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549
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402
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19,433 Matching Results
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An Exploratory Study of the Behavior of Niobium- and Vanadium-Base Alloys in Oxygen-Contaminated Sodium
None
Date:
December 31, 1968
Creator:
Levin, H. A. & Greenberg, S.
Object Type:
Report
System:
The UNT Digital Library
Terrestrial photovoltaic power systems with sunlight concentration. Progress report, January 1, 1975--July 31, 1975
None
Date:
July 31, 1975
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
DEVELOPMENT OF PLUTONIUM-BEARING FUEL MATERIALS. Progress Report for Period January 1 through March 31, 1962
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 recording thermogravimetric balance; the Sharples Micromerograph was committed to Pu, and powder particle size distributions were measured and compared with previous determinations made with air-permeability equipment; and the suitability and reliability of analytical chemistry assaying procedures such as x-ray-fluorescence and gamma spectrometry are being evaluated. Prototype work on UO/sub 2/ for the direct precipitation of PuO/sub 2/ and PuO/ sub 2/-UO/sub 2/ feed materials for swaging, vibratory compaction, and dispersion fabrication was also continued. In addition, investigation of PuO/sub 2/ spherical particle formation by mechanical buildup and by plasma torch fusion was extended. Associated reactor physics studies were concentrated on the further comparison of Pu and U/sup 235/ in near-thermal converter reactors. In preparation for the fabrication of irradiation test specimens to be prepared by the mechanical blending of …
Date:
October 31, 1962
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Chemical Processing Technology Quarterly Progress Report, January-March 1961
Studies are reported on aqueous zirconium processing, dissolution of BeO- UO/sub 2/ ceramic fuel, the aqueous stainless steel process, the behavior of dibutyl phosphates, use of boron (boric acid) solution to assure critical safety, fluidized bed calcination, conversion of amorphous alumina to alpha alumina, the Demonstrational Waste Calcining Facility, removal of long-lived radioisotopes from waste solutions, separation of iron, nickel, and chromiun from stainless steel waste solutions, electrolytic dissolution, effects of stray currents, electrolytic disintegration of Zircaloy-2, corrosion evaluation of materials of construction, the ARCO process, a direct air pulsed extraction column, and large vessel criticality control. (M.C.G.)
Date:
October 31, 1962
Creator:
Bower, J. R.
Object Type:
Report
System:
The UNT Digital Library
Homogenization of arc-melted uranium-6 weight percent niobium alloy ingots
Microsegregation and macrosegregation in uranium-6 niobium arc-melted ingots were characterized by electron microprobe analysis. Homogenization studies determined that microsegregation can be eliminated by heat treating the alloy for six hours at 1100/sup 0/C. Extensive homogenization did not eliminate macrosegregation (banding) from the as-cast alloy, but a mathematical model describing banding and coring indicated that banding could possibly be eliminated by working prior to homogenization.
Date:
January 31, 1978
Creator:
Snyder, W. B., Jr.
Object Type:
Report
System:
The UNT Digital Library
Physics Division Summary Report, July--September 1967
None
Date:
August 31, 1968
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Heating/daylighting prototype development. Phase I, Passive and Hybrid Solar Manufactured Building Project. Interim report and project status report No. 1, 1 October 1979-29 February 1980
Climatological data, both representative (typical) and extreme conditions, relevant to building energy use in Grandview, Missouri are presented. The energy-related characteristics of a particular building and its use are merged with ambient weather conditions. The graphs depict daily fluctuations in the major categories of building heating/cooling load for the experimental building (Roof Runner facility) at Butler Research Center. Data input include hourly weather and building occupancy schedules, the geometry and fixed thermal characteristics (component R-values, heat capacities, etc.) of the prototype structure, and variable conditions (status of moveable insulating shutters, HVAC operating modes, etc.). The prototype systems to be incorporated in the new Roof Runner building are shown. Both warehouse (no ceiling) and office (suspended ceiling) system types are included. The diagrams conceptually depict the heat flows in several representative operating modes, sampling the wide variety of operating conditions which will be evaluated during the testing phase of this project. Cost estimates for the designs selected for construction are provided. (MHR)
Date:
March 31, 1980
Creator:
Snyder, M.; Fraker, H.; Lindsey, L.; Braham, W.; Hallagan, W. & Huffman, J.
