Resource Type
Collection
Serial/Series Title
Country
States
377 Matching Results
Results open in a new window/tab.
Progress Report for the Month of December, 1947 : Contract No. W-38-094-eng-27
This report for December, 1947 describes progress in ore dressing and pyrometallurgical studies, chemical work on phosphates, and analytical work.
Date:
December 31, 1947
Creator:
Center, E. J.; Pray, H. A.; Richardson, A. C. & Sullivan, John D.
Object Type:
Report
System:
The UNT Digital Library
Further Studies with the GCRE Critical-Assembly
This report follows ciritical-assembly studies on: the effect on reactivity caused by changes in axial reflector materials; the effect on reactivity and the power perturbation caused by fast safety control-blade guides; the effect of changes in fuel-element material composition; the effect of changes in fuel-elements spacing designed to produce uniform radial power-generation rates.
Date:
December 29, 1958
Creator:
Dingee, David A.; Ballowe, William C.; Egen, R. A.; Jankowski, Francis J. & Chastain, Joel W.
Object Type:
Report
System:
The UNT Digital Library
Delta-Phase Zirconium Hydride as a Solid Moderator
Abstract: "In a study of the preparation and properties of delta-phase zirconium hydride it was found that large, sound bodies of the hydride can be prepared by direct combination of the elements if the rate of the reaction is retarded by limiting the supply of available hydrogen. Specimens up to 1-in. diameter were prepared using this technique. Because delta phase zirconium hydride does not readily form eutectics with iron-and nickel-base alloys below 1800 F these materials may be utilized for clodding the hydride. Delta-phase zirconium hydride is unaffected by exposure to liquid NaK or to nitrogen gas at temperatures below 1000 F. The hot hardness of delta-phase zirconium hydrid is about 130 kg per mm-2 at room temperature and 40 kg per mm-2 at 1500 F. The mean coefficient of thermal expansion (68 to 1337 F) is 6.5 x 10^-6 per deg F. The thermal conductivity varies from 5.7 Btu/(ft)(hr)(F) at 300 F to 5.1 Btu/(ft)(hr)(F) at 1300 F."
Date:
December 18, 1957
Creator:
Vetrano, James B.
Object Type:
Report
System:
The UNT Digital Library
The Cladding of Delta-Phase Zirconium Hydride
Abstract: A study has been made of the cladding of solid and powdered delta-phase zirconium hydride is both red and flat shapes with stainless steel. The program included investigations of metallurgical bonding, both with and without the sore of metallic barrier materials. Types 304 and 347 stainless steel were used for cladding material. The intermediate barrier-layer materials used were niobium, molybdenum, a combination of copper and molybdenum, and a combination of copper and niobium. The pressure-bonding techniques, involving the use of gas pressure at elevated temperatures, was employed in this study. Variable times and temperatures with a constant pressure of 10,000 poi were utilized by produce bonding. In this study, the best results were archived is cladding delta-phase zirconium hydride directly with Types 304 or 347 stainless steel. Good bonds were obtained by pressure bonding at 1600 F for 3 or 4 hr subsequent to pressure bonding at 1900 F for 1 to 2 hr at a pressure of 10,000 poi. Partial bonding was achieved between niobium and zirconium hydride and molybdeum and girconium hydride.
Date:
December 27, 1957
Creator:
Paprocki, Stan J.; Hodge, Edwin S. & Boyer, Charles B.
Object Type:
Report
System:
The UNT Digital Library
Experimental Rolling of Uranium : Lackawanna No. 3
The following report is one of a series of rolling tests to establish the rolling process for Feed Materials Production Center at Fernold, Ohio. The primary objective of this program is to find a mechanically feasible process for continuous rolling of uranium.
Date:
December 13, 1951
Creator:
Riches, J. W.
Object Type:
Report
System:
The UNT Digital Library
Supplement to Document HW-21374 -- Multiplication Constants for Hanford Type Lattices: Graphite of Variable Density
Report discussing "the effect on the multiplication constant of using graphite of various density." Results are tabulated and plotted.
Date:
December 28, 1951
Creator:
Dahlberg, Richard C.
Object Type:
Report
System:
The UNT Digital Library
The Valve-Actuated Pulse Column Design and Operation
The following report describes a countercurrent extraction column, which employs timed solenoid valves and pressurized feeds to provide a pulsing action to disperse the phases. This report further describes the 4-stage cycle of the column operation.
Date:
December 3, 1951
Creator:
Burger, L. L.
