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  Partner: UNT Libraries Government Documents Department
 Decade: 1940-1949
Casting Uranium Bars as a Substitute for the Extrusion Process

Casting Uranium Bars as a Substitute for the Extrusion Process

Date: January 1, 1945
Creator: Lindlief, W. Earl
Description: The usual method of producing uranium slugs for the reaction pile is to cast the metal into billets which are extruded into rod about 1.45 inches in diameter. Slugs are then machined from this to the final size of 1.359 inches in diameter by 8 inches long. Extrusion is done in the gamma range at a temperature of about 1000 C, where the metal is soft enough to be extruded at relatively low pressures. This operation is difficult and expensive and the product is not entirely satisfactory. The billets must be protected from oxidation during heating and extruding and the extruded rod must likewise be protected during cooling. Loss of metal due to oxidation is appreciable and a relatively large amount of scrap is produced. The production of dies suitable for use at the high temperatures involved is troublesome. The extruded rod must be straightened before machining and frequently contains stringers of oxide and voids or other internal defects.
Contributing Partner: UNT Libraries Government Documents Department
Progress Report No. 69. Dec. 15, 1948 to Jan. 15, 1949

Progress Report No. 69. Dec. 15, 1948 to Jan. 15, 1949

Date: January 30, 1949
Creator: Authors, Various
Description: This is the progress report for the University of California, Radiation Laboratory for December 15, 1948-January 15, 1949. It discusses the following: (1) Bevatron; (2) 184-inch Cyclotron Program; (3) 60-inch Cyclotron Program; (4) Synchrotron Operation; (5) Linear Accelerator and Van de Graaff Operation; (6) Experimental Physics; (7) Theoretical Physics, (8) Isotope Separation; (9) Chemistry Departments; (10) Medical Physics; and (11) Health Physics and Chemistry.
Contributing Partner: UNT Libraries Government Documents Department
Report of Committee, Liquid Process Waste Disposal and Reclamation

Report of Committee, Liquid Process Waste Disposal and Reclamation

Date: October 7, 1948
Creator: unknown
Description: None
Contributing Partner: UNT Libraries Government Documents Department
The Distribution of Impurities in the Ether Extraction Process

The Distribution of Impurities in the Ether Extraction Process

Date: January 22, 1947
Creator: Brimm, E. O., Dr. & Mohr, P
Description: When uranium is purified by the ether extraction method, black oxide is dissolved in nitric acid and ether is added; an ether layer containing uranium and an aqueous layer containing uranium and impurities are obtained. The distribution of some impurities between the two phases and the effect of such impurities on the extraction process were studied. the processing required in the preparation of pure uranyl nitrate might be decreased if, instead of uranosic oxide, sodium diuranate was used as a source of uranium. If it is assumed that uranosic oxide contains the same amounts of impurities as sodium diuranate, with the exception of soda, the extraction of soda by the wash of an ether solution of nitrate prepared from diuranate would be the criterion of suitability of sodium diuranate. The distribution and effect of sodium in the extraction process was therefore investigated, and the results are described in this report. For various of the impurities, the distribution in the process and the effect on uranium holdup in the insoluble cake was investigated. Particular attention was given to the behavior of boron, vanadium, chromium, and molybdenum.
Contributing Partner: UNT Libraries Government Documents Department
Experiments to Test the Validity of the Linear R-Dose/Mutation Frequency Relation in Drosophila at Low Dosage

Experiments to Test the Validity of the Linear R-Dose/Mutation Frequency Relation in Drosophila at Low Dosage

Date: January 1, 1947
Creator: Spencer, W.P. & Stern, C.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Comparison of Normal Process and Single Process (XC) Uranium

Comparison of Normal Process and Single Process (XC) Uranium

Date: October 7, 1946
Creator: Cleaves, H. E.
Description: Certain difficulties have been encountered in attempts to substitute a 'one-step' casting process, developed at Iowa State College, for the 'normal' process generally used for the production of extrusion billets. In the 'one-step' process molten metal is delivered from the reduction bomb to the billet mold instead of allowing the metal to solidify in the bomb with subsequent vacuum remelting of the biscuit metal before casting in the billet mold. Routine analyses had failed to establish significant differences in the composition of normal and one-step metal. The one-step billets had been extruded satisfactorily, and finished slugs were prepared and subjected to the usual canning operation. In subsequent tests however, it was found that a large percentage of the canned slugs were badly defective. An investigation was requested to determine the differences in composition or structure of the X-C and normal metal which would account for the failure of the X-C slugs. Samples of the failed slugs and of metal from various stages of both the one-step and normal processes were supplied by Madison Square Area, for comparison on the basis of analyses, microstructure, or such other tests as seemed desirable.
Contributing Partner: UNT Libraries Government Documents Department
The Isolation and Properties of Curium

The Isolation and Properties of Curium

Date: August 1, 1948
Creator: Werner, Louis B.
Description: The isolation of curium, element number 96, in relatively pure form has been accomplished. A method, involving a solvent extraction process, is given for the purification of americium from lanthanum and other ions. The discovery of a higher oxidation state of americium led to a method of separating americium from curium. Separation of the two elements was also accomplished by use of ion exchange resins. The details of the isolation of curium are given; the results of the spectrographic analysis, specific activity measurement, and calorimetric determination of half life showed the curium to be relatively pure. The absorption of light of various wave-lengths by an aqueous solution of Cm(III) is described, and some physical effects of the radiation from the curium are noted.
Contributing Partner: UNT Libraries Government Documents Department
Master-Slave Manipulator

Master-Slave Manipulator

Date: March 7, 1949
Creator: Goertz, R.C.
Description: A device for manipulating a pair of tongs behind a shielding barrier has been built and tested. It is called a Master-Slave Manipulator because the slave tongs move in exact correspondence with a master handle. The "slave hands" follow the master hands in complete synchronism. This is the first completely master-slave manipulator known to exist and has proved that this type of manipulation is very successful when the unit is prooperly engineered and built.
Contributing Partner: UNT Libraries Government Documents Department
Cloud Chamber: Heat Shielding, Magnet Shielding

Cloud Chamber: Heat Shielding, Magnet Shielding

Date: 1946
Creator: Hering, D.
Description: Technical drawing of a cloud chamber and ionization chamber for use in nuclear reactors.
Contributing Partner: UNT Libraries Government Documents Department
Cloud Chamber: Camera Lights Assembly

Cloud Chamber: Camera Lights Assembly

Date: 1946
Creator: Hering, D.
Description: Technical drawing of cloud chamber and ionization chamber for use in a nuclear reactor.
Contributing Partner: UNT Libraries Government Documents Department