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Active Process Development Activities for Processing of Feed Materials

Description: The carbonate and organic leaching processes for the recovery of U from its ores are outlined. The Excer prccess (ion-exchange conversion and electrolytic reduction) and the Fluorox process (starch-- HF reaction) for the production of UF/sub 4/ from ore concentrate and depleted reactor fuels are described. The fluidized-bed process for UF/sub 4/ production from UO/sub 2/(NO/ sub 3/)/sub 2/ is also described. Methods for improving the reactivity of UO/sub 3/ and mechanical and thermal processes for increasing the density of UF/sub 4/ were investigated. Applications of fluoride volatility prccesses to feed materials are discussed. (C.W.H.)
Date: January 1, 1956
Partner: UNT Libraries Government Documents Department

Aerodynamic Characteristics at Mach Numbers of 1.61 and 2.01 of Various Tip Controls on the Wing Panel of a 0.05-Scale Model of a Martin XASM-N-7 (Bullpup) Missile: TED No. NACA AD 3106

Description: "An investigation has been conducted in the Langley 4- by 4-foot supersonic pressure tunnel to determine the control effectiveness and hinge-moment characteristics of the Martin XASM-N-7 (Bullpup) missile. A half-scale wing panel was tested with a tip control having three different hinge-line locations. The tests were made over an angle-of-attack range from -10 to 10 degrees and a control-deflection range of -15 to 3 degrees" (p. 1).
Date: 1956~
Creator: Driver, Cornelius
Partner: UNT Libraries Government Documents Department

Airfield Pavement Evaluation: Report Number 8, Ardmore Air Force Base, Ardmore, Oklahoma

Description: Summary: results of flexural strength, CBR, and plate bearing tests, moisture and density determinations, mechanical analysis, and Atterburg limits tests conducted on the pavements, bases, and subgrades of the various landing facilities at this airfield are used in this report to evaluate the load-carrying capacity of the pavements with respect to various landing-gear assemblies and operational-life categories.
Date: January 1956
Creator: Waterways Experiment Station (U.S.)
Partner: UNT Libraries Government Documents Department

Analyses of Ash from United States Coals

Description: Report summarizing analyses done on ash of coal from the United States.
Date: 1956
Creator: Selvig, W. A. & Gibson, F. H.
Partner: UNT Libraries Government Documents Department

An analysis of the stability and ultimate compressive strength of short sheet-stringer panels with special reference to the influence of the riveted connection between sheet and stringer

Description: A method of strength analysis of short sheet-stringer panels subjected to compression is presented which takes into account the effect that the riveted attachments between the plate and the stiffeners have on the strength of panels. An analysis of experimental data shows that panel strength is highly influenced by rivet pitch, diameter, and location and that the degree of influence for a given riveting depends on the panel configuration and panel material.
Date: 1956
Creator: Semonian, Joseph W. & Peterson, James P.
Partner: UNT Libraries Government Documents Department

Argonne National Laboratory Annual Report: 1956

Description: Report issued by the Argonne National Laboratory discussing the variety of work done at the laboratory during the year of 1956. This report includes tables, illustrations, and photographs.
Date: 1956
Creator: Argonne National Laboratory
Partner: UNT Libraries Government Documents Department

BASIC PRINCIPLES INVOLVED IN THE MACRO-SEPARATION OF ADJACENT RARE EARTHS FROM EACH OTHER BY MEANS OF ION EXCHANGE

Description: BS>The separation of rare earth mixtures by ion exchange using ammonium ethylenedisminetetracetate and annmonium N-hydroxyethylethylenediaminetriacetate as eluting agents is discussed in detail. Simple countercurrent separation theory is used to predict the minimum nuinber of displacements of an adsorbed band that are necessary in order to separate the components of binary mixtures. It is shown how the theory can be applied to even more complex systems, and experimental data are presented for some of the more difficultly separablc groups of rare-earth species. Experimental results agree very well with the theoretical predictions. (auth) A detailed description is presented of a process developed by Ames Laboratory for the separation of thorium, rare earths, and uranium from monazite sands. Oxalic acid is used to precipitate rare earths; and thorium from a sulfate and phosphate solution of these elements. The possibility of recovering uranium from the oxalate filtrate by anion exchange was investigated. (W.L.H.)
Date: January 1, 1956
Creator: Powell, J.E. & Spedding, F.H.
Partner: UNT Libraries Government Documents Department

Bibliography of Bureau of Mines Health and Safety Publications: January 1947-June 1955

Description: From Introduction: "While the basic purpose of this bulletin is to describe health and safety reports for the period January 1947 through 1955, a selected number of earlier publications that are believed pertinent for reference purposes are included."
Date: 1956
Creator: Humphrey, H. B. & Stratton, Hazel J.
Partner: UNT Libraries Government Documents Department

Birth and Development of Parícutin Volcano, Mexico

Description: From introduction: In this report the authors have attempted to present a strictly factual account of the birth and development of Paricutin volcano and avoid any interpretive opinions that might break the true narrative of events.
Date: 1956
Creator: Foshag, William F. & González Reyna, Jenaro
Partner: UNT Libraries Government Documents Department

Cloud-droplet ingestion in engine inlets with inlet velocity ratios of 1.0 and 0.7