Object Type:
Report
System:
The UNT Digital Library
Physical Properties of the System Uranyl Nitrate - Aluminum Nitrate - Nitric Acid - Water - Hexone: Part 6. Distribution Coefficients of Plutonium(IV) Nitrate
Report discussing the properties of plutonium and plutonium's distribution between hexone and aqueous phases, which relates to the function of Redox plants
Date:
December 1, 1950
Creator:
Groot, C.; Rehn, I. M. & Slansky, C. M.
Object Type:
Report
System:
The UNT Digital Library
Corrosion of Stainless Steel Type 309SCB in 200 Area Dissolver Solution Containing Mercuric Ion
The following report provides data from corrosion tests meant to evaluate the performance of Type 3098Cb stainless steel in BiP04 process dissolver solution containing mercuric ion.
Date:
December 20, 1951
Creator:
Sanborn, K. L.
Object Type:
Report
System:
The UNT Digital Library
Field Handling Study of Heavy Aggregate Concrete
Purpose: "This test was conducted to gain information and experience in the handling of heavy aggregate concrete. The results from this test were to establish procedures for a subsequent program -- "Construction Test of High Density Concrete Shielding.""
Date:
December 7, 1951
Creator:
Emmons, C. D.
Object Type:
Report
System:
The UNT Digital Library
Short Time Corrosion Tests of Bronze, Mild Steel, T-304 Stainless Steel and 2S Aluminum in 10% Potassium Tetraborate Solution
Report summarizing corrosion tests meant to determine the corrosion rates of bronze, mild steel, T-304 stainless steel and 2S aluminum in 10% potassium tetraborate solution. Tests were completed under the boiling point of each solution except for 2S aluminum, which was tested at 40C, the approximate temperature in a pile.
Date:
December 14, 1951
Creator:
Katayama, Y. B.
Object Type:
Report
System:
The UNT Digital Library
Densitometric Determination of Iron in Plutonium
"The attached report summarizes the work performed in the establishment of an improved spectrographic method for determining iron in plutonium."
Date:
December 20, 1951
Creator:
Daniel, J. L.
Object Type:
Report
System:
The UNT Digital Library
Analytic Approach for the Pion-Proton Scattering Phase Shifts
A simple method of solving for the phase shifts of the pion-proton scattering is presented. The rapid solution afforded can be utilized, as the Ashkin diagrams have been employed, to give starting values to an electronic computer or alternatively to analyze with more ease the variation of the phase shifts as a function of the input data in terms of the coefficients of the angular distributions. A new plot of a function of the total cross section versus the pion energy is introduced. The nearly straight line resulting should help to evaluate the experimental data.
Date:
December 7, 1955
Creator:
Rarita, William, 1907-
Object Type:
Report
System:
The UNT Digital Library
Flotation Characteristics of Florida Phosphate Leached-Zone Material, Progress Report No . 7
Although the results reported herein are rather encouraging and show the possibilities of utilizing flotation to increase recoveries and in some instances grades, they should not not be considered an optimum. As stated previously, time did not permit a detailed investigation of all reagents an conditions to obtain maximum grades and recoveries, but sufficient data, with enough typical samples, have been obtained to indicate a definite trend and encouragement for further studies. A comparison of the flotation results obtained with each of the samples is presented in Table 2.
Date:
December 20, 1955
Creator:
Snow, Robert E. (Robert Ellis)
Object Type:
Report
System:
The UNT Digital Library
Progress Report. Part I. [Isotope Encephalometry]. Part II. Progress and Plans in the Development of a Scanning Scintillation Coincidence Isotope-Encephalometer
Sixty-nine cases of suspected brain lesions were studied with both routine isotope encephalometry and the graphic method of analysis. Of thirty-two space occupying lesions, 68.7% were correctly diagnosed by both means, while 18.8% were negative with the routine method but were positive with the graphic method. The overall accuracy of locating a tumor when present was 87.5%. The proposed design for a scanning scintillation coincidence isotope-encephalometer is discussed.
Date:
December 1955
Creator:
French, Lyle A.
Object Type:
Report
System:
The UNT Digital Library
Reference Electrodes
"The problems discussed are those encountered in assigning unequivocal emf values to electrode systems. Three electrodes which meet the requirements for reference electrodes most adequately are considered in some detail: these are the hydrogen, silver-silver chloride, and mercury-mercurous chloride (calomel) electrodes. An assessment is presented for electrode systems for aqueous solutions, organic solvents, fused slats and biological systems."
Date:
December 1962
Creator:
Janz, George J. & Kelly, Frank J.