Object Type:
Report
System:
The UNT Digital Library
Continuous Czochralski growth. Silicon sheet growth development of the large area silicon sheet task of the Low Cost Silicon Solar Array Project. First quarterly progress report, October--December 1977
The development of equipment and processes to produce single crystal solar silicon by a continuous Czochralski method was studied. ''Continuous'' is defined as the ability to produce 100 kilograms of crystal from only one melt container. The equipment to be used is a Hamco CG2000 Production Crystal Grower. Certain modifications will be made to the grower to enable periodic replenishment of silicon into the crucible and removal of grown crystals. The crystal grower was constructed and installed in a separate room designated and prepared for the project. It was adapted with a modified throat, a vacuum-tight isolation valve, an enlarged pull chamber to hold a supply of poly material, and a modified automatic diameter control (ADC) optical system. It was fully tested and made ready for trial runs. Designs are under way for other modifications to the equipment, including a recharge system, a polysilicon attachment device, and a modified bead-chain pull mechanism capable of pulling and simultaneously weighing a 30 to 40 Kg growing crystal. An economic model was developed for batch CZ as a base-line reference, and for two methods of continuous CZ. Preliminary analysis indicates a cost (value added by crystal growth) of approximately $13 to $17 per …
Date:
December 31, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Physics Division Summary Report, February-March 1962
Progress is reported in experimental nuclear physics on calculations concerning the distribution of lifetimes of neutrons in glass scintillation neutron detectors and on the probabilities for single, double, and triple scattering of neutrons in thin plates. Precision measurements of gamma-ray energies and intensities were used to modify and extend the level scheme of Hf/ sup 178/. The presence of three K = 0 rotational bands (besides the ground state) and two K = 2 rotational bands are indicated in the level scheme of this isotope. In other work the fluorescence properties of polystyrene were found to depend on concentration of residual styrene monomer and the average molecular weight. Research is also reported in theoretical physics on dynamics of nuclear collective motion, scatter ing of alpha particles by a vibrational nucleus, flux quantization and time-reversal degeneracy, and elastic nucleonnucleon scattering at high energies and small angles. (J.R.D.)
Date:
October 31, 1962
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
ADVANCED PRESSURE VESSEL MATERIALS.
Data on 5Cr - 3Mo - 12Ni alloy, PH13 - 8Mo and Iconel 718 for pressure vessel application are given. The 5Cr - 3Mo - 12Ni posseses characteristics suited to uniform aging of heavy sections. Tensile and toughness properties are good, and structural stability up to 315 deg C is adequate. Weldability with 12Ni - 3Cr - 3Mo filler material is good but 12Ni - 5Cr - 3Mo filler is more efficient. Aging characteristics of PH13 - 8Mo may not be suited to uniform aging of heavy sections. Excellent tensile properties and good toughness can be developed. The alloy is structurally stable at long time heating at 425 deg C. Good weldability with filler metal of matching composition was exhibited but weld ductility and toughness are only fair. (F.S.)
Date:
October 31, 1969
Creator:
Robertshaw, F.C.; Stephan, H.R. & McConnelee, J.E.
Object Type:
Report
System:
The UNT Digital Library
SILICON GERMANIUM THERMOELECTRIC MATERIALS AND MODULE DEVELOPMENT PROGRAM. 4th Quarterly Report, October 1--December 31, 1968.
None
Date:
October 31, 1969
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
TERRESTRIAL OCCURRENCE AND DISTRIBUTION OF $sup 129$I.
None
Date:
October 31, 1969
Creator:
Edwards, R.R.
Object Type:
Report
System:
The UNT Digital Library
Design Data and Safety Features of Commercial Nuclear Power Plants. Vol. 2. Docket No. 50-296 Through 50-395
None
Date:
December 31, 1972
Creator:
Heddleson, F. A.
Object Type:
Report
System:
The UNT Digital Library
Materials Development for Isotopic Power Sources.
