). From contaminated oils in glove box facilities at Los Alamos National Laboratory (LANL) through the 1200 kg of oil waste at Paducah to an estimated 46,000 kg of contaminated oily water at Lawrence Livermore, contaminated oil exists at all of the DOE facilities. Dilution is the primary mechanism for reducing the radionuclides to safe handling levels prior to analysis. However,… more
Date: March 1995
Creator: Monagle, M.; Hakonson, K. M. & Roberts, J. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Metal-metal multiply bonded complexes of technetium. Final report

Description: The primary objective of this project was to explore and develop the area of technetium metal-metal multiple bond chemistry. At the outset of the project, examples of metal-metal multiply bonded complexes of technetium were primarily limited to those supported by halide and carboxylate ligands. As a result, we intended to significantly expand the number of complexes containing Tc-Tc multiple bonds using ligands other than carboxylates or halides. In order to achieve this goal, the results obtai… more
Date: March 30, 1995
Creator: Cotton, F. A. & Haefner, S. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fundamental studies of the mechanism of catalytic reactions with catalysts effective in the gasification of carbon solids and the oxidative coupling of methane. Quarterly report, January 1, 1995--March 31, 1995

Description: The synthesis of ethane and ethylene from methane and oxygen will be carried out in novel hydrogen transport inorganic membranes and in cyclic reactors in order to prevent undesirable secondary reactions of C{sub 2} molecules to CO and CO{sub 2}. Neither inorganic membrane reactors nor cyclic tubular reactors are presently used in commercial processes. Their application to catalytic reactions represents a novel application of engineering and solid-state chemistry concepts to catalytic reactions… more
Date: March 1, 1995
Creator: Iglesia, E.; Perry, D.L. & Heinemann, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Sampling and Analysis Plan for PUREX canyon vessel flushing

Description: A sampling and analysis plan is necessary to provide direction for the sampling and analytical activities determined by the data quality objectives. This document defines the sampling and analysis necessary to support the deactivation of the Plutonium-Uranium Extraction (PUREX) facility vessels that are regulated pursuant to Washington Administrative Code 173-303.
Date: March 1, 1995
Creator: Villalobos, C.N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermal sampling head and system for concrete walls

Description: We have determined that the thermal sampling approach gives more accurate results of analyte levels on concrete surfaces when compared to the standard wipe test methods. The use of a quick-look detector eliminates the need to analyze ``clean`` environmental samples. The sorption tubes have been shown to provide a reliable quantitative means for transfer of analyte to an automated thermal desorption interface to a GC. We will be extending our work to include sampling of steel surfaces in Phase I… more
Date: March 1, 1995
Creator: Barren, E.; Berdahl, D.R.; Dorn, S.B.; Feldman, S.F.; Ortiz, A.L. Jr.; Penny, C.M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Surfactant loss control in chemical flooding: Spectroscopic and calorimetric study of adsorption and precipitation on reservoir minerals. Quarterly technical progress report. October 1, 1994--December 31, 1994

Description: The aim of this research is to elucidate the mechanisms underling adsorption and surface precipitation of flooding surfactants on reservoir minerals. The adsorption and desorption behaviors of tetradecyltrimethyl ammonium chloride (TTAC) and pentadecylethoxylated nonylphenol (NP-15) mixtures as reported earlier were rather complex and to better understand the interactions involved fluorescence spectroscopy and ultrafiltration were used during this report period to probe the microstructure of th… more
Date: March 1, 1995
Creator: Somasundaran, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A thermodynamical formulation for chemically active multi-phase turbulent flows

Description: A generalized thermodynamics for chemically active multiphase solid-fluid mixtures in turbulent state of motion is formulated. The global equations of balance for each phase are ensemble averaged and the local conservation laws for the mean motions are derived. The averaged and the local conservation laws for the mean motions are derived. The averaged form of the Clausius-Duhem inequality is used and the thermodynamics of the chemically active mixtures in turbulent motion is studied. Particular… more
Date: March 1, 1995
Creator: Ahmadi, G. & Cao, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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