31 Matching Results

Search Results

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

THE FABRICATION AND IRRADIATION TESTING OF DISPERSION-TYPE BeO-UO$sub 2$ CERAMIC FUEL MATERIALS

Description: Considerations affecting the design of dispersion-type ceramic fuel materials are discussed. The results of measurements made to study the effect of fuel loading on the properties of the fuel bodies and the results of irradiation tests of fuel pellets composed of 20 vol% UO/sub 2/ dispersed in BeO are presented. Experience in the fabrication of dispersion-type BeO --UO/sub 2/ ceramic fuel materials is described. From the results obtained, it is believed that BeO --UO/sub 2/ fuel materials of th… more
Date: October 10, 1962
Creator: Johnson, D. E. & Lofftus, F. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Americium purification by a combined anion exchange and bidentate organophosphorus solvent extraction process. [Patent application]

Description: Americium is separated from mixtures containing plutonium, other actinides, and other non-lanthamide impurities, by a combined process of anion exchange resin sorption to remove plutonium, and a bidentate organophosphorus solvent extraction of americium of the anion exchange resin effluent. Dihexyl-N,N-diethylcarbamylmethylenephosphonate is a preferred solvent. The initial mixture may be subjected to a cation exchange operation to remove monovalent impurities. The process is especially effectiv… more
Date: April 10, 1981
Creator: Navratil, J.D. & Martella, L.L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Development of improved iron Fischer-Tropsch catalysts

Description: The objective of proposed research is development of catalysts with enhanced slurry phase activity and better selectivity to fuel range products, through a more detailed understanding and systematic studies of the effects of pretreatment procedures and promoters/binders (silica) on catalyst performance.
Date: January 10, 1992
Creator: Bukur, D.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synergistic capture mechanisms for alkali and sulfur species from combustion

Description: An aerosol reactor system has been designed and constructed for the systematic study of the mechanisms governing the possible synergistic capture of sulfur oxide and alkalis with aluminosilicates and lime (CaO). Actual particle dynamics found in coal combustor systems can be simulated, mass balances can be closed, and the system conditions are well controlled. The collection of hot reactive aerosol flows is performed utilizing an isokinetic probe.
Date: January 10, 1992
Creator: Peterson, T.W.; Shadman, F.; Wendt, J.O.L. & Olsen, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Actinide removal from aqueous solution with activated magnetite

Description: An actinide aqueous waste treatment process using activated magnetite has been developed at Rocky Flats. The use and effectiveness of various magnetites in lowering actinide concentrations in aqueous solution are described. Experiments indicate that magnetite particle size and pretreatment (activation of the magnetite surface with hydroxyl ions greatly influence the effective use of magnetite as an actinide adsorbent. With respect to actinide removal, Ba(OH)/sub 2/-activated magnetite was more … more
Date: August 10, 1987
Creator: Kochen, R.L. & Thomas, R.L. (ed.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanistic studies on reactivities of organometallic macrocyclic complexes of chromium and cobalt

Description: Reaction pathways leading to the formation and cleavage of a transition metal-carbon bond at various oxidation states of the metal occupy a central position in understanding many enzymatic reactions and designing catalysts. The report is divided into six parts that (1) focus on the homolysis vs heterolysis of a C-Cr(III) bond, (2) describes a unique chain reaction and a S{sub E}2 reaction I{sub 2} and RCrL{sup 2+}, (3) concerns the oxidation of organochromium(III) complexes by dihalide and pseu… more
Date: December 10, 1990
Creator: Shi, Shu.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Computer simulation of temperature-dependent equilibrium precipitation

Description: The EQ3/EQ6 software package contains two computer codes (EQ3 and EQ6) and data files which form a useful tool in modeling precipitation from geothermal fluids caused by heating or cooling. The data files contain information on 140 aqueous species and nearly 150 minerals, and permit calculations over the temperature interval 0 to 350/sup 0/C. Assumption of homogeneous thermodynamic equilibrium in aqueous solution permits calculation of the driving forces for precipitation as measured by the aff… more
Date: July 10, 1979
Creator: Wolery, T.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Indirect fluorometric detection techniques on thin layer chromatography and effect of ultrasound on gel electrophoresis

