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DEVELOPMENT OF PLUTONIUM-BEARING FUEL MATERIALS. Progress Report, October 1-December 31, 1961

Description: Continued effort is reported on preparation and characterization of PuO/ sub 2/ and UO/sub 2/-- PuO/sub 2/ mixtures. Sintering and characterization of pellets for irradiation tests was emphasized, and efforts were also devoted to plasma torch production of spherical PuO /sub 2/ and coating of oxide materials. PuO/sub 2/ produced by the oxalate process from low concentration feed contains agglomerates which are not readily broken down, while that produced from normal feed contains larger agglome… more
Date: October 31, 1962
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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DEVELOPMENT OF PLUTONIUM-BEARING FUEL MATERIALS. Progress Report for Period January 1 through March 31, 1962

Description: During this reporting period, particular effort was of aced on powder blending and pellet sintering studies prior to irradiation sample fabrication, and, subsequently, the production and characterization of the pellets slated for irradiation. Also, PuO/sub 2/ and UO/sub 2/-PuO/sub 2/ characterization studies were continued, and new techniques are being developed. Specifically, dynamic moisture pickup determinations on PuO/sub 2/ were made in moist air, N, and CO/ sub 2/ atmospheres using a reco… more
Date: October 31, 1962
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advances in materials science, Metals and Ceramics Division. Triannual progress report, October 1979-January 1980

Description: Progress is summarized concerning magnetic fusion energy materials, laser fusion energy, aluminium-air battery and vehicle, geothermal research, oil-shale research, nuclear waste management, office of basic energy sciences research, and materials research notes. (FS)
Date: March 31, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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DEVELOPMENT OF PLUTONIUM BEARING FUEL MATERIALS. Progress Report for period July 1 through September 30, 1961

Description: Data are tabulated for the characteristic parameters of PuO/sub 2/ powders prepared by the continuous oxalate precipitation process. The results show that the PuO/sub 2/ surface area decreases almost linearly with calcination hold times at 760 deg C. A thermogravimetric study of the decomposition of Pu oxalate indicate the formation of an initial stable compound at ~ l00 deg C and a stable intermediate at ~ 300 deg C. Characteristic data are tabulated for UO/sub 2/ -5% PuO/sub 2/ and UO/sub 2/-… more
Date: October 31, 1962
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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JBK-75 microstructure specification recommendation. [Modified A-286]

Description: Since the ASTM-E-45 standard for microcleanliness is not applicable to superalloys like JBK-75 stainless steel (Modified A-286), Rocky Flats should adopt the Ladish microcleanliness standard (APML Cleanliness Classification of High Temperature Alloys Chart, 1971), as a guide for setting material acceptance specifications for JBK-75. Inclusion ratings of S-2, N-2, C-2, and M-2 should be acceptable. The microstructure should have a grain size of 5 or finer, but not smaller than 9, and microsegreg… more
Date: October 31, 1977
Creator: Brewer, A. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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SNAP Radioisotope Space Programs Task 7. Quarterly Progress Report No. 7, April 1 Through June 30, 1961

Description: Safety analyses of the launch of SNAP-type units as to launch, ascent, and intermediate or final-stage failures are reported. A preliminary design study to define the configuration and performance of the Surveyor generator is completed. Dispersion patterns are found for radioactive materials released by the high-velocity vertical impact of Surveyor-type generators on the moon. High- velocity testing methods are discussed. Flare and telemetry capsules, designed to simulate fuel cores of nuclear … more
Date: October 31, 1962
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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PHYSICAL METALLURGY OF FAST BREEDER REACTOR CLADDING MATERIALS AND REFRACTORY METALS.

Description: Studies on Re - Mo - W alloys led to lower cost production procedures and greatly improved room temperature ductility properties of powder metallurgy materials used for fast breeder reactor fuel cladding materials. Data are presented for ductility, grain size, hardness, recrystallization, and changes in aging at temperatures up to 2000 deg C for periods up to 1000 hrs. (F.S.)
Date: October 31, 1969
Creator: Collins, C.G. & Bohlander, K.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of the LICADO coal cleaning process

Description: Development of the liquid carbon dioxide process for the cleaning of coal was performed in batch, variable volume (semi-continuous), and continuous tests. Continuous operation at feed rates up to 4.5 kg/hr (10-lb/hr) was achieved with the Continuous System. Coals tested included Upper Freeport, Pittsburgh, Illinois No. 6, and Middle Kittanning seams. Results showed that the ash and pyrite rejections agreed closely with washability data for each coal at the particle size tested (-200 mesh). A 0.… more
Date: July 31, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental and theoretical studies of particle generation afterlaser ablation of copper with background gas at atmosphericpressure

Description: Laser ablation has proven to be an effective method for generating nanoparticles; particles are produced in the laser induced vapor plume during the cooling stage. To understand the in-situ condensation process, a series of time resolved light scattering images were recorded and analyzed. Significant changes in the condensation rate and the shape of the condensed aerosol plume were observed in two background gases, helium and argon. The primary particle shape and size distribution were measured… more
Date: May 31, 2007
Creator: Wen, Sy-Bor; Mao, Xianglei; Greif, Ralph & Russo, Richard E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Final Report for Fractionation and Separation of Polydisperse Nanoparticles into Distinct Monodisperse Fractions Using CO2 Expanded Liquids