Object Type:
Report
System:
The UNT Digital Library
Survey of Non-Aqueous Conductance Data
"A compilation made as part of a research program dealing with the thermodynamics and electrical conductance of inorganic electrolytes in polar organic solvents is presented. Conductance and association constant data are included dating from 1922 through June 1962, classified both by solute and solvent. Other features include a selection of the physical properties of the most commonly-used organic solvents, a guide to alkylammonium salts studied in four or more solvents, and a survey of conductance extrapolation techniques."
Date:
December 1962
Creator:
Janz, George J.; Kelly, Frank J. & Venkatasetty, H. V.
Object Type:
Report
System:
The UNT Digital Library
Boiling Burnout Newsletter No.1
Preliminary data are enclosed in Tables I, II, II, IV, V, and VI. Tables I to V are data for round nickel tubes in a vertical and inclined (45°) position. Table VI contains some preliminary data for nickel rectangular channels (0.060" and 0.050" spacings) in a vertical position.
Date:
December 1, 1954
Creator:
Rickard, Corwin L.
Object Type:
Report
System:
The UNT Digital Library
An Investigation of Scaling of Zirconium at Elevated Temperatures : Quarterly Status Report No. 10; Sept. 2, 1955 to Dec. 2, 1955
As previously reported, zirconium undergoes large dimensional increases after scaling in air in a critical temperature range, 700 degree-1050 degree C. This finding was observed with specimens of a constant thickness (0;062 in.) To study the thickness effect, a number of specimens ranging in thickness from 0.020 to 0.200 in. were scaled in air at a temperature (900 degree C) where the growth is a maximum for a given time. Both cold rolled iodine sheet and forged iodide bar stock were used. to determine the effect of orientation, specimens from the forged bar were obtained such that the scaling surface was either parallel to or perpendicular to the long axis of the bar.
Date:
December 8, 1955
Creator:
Barrett, Charles A.; Evans, E. B. & Baldwin, W. M., Jr.
Object Type:
Report
System:
The UNT Digital Library
Level and Leak Indicators
The following report provides results taken from a sodium level indicator developed at Sacandaga using electrical resistance as the principle.
Date:
December 20, 1949
Creator:
Vandenberg, L. B.
Object Type:
Report
System:
The UNT Digital Library
Radiation Problems of the Chemical Plant
"Absorption measurements have been made in a large body of water to evaluate the contribution to the radiation intensity produced by the degradation of radiation without absorption. Radiation intensities three times those expected from a simple exponential absorption were found. Scattering from the air of gamma radiation has been measured and has been found to agree satisfactorily with theoretical predictions. The penetration of radiation through curved pipes in shielding has been measured and been found to be a flat topped function. A 2" pipe bent in the arc of a circle of 7' chord and a 10' radius gives a reduction intensity over the intensity in air at the same distance of 2.5X10⁴."
Date:
December 12, 1942
Creator:
Borst, Lyle B. & Wollan, Ernest Omar
Object Type:
Report
System:
The UNT Digital Library
Freezing Point Diagram and Liquid-Liquid Solubilities of the System Uranium Hexafluoride-Hydrogen Fluoride
Abstract: "The complete freezing point diagram for the system uranium hexafluoride-hydrogen fluoride has been determined. In addition, liquid-liquid solubilities of these compounds have been measured up to the consolute temperature of 101 C. A miscibility gap starts at 61.2 C. over the compositions range 10 to 80 mole per cent uranium hexafluoride. The lowest melting point of this binary system under its own pressure, i.e. the eutectic, is -85 C."
Date:
December 28, 1952
Creator:
Rutledge, Gene P.; Jarry, Roger L. & Davis, W., Jr.
Object Type:
Report
System:
The UNT Digital Library
The Electrical Conductivity of Uranyl Sulfate and Uranyl Fluoride in Aqueous Solution
The following report records the investigation of the conductivity of uranyl sulfate and uranyl fluoride in aqueous solution at several temperatures and in various concentrations."
Date:
December 1952
Creator:
Brown, Robert D.; Bunger, W. B.; Marshall, W. L. & Secoy, C. H.
Object Type:
Report
System:
The UNT Digital Library
Dissolution of NaK
Abstract: "A rapid yet safe method for the dissolution of sodium-potassium alloys prior to chemical or instrumental analysis has been devised. The alloy is submerged beneath the surface of an inert organic reagent and dissolved at a controlled rate by adding methanol drop-by-drop. A blanket of inert gas is maintained over the reaction flask. The procedure has been successfully used to dissolve samples of NaK in the range of 0.05 to 25 grams."
Date:
December 2, 1952
Creator:
White, J. C.; Talbott, C. K. & Brady, L. J.
Object Type:
Report
System:
The UNT Digital Library