Description: Thin-layer chromatography (TLC) is a broadly applicable separation technique. It offers many advantages over high performance liquid chromatography (HPLC), such as easily adapted for two-dimensional separation, for whole-column'' detection and for handling multiple samples, etc. However, due to its draggy development of detection techniques comparing with HPLC, TLC has not received the attention it deserves. Therefore, exploring new detection techniques is very important to the development of T… more
Date: December 10, 1990
Creator: Yinfa, Ma.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Field demonstration of the conventional steam-drive process with ancillary materials. Quarterly report No. 1, October 1, 1979-December 31, 1979

Description: The objective of this contract is to field test the potential of chemical blocking foams to increase the efficiency of steam drive operations, particularly in shallow, heavy oil reservoirs. The initial work under the contract has consisted of laboratory work to test foaming materials. The state-of-the art was surveyed through a review of current work and through meetings held with university and industry laboratories. Discussed was equipment, data, and agents in the generation and evaluation of… more
Date: January 10, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Low-density, salt-loaded foams. [RbF]

Description: An experiment was conducted at LLL that required low-density, fine-celled foams uniformly loaded with rubidium. Foams meeting these requirements were produced by impregnating foams made from polyacrylonitrile with rubidium fluoride. Foams with densities from 0.025 to 0.4 g/cm/sup 3/ were prepared and loaded with 0.002 to 0.20 g/cm/sup 3/ of rubidium fluoride.
Date: January 10, 1979
Creator: Rinde, J.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radioactive contamination in the environs of the Hanford Works for the period July, August, September 1948

Description: This report summarizes the radioactive contamination measured at the Hanford Works and vicinity for the quarter July, August, and September 1948. Topics discussed are: meteorology; airborne contamination and contamination of the Columbia River; vegetation; drinking water; and in Hanford Wastes.
Date: March 10, 1949
Creator: Singlevich, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Roles of additives and surface control in slurry atomization

Description: Airblast atomization of micronized coal water slurry is carried out using twin-fluid jet atomizers of various distributor designs. Drop size and size distribution are measured using the laser diffraction technique. We found that the atomized drop sizes of micronized coal water slurries substantially decrease as the atomizing air pressure exceeds a threshold value. We also found that the atomized drop size, represented by the mass median diameter (MMD) can be described by the wave mechanism-base… more
Date: July 10, 1990
Creator: Tsai, S.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Quality engineering and control semiannual progress report, November--December 1977 and January--April 1978

Description: Determination of ppM concentrations of dibutyl phosphate in aqueous solutions of nitric acid or sodium carbonate is possible after an extraction step with carbon tetrachloride. Ester cleavage of the fatty triglyceride constituents is the principal radiolytic reaction in irradiation of a dolphin-head oil base precision watch oil. Use of a special container and a vacuum-brazing furnace permits the high-temperature dynamic determination of volatile surface contamination from samples of large geome… more
Date: October 10, 1978
Creator: Carpenter, R.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Estimation of aerosol plutonium transport by the dust-flux method: a perspective on application of detailed data

Description: Two methods of dust-flux measurements are discussed which have been utilized to estimate aerosol plutonium deposition and resuspension. In previous studies the methods were found to be sufficiently detailed to permit parameterization of dust-flux to the erodibility of the soil, and a seventh-power dependency of dust-flux (or plutonium flux) to wind speed was observed in worst case conditions. The eddy-correlation method is technically more difficult, requires high-speed data acquisition, and re… more
Date: December 10, 1976
Creator: Shinn, Joseph H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

LMFBR safety program. Annual technical progress report, government fiscal year 1976 and 1976T. [Sodium, fuel, and fission, product aerosol behavior]

Description: Progress is summarized in LMFBR safety studies related to the characterization of sodium fires and fission products. Included are sections on SOMIX Code development, sodium splash dispersal, aerosol leakage, aerosol model improvement, characterization of aerosol source term, large scale molten fuel tests, fuel and fission product release from burning sodium, and iodine attenuation. (DG)
Date: January 10, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical and thermal stability of refrigerant-lubricant mixtures with metals