None
Date:
October 31, 1969
Creator:
Donnelly, R.G.
Object Type:
Report
System:
The UNT Digital Library
High-Temperature Research on Carbides for Fuel and Structural Applications.
High temperature physico-chemical properties of refractory carbides for fuel and structural use were determined. Density and phases of vacuum hot pressed HfC, TaC, and ZrC are tabulated and the diffusion coefficients, lattice parameters, and thermodynamic properties of TaC and UC are given. (F.S.)
Date:
October 31, 1969
Creator:
White, J. F. & Juenke, E. F.
Object Type:
Report
System:
The UNT Digital Library
Physics Division Summary Report, April-May 1962
None
Date:
October 31, 1962
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
INOCULATED PACK STUDIES ON CLOSTRIDIUM BOTULINUM TYPE E IN UNIRRADIATED AND IRRADIATED HADDOCK.
None
Date:
October 31, 1969
Creator:
Segner, W.P. & Schmidt, C.F.
Object Type:
Report
System:
The UNT Digital Library
Molten-Salt Processing and Preparation.
None
Date:
October 31, 1969
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
REACTIONS OF SELECTED HALOGENS AND INTERHALOGENS ACTIVATED BY RADIATIVE NEUTRON CAPTURE AND ISOMERIC TRANSITION WITH CONDENSED STATE CYCLOPENTANE AND AROMATIC HYDROCARBONS
None
Date:
December 31, 1970
Creator:
Kemnitz, E.J. Jr.
Object Type:
Report
System:
The UNT Digital Library
EXPERIMENTAL INVESTIGATION OF THE EFFECTS OF ULTRASONIC VIBRATIONS ON BURNOUT HEAT FLUX WITH BOILING WATER. Quarterly Technical Progress Report, October-December 1960
>The effects of an ultrasonic field on the maximum nucleate heat flux that can be sustained by boiling water in a flow system are being investigated. Design and procurement of apparatus is underway. (M.C.G.)
Date:
October 31, 1962
Creator:
Romie, F.E.
Object Type:
Report
System:
The UNT Digital Library
AN INTEGRATED CIRCUIT CONTROL SYSTEM FOR THE PEWEE REACTOR.
None
Date:
October 31, 1969
Creator:
Strait, B.G. & Lang, R.M.
Object Type:
Report
System:
The UNT Digital Library
DELAYED LUMINESCENCE IN ALKALI HALIDES UNDER F BLEACHING.
None
Date:
October 31, 1969
Creator:
Manilerd, C & Kim, Y W
Object Type:
Report
System:
The UNT Digital Library
Evaluate fundamental approaches to longwall dust control. Phase III report
The overall objective of the contract is to evaluate the effectiveness of available dust control technology for double-drum shearer longwall sections in a coordinated, systematic program at a few longwall test sections and to make the results available to the entire coal mining industry. This program is investigating nine different dust control techniques. These nine subprograms encompass a broad range of dust control measures ranging from administrative controls to new hardware. They span not only presently employed methods but also those recently adopted in the United States and those proposed for the future. This report documents the Phase III effort on each of the subprograms. For clarity, the report is divided in sections by subprogram as follows: Section 2, Subprogram A - passive barriers/spray air movers for dust control; Section 3, Subprogram B - practical aspects of deep cutting; Section 4, Subprogram C - stage loader dust control; Section 5, Subprogram D - longwall automation technology; Section 6, Subprogram E - longwall application of ventilation curtains; Section 7, Subprogram F - reversed drum rotation; Section 8, Subprogram G - reduction of shield generated dust; Section 9, Subprogram H - air canopies for longwalls; and Section 10, Subprogram I - mining …
Date:
March 31, 1984
Creator:
Babbitt, C.; Bartlett, P.; Kelly, J.; Ludlow, J.; Mangolds, A.; Rajan, S. et al.
Object Type:
Report
System:
The UNT Digital Library
COMPUTER SIMULATION OF HOT-ZONE REACTIONS. II.
None
Date:
October 31, 1969
Creator:
Anselmo, V.C. & Rekart, L.
Object Type:
Report
System:
The UNT Digital Library