48 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Phosphates"  
Results: 1 - 24 next
open access

Assessment of U. S. domestic capacity for producing reactor-grade thorium dioxide and controlling associated wastes and effluents

Description: Demand for reactor-grade ThO/sub 2/ is likely to increase as a result of the growing interest in the application of the thorium-uranium fuel cycle to nuclear reactors. The wastes and effluents identified with the production of ThO/sub 2/ from monazite sand are waste water, tailings, dust, smoke and gas, and radionuclides (primarily, /sup 232/Th and /sup 226/Ra). There are currently an estimated 1,500 short tons of crude thorium hydroxide byproduct that can be readily converted to reactor-grade … more
Date: February 1, 1978
Creator: Enderlin, W.I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of ultrafiltration and inorganic adsorbents for reducing volumes of low-level and intermediate-level liquid waste: July--September 1977

Description: The ultrafiltration (UF) pilot system is being evaluated at Mound Facility. The effect of pressure drop, temperature, and pH of the feed on system performance has been studied. The system has been run through a number of cleaning cycles including tap water flush, enzyme soak, detergent wash, and citric acid/oxalic acid wash. A continuous run was started on waste from the Waste Processing Facility; about 11,500 gal has been processed. Studies to determine the effect of (..cap alpha.., ..beta.., … more
Date: February 9, 1978
Creator: Koenst, J. W.; Herald, W. R. & Roberts, R. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of an Effective Transport Media for Juvenile Spring Chinook Salmon to Mitigate Stress and Improve Smolt Survival During Columbia River Fish Hauling Operations, 1985 Final Report.

Description: Selected transport media consisting of mineral salt additions (Na/sup +/, Cl/sup -/, Ca/sup + +/, PO/sub 4//sup -3/, HCO/sub 3//sup -/, and Mg/sup + +/), mineral salts plus tranquilizing concentrations of tricaine methane sulfonate (MS-222), or MS-222 alone were tested for their ability to mitigate stress and increase smolt survival during single and mixed species hauling of Columbia River spring chinook salmon (Oncorhynchus tshawytscha) and steelhead trout (Salmo gairdneri). Successful stress … more
Date: February 1, 1985
Creator: Wedemeyer, Gary A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

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.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Growth of KH/sub 2/PO/sub 4/ crystals at constant temperature and supersaturation. Final report, October 20, 1980-October 20, 1981

Description: A large three-zone crystallizer system was constructed and successfully operated for growing KH/sub 2/PO/sub 4/ single crystals. Under conditions of constant crystallization temperature and supersaturation, growth rates exceding 5 mm per day were demonstrated for KH/sub 2/PO/sub 4/ crystals of 5 x 5 cm cross section. The optical quality of these crystals was equivalent to that of crystals grown at rates presently considered as state-of-the-art (approx. 1 mm/day). Sample crystals were supplied f… more
Date: February 1, 1982
Creator: Loiacono, G.M.; Zola, J. & Kostecky, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The MAP3S network data and quality control summary for 1985

Description: This report, the ninth in a series documenting results from the MAP3S Precipitation Chemistry Network, contains a statistical summary of daily precipitation chemistry data from the nine-site network in the eastern United States, both for the year 1985 alone and for the period 1977 through 1985. In addition, a report on quality control and external quality assurance activities is included, which updates the 1980 quality control report.
Date: February 1, 1988
Creator: Dana, M.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigation of methods for the selective removal and characterization of transition metals associated with solids in the marine environment

Description: The operation of an OTEC plant will result in the mixing of large volumes of seawater from different depths within the ocean. Because suspended particulate material is intimately involved in marine food webs and transition metals, such as copper, can have toxic effects, it is important to develop a sound methodology for characterizing and quantifying transition metal behavior associated with the solid material. The characterization of solid-phase-associated transition metals in the marine envir… more
Date: February 1, 1981
Creator: Van Valin, R. & Morse, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical Technology Division, Chemical Development Section C Progress Report for October-December 1961

Description: Recovery of Th (and U) from Granitic Rock. Recovery of Th by acid leaching ten addltlonal granite samples (36 to 82 ppm Th) from the Conway formation in N. H. ranged from about 50 to 85%, and averaged about 70%, Study of the effect of grind size on the recovery of Th from Conway and Plkes Peak granites showed no significant differences in the range minus 20 to minus 200 mesh. The Th concentration in a sized Conway granite sample was found to be much greater in the fine than in the coarse fracti… more
Date: February 21, 1962
Creator: Brown, K.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An aerial radiological survey of Pocatello and Soda Springs, Idaho and surrounding area, June--July 1986