Description: This report presents completed sealed tube stability test results for the following eight refrigerant/lubricant mixtures: R-22/mineral oil; R-124/alkylbenzene; R-134a/pentaerythritol (PE) ester (mixed acid); R- 134a/PE (branched acid); R-134a/ PE (100 cSt viscosity); R- 142b/alkylbenzene; R-143a/ PE (branched acid); R-152a/alkylbenzene. Partial results are shown for an additional eight refrigerant-lubricant mixtures. Though work is in progress, no data are available at this point in time for th… more
Date: July 10, 1992
Creator: Huttenlocher, D. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

GXQ program user`s guide. Revision 1

Description: This report documents the program user`s guide of a general purpose atmospheric dispersion code named GXQ. GXQ is an IBM Compatible microcomputer based program for calculating atmospheric dispersion coefficients using Hanford site specific joint frequency data. It uses the Gaussian straight line model to calculate either an atmospheric dispersion coefficient (X/Q{prime}) or a maximum normalized air concentration (X/Q). Several options are available to the user which alter the standard Gaussian … more
Date: May 10, 1995
Creator: Hey, B.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

ARMY REACTORS PROGRAM ANNUAL PROGRESS REPORT FOR PERIOD ENDING OCTOBER 31, 1962

Description: ; 8 7 < 8 < : : : 6 9 9 = < 9 < : 5 < > ;" icipation in the program continued to include review, inspection, and support in various areas of reactor technology. An advanced fuel irradiation test program was established that is to be conducted in the pressurized-water loop in the Oak Ridge Research Reactor. Review of the design of the MH-1A reactor was initiated. This reactor, a pressurized-water system fueled with low- enrichment bulk UO/sub 2/ clad with stainless steel, is being designed as a … more
Date: April 10, 1963
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

INTEGRAL FLUX SUPPRESSOR FOR APPR-1, CORE II

Description: An internal flux suppressor will be used for the APPR-1 Core II instead of the external suppressors that are employed in Core I. The reference design of the integral flux suppressor for Core II is as follows: materials Eu/sub 2/O/sub 3/ in stainless steel matrix; compositions 23.2 wt.% Eu/sub 2/O/sub 3/; and dimensions, 0.02 in. x 2.281 in. x 0.875 in. The survey on the cffectiveness of this referencc design has shown that thc peaking of the flux in the control rod fuel element tip is eliminate… more
Date: April 10, 1958
Creator: Leibson, M.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical Technology Division Unit Operations Section Monthly Progress Report, December 1961

Description: The height of transfer units in a 6-in.-ID foam-liquid column for isotopic exchange or stripping of Sr using Sr/sup 89/ tracer were 1.4 to 4.6 in. Denitration of Th(NO/sub 3/)/sub 4/ in an agitated trough to give thoria for dispersion into a sol is reproducible. The loading of UF/sub 6/ on a single layer of 1/8in. right circular cylinders of NaF in the presence of a flowing UF/ sub 6/-N/sub 2/ stream showed strong dependence on gas concentration in the range of 0.58 to 8.0 mole% UF/sub 6/ and a… more
Date: April 10, 1962
Creator: Whatley, M. E.; Haas, P. A.; Horton, R. W.; Ryon, A. D.; Suddath, J. C. & Watson, C. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Shaped Burnable Poison Development Program Under the Euratom Program. Quarterly Progress Report, March 1, 1963-June 30, 1963

Description: Poison demand curves were computed for a boiling water reactor with H/ sub 2/O to UO/sub 2/ ratios of 2.1 and 3.0, a uranium235 enrichment of 3.3 wt%, and fuel depletions in the range of 10,000 to 25,000 Mwd/t. These curves indicate poison lumps in the form of cylinders to be desirable. For these same reactors, the excess reactivity was computed for the cold clean, hot clean non- voided, and hot full-power equilibrium conditions. The excess reactivity was computed with and without a black burna… more
Date: July 10, 1963
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen