36 Matching Results

Search Results

Advanced search parameters have been applied.

Dynamic Determination of the Compressibility of Metals

Description: Abstract: "Equation of State data for duralumin in the pressure range from 0.1 to 0.3 megabar have been determined dynamically by measuring shock and free surface velocity electrically in a place of 24 ST duralumin which has been stressed by a high explosive donation. The theory is presented which allows comparison with data obtained by other experimenters, requiring the relationship between pressure and compression either at constant entropy or constant temperature. The empirical form chosen for the equation of state p = αμ + βμ-2 expresses the pressure as a quadratic function of the compression. Experimental techniques are described in detail. Five points are given for equation of state of duralumin in the pressure range from approximately 0.15 megabar to 0.33 megabars. Some data are also presented for cadmium and steel."
Date: 1954
Creator: Goranson, Roy W.; Bancroft, Dennison; Burton, Blendin L.; Blechar, Theodore; Houston, Edwin E.; Gittings, Elisabeth F. et al.
Partner: UNT Libraries Government Documents Department

The First Crystallographic Data for Curium Compounds

Description: Abstract: "X-ray powder patterns of two curium compounds, the trifluoride and the oxide, have been obtained, using sub-microgram specimens. The fluoride prepared by precipitation from aqueous solution with HF is isomorphous with NdF3. Treatment of CmF3 with F2 (g, 1 atm.) did not convert it to CnF4 or higher fluoride. Air ignition of curium oxalate gave a compound having a cubic lattice with a constant expected for Cm2O3 rather than for Cmo2. Due to the extremely high level of gamma and x-radiation accompanying Ca-242 alpha emission (162 days half-life)-(2,3), it has heretofore been impossible to obtain x-ray powder patterns of any curium compounds. Another difficulty has been the danger of contamination, as the specific activity of curium is 7 x 10-9 d/m/[mu]g. We have found that patterns, even though of poor quality, sufficient to identify the structure can be obtained by using very small samples in thin, tapered capillaries with short exposure times."
Date: 1954
Creator: Asprey, L. B. & Ellinger, F. H.
Partner: UNT Libraries Government Documents Department

Independent and Relative Yields of I¹³¹, I¹³², I¹³³, I¹³⁴, and I¹³⁵ Formed in Fission of U²³⁵ by 14-Mev and Thermal Neutrons

Description: Abstract: "The following results were derived from experiments in which iodine was quickly separated from irradiated uranium metal at a known time after irradiation. The fractional chain yields are based on the cumulative chain yields at iodine."
Date: 1954
Creator: Wahl, Arthur C.
Partner: UNT Libraries Government Documents Department

Magnesium-Uranium Alloy System

Description: Analytical, x-ray, thermal, and metallographic data have been obtained in the study of the magnesium-uranium system, and a proposed phase diagram has been constructed.
Date: 1954
Creator: Tracy, George A.; Chiotti, P. & Wilhelm, Harley A.
Partner: UNT Libraries Government Documents Department

A Miniature Pilot Plant for High Level Separations Processes

Description: "This paper describes a miniature pilot plant for studying solvent extraction processes which can be built at a small fraction of the cost of that associated with semi-works construction, and can be used to obtain data comparable to that from pilot plant runs."
Date: 1954
Creator: Coplan, B. V. & Codding, James W.
Partner: UNT Libraries Government Documents Department

U-233 Power-Breeder Reactor: Reactor Design and Feasibility Problem

Description: Report containing information regarding several designs of breeder reactors that utilizes the circulation of solid particles consisting of a fuel-moderator mixture, from the core to a separate heat exchanger vessel from which the solids flow freely to and through the core by gravity" (p. 13). Appendix begins on page 117.
Date: January 1954
Creator: Halik, R. R.; Beckberger, L. H.; Haibeck, J. M.; Mealia, J. E.; Northrop, W. A.; Rees, D. R. et al.
Partner: UNT Libraries Government Documents Department

Project "A" Final Summary Report

Description: Report discussing the results of Project "A," which had three main components: "Effect of P2O3 Concentration on the Distribution Coefficient for Uranium Between Crude Phosphoric Acid and O.P.P.A.," "Effect of Chloride Concentration in Phosphoric Acid on the Distribution Coefficient for Uranium Between O.P.P.A. and Phosphoric Acid," and "The Use of Di-Isobutyl Carbinol in the Preparation of a Solvent to Extract Uranium from Phosphoric Acid (N.P.P.A.)."
Date: January 4, 1954
Creator: Wilkinson, G. E.
Partner: UNT Libraries Government Documents Department