Description: Three aerial radiological surveys were conducted during the period 16 June through 15 July 1986 over the towns of Pocatello, Soda Springs, and Fort Hall, Idaho and the surrounding areas. The surveys were performed for the United States Environmental Protection Agency (EPA) by the United States Department of Energy's (DOE) Remote Sensing Laboratory (RSL), utilizing the Aerial Measuring System (AMS). This work was completed in cooperation with a study by the EPA to conduct a dose assessment of hu… more
Date: February 1, 1987
Creator: Berry, H. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New harmonic materials: index engineering. Thin-thick quadrature frequency conversion

Description: The quadrature conversion scheme is a method of generating the second harmonic. The scheme, which uses two crystals in series, has several advantages over single-crystal or other two crystal schemes. The most important is that it is capable of high conversion efficiency over a large dynamic range of drive intensity and detuning angle. Consider a pair of KDP crystals cut for type-II phase matching. In the quadrature scheme, the optic axes of the crystals are arranged so that the plans containing… more
Date: February 7, 1985
Creator: Eimerl, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

An Aerosol Condensation Model for Sulfur Trioxide

Description: This document describes a model for condensation of sulfuric acid aerosol given an initial concentration and/or source of gaseous sulfur trioxide (e.g. fuming from oleum). The model includes the thermochemical effects on aerosol condensation and air parcel buoyancy. Condensation is assumed to occur heterogeneously onto a preexisting background aerosol distribution. The model development is both a revisiting of research initially presented at the Fall 2001 American Geophysical Union Meeting [1] … more
Date: February 7, 2008
Creator: Grant, K E
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Lithium Insertion Chemistry of Some Iron Vanadates

Description: Lithium insertion into various iron vanadates has been investigated. Fe{sub 2}V{sub 4}O{sub 13} and Fe{sub 4}(V{sub 2}O{sub 7}){sub 3} {center_dot} 3H{sub 2}O have discharge capacities approaching 200 mAh/g above 2.0 V vs. Li{sup +}/Li. Although the potential profiles change significantly between the first and subsequent discharges, capacity retention is unexpectedly good. Other phases, structurally related to FeVO{sub 4}, containing copper and/or sodium ions were also studied. One of these, {b… more
Date: February 2, 2007
Creator: Patoux, Sebastien & Richardson, Thomas J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Surgical Robotics Research in Cardiovascular Disease

Description: This grant is to support a research in robotics at three major medical centers: the University of Southern California-USC- (Project 1); the University of Alabama at Birmingham-UAB-(Project 2); and the Cleveland Clinic Foundation-CCF-(Project 3). Project 1 is oriented toward cardiovascular applications, while projects 2 and 3 are oriented toward neurosurgical applications. The main objective of Project 1 is to develop an approach to assist patients in maintaining a constant level of stress while… more
Date: February 29, 2008
Creator: Pohost, Gerald M; Guthrie, Barton L & Steiner, Charles
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Growth of KH/sub 2/PO/sub 4/ crystals at constant temperature and supersaturation. Final report, 20 October 1980-20 October 1981

Description: A large three-zone cyrstallizer system was constructed and successfully operated for growing KH/sub 2/PO/sub 4/ single crystals. Under conditions of constant crystallization temperature and supersaturation, growth rates exceeding 5 mm per day were demonstrated for KH/sub 2/PO/sub 4/ crystals of 5 x 5 cm cross section. The optical quality of these crystals was equivalent to that of crystals grown at rates presently considered as state-of-the-art (approx. 1 mm/day). Sample crystals were supplied … more
Date: February 1, 1982
Creator: Loiacono, G.M.; Zola, J. & Kostecky, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Surfactant-enhanced alkaline flooding with weak alkalis

Description: The objective of Project BE4B in FY90 was to develop cost-effective and efficient chemical flooding formulations using surfactant-enhanced, lower pH (weak) alkaline chemical systems. Chemical systems were studied that mitigate the deleterious effects of divalent ions. The experiments were conducted with carbonate mixtures and carbonate/phosphate mixtures of pH 10.5, where most of the phosphate ions exist as the monohydrogen phosphate species. Orthophosphate did not further reduce the deleteriou… more
Date: February 1, 1991
Creator: French, T. R. & Josephson, C. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of Tank 241-AN-106 characterization and grout performance criteria

Description: This report provides an assessment of how well we can resolve the following issues concerning Tank 241-AN-106 at the Hanford Reservation, given the current state of information: How well we can characterize the contents of 241-AN-106; whether the degree of characterization is sufficient to use 241-AN-106 wastes to develop tests of grout adequacy. The wastes must be characterized not only to ensure grout adequacy but also to provide assurance that the wastes can be successfully and safely transf… more
Date: February 1, 1993
Creator: Liebetrau, A.M. & Anderson, C.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement of trace elements in KH/sub 2/PO/sub 4/ crystals by x-ray fluorescence spectrometry