Description: Report presenting the paths of cloud droplets into two engine inlets for a wide range of meteorological and flight conditions. The amount of water in droplet form ingested by the inlets and the amount and distribution of water impinging on the inlet walls is obtained from droplet-trajectory configurations. Results regarding an inlet with velocity ratio of 1.0 and a ratio of 0.7 are provided.
Date: January 1956
Creator: Brun, Rinaldo J.
Partner: UNT Libraries Government Documents Department

Compressive Crippling of Structural Sections

Description: "A method is presented for calculating crippling stresses of structural sections as a function of material properties and the proportions of the section. The presence of formed or anisotropic material is accounted for by the use of an effective stress-strain curve. The method of analysis applies to many sections for which a procedure for calculating crippling was not previously available" (p. 1).
Date: January 1956
Creator: Anderson, Melvin S.
Partner: UNT Libraries Government Documents Department

Contributions to Economic Geology 1955

Description: A report about phosphates found in the Permian Phosphoria formation of the Rocky Mountains. This area constitutes one of the worlds largest reserves of phosphate.
Date: 1956
Creator: Cressman, Earle R.
Partner: UNT Libraries Government Documents Department

Correlation of Crippling Strength of Plate Structures With Material Properties

Description: "A correlation approach to the crippling-strength analysis of plate structures in new materials and at elevated temperatures is presented. Appropriately defined crippling-strength moduli and correlation procedures are given for predicting the effect of a change in material properties on the strength of a structure. The strength moduli are readily calculated from the effective compressive stress-strain curve for the structural material" (p. 1).
Date: January 1956
Creator: Anderson, Roger A. & Anderson, Melvin S.
Partner: UNT Libraries Government Documents Department

Corrosion Characteristics of Uranium : An Electron Diffraction Study

Description: Abstract: "The initial product formed on relatively oxide-free uranium has been shown by electron diffraction to be the alpha or low temperature form of uranium hydride. Such as oxide-free surface has been prepared by polishing the metal within the electron diffraction unit while maintaining a vacuum of 10^-7 mm Hg. Uranium dioxide lines appear later and grow in intensity. Electron diffraction studies are reported on vacuum annealed metal."
Date: 1956
Creator: Waber, James T. & Whyte, Dawn D.
Partner: UNT Libraries Government Documents Department

CORROSION PROBLEMS IN NUCLEAR POWER PLANTS COOLED WITH PRESSURIZED WATER

Description: Starting with a simplified flow sheet, the general arrangement of pressurized water reactors is presented to provide a basis for discussing the corrosion problems, the reactor proper, the primary coolant system external to the reactor, and the secondary or steam system. Effects of corrosion are emphasized, using conventional corrosion problems as a reference for comparison. The role of induced radioactivity on the secondary effects of corrosion is explored, primarily from the standpoint of accessibility for maintenance. Also covered is the potential fouling of heat transfer surfaces by deposited corrosion products. (auth)
Date: January 1, 1956
Creator: Koenig, R.F.
Partner: UNT Libraries Government Documents Department

Critical Masses of Mildly Diluted U²³⁵ Systems Derived from Reactivity Contribution Data

Description: Abstract: "Radioactivity contribution data, obtained from U²³⁵ critical assemblies at Pajerito can be used to predict the effects of diluents on critical mass. The radioactivity contribution data versus radius for diluents in a given assembly may be expressed as a single functional relationship between integral absorption and transport cross sections of the diluents. Using this relation, there can be obtained a general expression for the dependence of critical mass upon volume fraction and the effective absorption and transport cross sections of the diluent."
Date: 1956
Creator: Engle, Leon B.
Partner: UNT Libraries Government Documents Department

Design Criteria for Axisymmetric and Two-Dimensional Supersonic Inlets and Exits

Description: Report presenting design charts for single- and double-oblique-shock inlets and isentropic axisymmetric and two-dimensional surfaces with theoretically focused Mach lines for Mach numbers up to 4.0. The requirement of internally and externally attached shocks at the cowl lip is also considered.
Date: January 1956
Creator: Connors, James F. & Meyer, Rudolph C.
Partner: UNT Libraries Government Documents Department

The Detection of Short Circuits in Thermocouples by a Radio-Frequency Measurement of Inductance

Description: Abstract: "The development of a portable battery-operated instrument capable of detecting a short-circuit four or more inches from the hot junction of a five-foot-long thermocouple is described. The accuracy of measurement is inversely proportional to the length of the thermocouple and is not affected by changes in thermocouple temperature. A signal having a wave length much greater than the electrical length of the thermocouple is used to measure thermocouple inductance. The instrument consists of a radio-frequency ocillator, a bridge, five stages of amplification, and a director. Theoretical considerations are presented in support of a radio-frequency measurement."
Date: 1956
Creator: Morris, Peter R.
Partner: UNT Libraries Government Documents Department

The Determination of Thorium in the Presence of Uranium, Titanium and Tungsten

Description: Abstract: "Thorium is separated from uranium, titanium and tungsten by precipitation as fluoride. The precipitate is ignited to oxide, dissolved in nitric acid, evaporated with perchloric acid, neutralized to a pH between 2.0 and 2.5 and titrated with the disodium salt of ethylene-ddiamine tetrascetic acid, using Eriochrome Cyanide as indicator. If less than 30 milligrams of thorium is present, lanthanum is added as a carrier."
Date: 1956
Creator: Willard, Hobart H.; Mosen, Arthur. W. & Gardner, Ross D.
Partner: UNT Libraries Government Documents Department