Description: The overall objective of this project was to facilitate efficient fractionation and separation of polydisperse metal nanoparticle populations into distinct monodisperse fractions using the tunable solvent properties of gas expanded liquids. Specifically, the dispersibility of ligand-stabilized nanoparticles in an organic solution was controlled by altering the ligand-solvent interaction (solvation) by the addition of carbon dioxide (CO{sub 2}) gas as an antisolvent (thereby tailoring the bulk s… more
Date: August 31, 2007
Creator: Roberts, Chistopher
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Numerical Simulation of Interaction of Hypervelocity Particle Stream with a Target

Description: We present results of direct numerical simulations of impact of hypervelocity particle stream with a target. The stream of interest consists of submillimeter (30-300 micron) brittle ceramic particles. Current supercomputer capabilities make it possible to simulate a realistic size of streams (up to 20 mm in diameter and 500 mm in length) while resolving each particle individually. Such simulations make possible to study the damage of the target from synergistic effects of individual impacts. In… more
Date: July 31, 2007
Creator: Lomov, I; Liu, B; Georgevich, V & Antoun, T
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fixed-bed gasification research using US coals. Volume 5. Gasification of Stahlman Stoker bituminous coal

Description: A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report is the fifth volume in a series of reports describing the atmospheric pre… more
Date: March 31, 1985
Creator: Thimsen, D.; Maurer, R. E.; Pooler, A. R.; Pui, D.; Liu, B. & Kittelson, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fixed-bed gasification research using US coals. Volume 2. Gasification of Jetson bituminous coal

Description: A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report describes the gasification testing of Jetson bituminous coal. This Wester… more
Date: March 31, 1985
Creator: Thimsen, D.; Maurer, R. E.; Pooler, A. R.; Pui, D.; Liu, B. & Kittelson, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fixed-bed gasification research using US coals. Volume 3. Gasification of Rosebud sub-bituminous coal

Description: A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report is the third volume in a series of documents prepared by Black, Sivalls a… more
Date: March 31, 1985
Creator: Thimsen, D.; Maurer, R. E.; Pooler, A. R.; Pui, D.; Liu, B. & Kittelson, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Characterization of the solid, airborne materials created by the interaction of UF/sub 6/ with atmospheric moisture in a contained volume

Description: Several experiments have been performed in which UF/sub 6/ was released into air under static conditions in a 6 m/sup 3/ release chamber in order to characterize the solid products of hydrolysis as the amount of UF/sub 6/ released was increased. An aerosol concentration of approx. 25 gm/m/sup 3/ (150 gm) was the largest achieved. Electron microscopy was used to determine the morphology of the aerosol particles and to obtain geometric size measurements from micrographs and a cascaded impactor wa… more
Date: December 31, 1984
Creator: Pickrell, P. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Small power systems study. Volume. Study results. Technical summary report

Description: The Division of Solar Technology of the Department of Energy is currently examining the market potential of a number of dispersed solar energy systems, including the small (less than or equal to 10 MW/sub e/) solar thermal power system. Small fossil-fueled generating units in the United States utility system, (i.e., investor-owned, municipal, and cooperatives) have a current capacity of approximately 8000 MW/sub e/ or about 1.5 percent of the total US electrical capacity, and provide a large po… more
Date: May 31, 1978
Creator: Sitney, L.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fixed-bed gasification research using US coals. Volume 4. Gasification of Leucite Hills subbituminous coal

Description: A single-staged, fixed-bed Wellman-Galusha gasifier coupled with a hot, raw gas combustion system and scrubber has been used to gasify numerous coals from throughout the United States. The gasification test program is organized as a cooperative effort by private industrial participants and governmental agencies. The consortium of participants is organized under the Mining and Industrial Fuel Gas (MIFGa) Group. This report is the fourth volume in a series of reports describing the atmospheric pr… more
Date: March 31, 1985
Creator: Thimsen, D.; Maurer, R. E.; Pooler, A. R.; Pui, D.; Liu, B. & Kittelson, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Development and Field Testing of a System for Determination of Ultrafine Activity Particle Size Distribution and Working Levels

Description: Recent investigations of radon decay products in indoor air have shown that what has been called the unattached'' fraction is in fact an ultrafine size aerosol with diameters in the range of 0.5 to 10 nm. There are a number of difficulties in characterizing particles in this size range. Classical diffusion batteries using screens with high mesh numbers do not have the resolution to give detailed information for the ultra fine range. The use of single screens of differing mesh numbers (Graded Sc… more
Date: October 31, 1990
Creator: Hopke, Phillip K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Integrated methods for production of clean char and its combustion properties. Interim final technical report, September 1, 1991--August 31, 1992

Description: An integrated method consisting of physical coal cleaning, mild gasification (MG) and low temperature oxidation (LTO) is proposed to produce chars with SO{sub 2} emissions at least 50% lower than those of their parent coals. Mild gasification and char desulfurization studies are conducted in both a batch fluidized-bed reactor and in a continuous rotary kiln reactor. MG chars were subjected to a LTO step to remove additional sulfur. Under non-optimized conditions, SO{sub 2} emissions of the MG c… more
Date: December 31, 1992
Creator: DeBarr, J. A.; Rostam-Abadi, M.; Gullett, B. K.; Benson, S. A. & Toman, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Optical properties of fractal nanocomposites

Description: Optical prossesses in nanostructured fractal composites are shown to be strongly enhanced. The enhancement occurs because of a localization of dipolar eigenmodes in subwavelength areas.
Date: December 31, 1994
Creator: Markel, V. A.; Kim, W.; Armstrong, R.; Shalaev, V. & Stechel, E. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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