The Nuclear Research Reactor at the University of Michigan: An Evaluation of the Hazards of Operation and Provisions for Limiting These Hazards

Description: The following report discusses the operation of the nuclear research reactor at the University of Michigan, as well as the maximum credible accident to the reactor.
Date: April 22, 1954
Creator: Luckow, William K.; Mesler, Russell B. & Widdoes, Lawrence C.
Partner: UNT Libraries Government Documents Department

Freezing of Ice Plugs in Process Lines of the HRT

Description: The following report studies a method of freezing ice plugs in pipe lines before flanges are disconnected, the intention is to prevent light water from entering the system when equipment is removed for repairs.
Date: April 23, 1954
Creator: Reynolds, Albert B.; Buchanan, J. R., Jr.; Lueders, R. E. & Stewart, W. A.
Partner: UNT Libraries Government Documents Department

Determination of Hydrogen in Lithium Hydride

Description: Abstract: "A method for determining hydrogen in lithium hydride by heating samples with lead at 600 C, was developed. The hydrogen evolved during thermal decomposition of the hydride is purified and oxidized to water with cupric oxide at 400 C. The analysis is completed by collecting and weighing this water. Success in development of the analytical procedure has depended upon a careful design and assembly of equipment for handling samples in a dry, inert atmosphere. For seven pure hydride samples analyzed by the recommended method the estimates of the standard deviation varied between 0.12 and 0.41 percent lithium hydride (or 1.3 and 4.2 parts per thousand) for 8 to 18 determinations on each sample. The procedure is relatively insensitive to variations in certain conditions. For single-piece samples weighing 0.2 to 0.5 gram it was found to be more satisfactory than a method which uses mercury in place of lead for sample decomposition. For powdered lithium hydride samples the lead and mercury methods are equally satisfactory."
Date: May 1954
Creator: Bergstresser, K. S. & Waterbury, Glenn R.
Partner: UNT Libraries Government Documents Department

Separation of Small Amounts of Scandium From Uranium

Description: Abstract: A method for separating small amounts of scandium (1 to 10 mg.) from a gram of uranium depends upon formation of insoluble uranium peroxide while the scandium in solution is complexed with ethylenediamine-tetraacetic acid. The precipitated peroxide carries down less than 30 p.p.m. of scandium. Uranium left in solution, less than one milligram in amount, does not interfere when the scandium is precipitated as ammonium scandium tartrate and determined gravimetrically by ignition of the tartrate to the oxide.
Date: May 1954
Creator: Bergstresser, Karl S.
Partner: UNT Libraries Government Documents Department

Scale-Up of Alternate HRT Core

Description: "In order to determine the factors involved in the scale-up of cores with concentric inlet and outlet pipes, a 48 inch carbon steel flow model, geometrically similar to a 6 foot diameter core, has been assembled and tested...Visual studies were made of dye and gas behavior in the sphere, and quantitative measurements of point residence times were obtained through the use of conductivity cells actuating a Brush recorder. Static pressure drop across the core was measured."
Date: May 7, 1954
Creator: Lesem, L. B. & Harley, P. H.
Partner: UNT Libraries Government Documents Department

Response of Pressure Gauges to Dust-Laden Shock Waves

Description: "A series of shock tube studies demonstrate that two types of pressure gauges respond to dust carried with shock waves by indicating an increase in dynamic pressure. This contribution to the dynamic pressure is approximately the product of the dust density and the square of the dust velocity under the experimental conditions. Besides this information studies give insight into the interaction of a square shock wave with dust when that dust is placed in a plane before and parallel to the shock front. It is found that the shape of the pressure wave is little changed except for a rounding of the front. The dust, after accelerating, is carried as a pulse with the mass flow velocity of the air."
Date: 1954-05-21?
Creator: Banister, John Robert & Broyles, C. D.
Partner: UNT Libraries Government Documents Department

Oriented Dioxide Films on Uranium

Description: This report deals with the formation of oriented layers of an oxide which form during oxidation without any evident relationship to the parent and underlying metal. It is offered without explanation or proposed mechanism.
Date: July 6, 1954
Creator: Waber, James T. & O'Rourke, J. A.
Partner: UNT Libraries Government Documents Department