Description: A non-destructive method is described for the quantitative measurement of impurities in KDP (KH/sub 2/PO/sub 4/) crystals. Part per million concentrations of impurities can be determined with good accuracy in about one hour of instrument time. An energy dispersive x-ray spectrometer is used. Both the crystals and the solutions from which they are grown may be analyzed.
Date: February 1, 1981
Creator: Ryon, R. W. & Duewer, T. I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

New prodrugs based on phospholipid-nucleoside conjugates

Description: A method is described for the preparation of defined, isomerically pure phospholipid-nucleoside conjugates as a prodrug in which the drug (araC) is attached to the phospholipid by a monophosphate linkage. Key intermediates in the process involve selective blocking and deblocking of the nucleoside derivative. These particular monophosphate-linked derivatives represent a new class of prodrug, which are useful by themselves or in combination with diphosphate linked derivatives. Several new composi… more
Date: February 3, 1982
Creator: MacCoss, M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Variability in properties of grouted Phosphate/Sulfate N-Reactor Waste

Description: A Transportable Grout Facility (TGF) is being constructed at the Hanford site in Washington State to convert various low-level liquid wastes to a grout waste form for onsite disposal. The TGF Project is managed by Rockwell Hanford Operations (Rockwell). Oak Ridge National Laboratory (ORNL) has provided a grout formulation for Phosphate/Sulfate N-Reactor Waste, the first waste stream scheduled for grouting beginning in late 1987. The formulation includes a blend of portland cement, fly ash, atta… more
Date: February 1, 1987
Creator: Lokken, R.O.; Martin, P.F.C.; Bowen, W.M.; Harty, H. & Treat, R.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Waste minimization at Lawrence Livermore National Laboratory: A case study of environmentally conscious manufacturing

Description: The purpose of this paper is to provide an update on what we`ve accomplished and have planned in our plating operation at Lawrence Livermore National Laboratory (LLNL) in the area of waste minimization. Our efforts have included issues other than waste minimization and, therefore, fall under the wider umbrella entitled pollution prevention or environmentally conscious electroplating. Approximately one year has passed since our last report on pollution prevention and since this topic remains a h… more
Date: February 1, 1994
Creator: Steffani, C. P. & Dini, J. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Analysis of Tank 241-AN-106 characterization and grout performance criteria

Description: This report provides an assessment of how well we can resolve the following issues concerning Tank 241-AN-106 at the Hanford Reservation, given the current state of information: How well we can characterize the contents of 241-AN-106; whether the degree of characterization is sufficient to use 241-AN-106 wastes to develop tests of grout adequacy. The wastes must be characterized not only to ensure grout adequacy but also to provide assurance that the wastes can be successfully and safely transf… more
Date: February 1, 1993
Creator: Liebetrau, A. M. & Anderson, C. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low-level waste disposal - Grout issue and alternative waste form technology

Description: Based on the Record of Decision (1) for the Hanford Defense Waste Environmental Impact Statement (HDW-EIS) (2), the US Department of Energy (DOE) is planning to dispose of the low-level fraction of double-shell tank (DST) waste by solidifying the liquid waste as a cement-based grout placed in near-surface, reinforced, lined concrete vaults at the Hanford Site. In 1989, the Hanford Grout Disposal Program (HGDP) completed a full-scale demonstration campaign by successfully grouting 3,800 cubic me… more
Date: February 1, 1993
Creator: Epstein, J. L. & Westski, J. H. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Tank waste retrieval issues and options for their resolution

Description: The US Department of Energy has undertaken the significant challenge of remediating the high-level wastes currently being stored underground in tanks located at the Hanford Site in Washington State. A key element of the remediation process is the recovery of these defense production wastes in preparation for downstream processing and disposal. A number of technical and programmatic issues have been identified with the waste recovery process, referred to as retrieval. In response to these issues… more
Date: February 1, 1993
Creator: Miller, W. C.; Henderson, J. M.; Shen, E. J.; Stegen, L. C. & Wrzesinski, W. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Surface Dynamics during Environmental Degradation of Crystal Surfaces

Description: Using in situ optical microscopy and scattering measurements, we have followed the evolution of surface morphology during etching and measured surface etching rates as a function of humidity and undersaturation. From our experiments to date we have developed the following picture of etch pit formation on KDP crystal surfaces. Pit formation is characterized by a nucleation and growth process: the introduction of water creates a condition of undersaturation at the crystal surface. The equilibrium… more
Date: February 21, 2001
Creator: Whitman, P; DeYoreo, J; Land, T; Miller, E; Suratwala, T; Thorsness, C et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen