Resource Type
Serial/Series Title
296 Matching Results
Results open in a new window/tab.
The Uranium-Rhenium Alloy System
Abstract The phase diagram of the uranium-rhenium alloy system is presented along with a discussion on transformation kinetics of the uranium solid solutions. The phase diagram is of the double eutectic type with the intermediate phase having the composition URe2. This phase exhibits allotropy at 180°C and melts congruently at 2200°C. URe2 reacts sluggishly with the uranium solid solutions below 750°C to form the peritectoid compound U2Re. Eutectic reactions occur at 1105° and 2105°C at respective compositions of 10.5 and 65.5 wt. % Re. Eutectoid reactions occur at 643° and 681°C at compositions of 1.4 and 6 wt. % Re, respectively. The maximum solubility of rhenium in α uranium is about 0.4 wt. % at 643°C and in β uranium is 1.9 wt. % at 681°C. The solubility of rhenium in γ uranium is 6 wt. % at 681°C and increases to about 7 wt. % at 975°C. The solubility of uranium in rhenium is 0.6 wt. % at room temperature with little variation up to 2000°C. Alloys of β and γ uranium containing more than about 1.2 and 7 wt. % Re respectively, can be readily supercooled to room temperature. Rapid cooling of γ alloys containing less than about …
Date:
January 14, 1963
Creator:
Jackson, R. J. (Robert James), 1929-; Williams, D. E. & Larsen, W. L.
System:
The UNT Digital Library
Thermodynamics of Formation of ThMg2
Literature review on the discovery, experiments on, and applications of the compound ThMg2.
Date:
January 1963
Creator:
Novotny, D. B. & Smith, J. F.
System:
The UNT Digital Library
The Solubility of Holmium in Copper, Silver, and Gold
From Abstract: "The solid solubility of holmium in copper, silver, and gold was determined using metallographic techniques. The composition of the first intermetallic compound in these systems was found to be Cu4Ho, Ag7Ho2, and Au3Ho. These compounds form eutectics with the solvent metals which melt at 868, 787, and 778°C respectively."
Date:
January 1963
Creator:
Wunderlin, W. J.; Beaudry, B. J. & Daane, A. H.
System:
The UNT Digital Library
A Proposal for the Mc2 Isochronous Cyclotron: A General Purpose High-Intensity 810-MeV Proton Accelerator
Abstract: "The Oak Ridge National Laboratory proposes to build an isochronous eight-sector proton cyclotron to provide an extracted beam in excess of 100 A at 810 MeV. The primary proton beam and the secondary meson and neutron beams will be used to investigate nuclear structure, and the interactions between elementary particles. Biomedical and Space-oriented research programs are also planned. Shielded research areas and an extensive beam transport and analysis system are provided. Theoretical and experimental studies have shown that the Mc2 Cyclotron is a practical concept; high extraction efficiencies can be obtained, and the residual radiation problems are manageable. The project would require less than seven years to complete, and would cost about $43,000,000."
Date:
November 1, 1963
Creator:
Oak Ridge National Laboratory
System:
The UNT Digital Library
Carolinas Virginia Tube Reactor: Large Plant Study
From introduction: The Carolinas Virginia Tube Reactor is to be designed as a prototype for a large-scale plant of about 200 megawatts electrical or larger, wherein operation with natural uranium feed material may be feasible but such feed material can only be considered if it is the more economical.
Date:
June 1963
Creator:
Westinghouse Electric Corporation. Atomic Power Division.
System:
The UNT Digital Library
Final Summary Report of the Gas-Cooled Reactor Experiment-1
Report describing the Gas-Cooled Reactor test facility, its ongoing testing and evaluations of a test reactor, and its operating conditions and characteristics.
Date:
October 1963
Creator:
Chesworth, R. H.
System:
The UNT Digital Library
Mechanical Properties of Zircaloy-2 - Niobium - Oxygen Alloys
Introduction: The effects of temperature on the mechanical properties of Zircaloy-2 containing up to 7.5 wt % niobium and 3500-ppm oxygen were studied and are presented herein.
Date:
January 15, 1963
Creator:
Bibb, A. E. & Fascia, J. R.
System:
The UNT Digital Library
Radioactivity Transport in Water: the Dispersion of Radionuclides in Open Channel Flow
From introduction: It is the purpose of this study to present field measurements of dispersion in a river and a canal, whose characteristics are unlike streams in which similar work has been done. The Colorado River and the Pierce Canal were selected for testing.
Date:
June 1, 1963
Creator:
Patterson, Calvin Clyde & Floyna, Earnest F.
System:
The UNT Digital Library
Experimental Gas Cooled Reactor, Final Hazards Summary Report: Volume 2, Plant Operation
From introduction: The information provided in Volume II describes programs, requirements, and procedures established by the Operator to minimize the probability of equipment failure, actions taken during any emergency to minimize radiation exposure dose to the general public and to plant personnel, and actions taken following a hazardous condition to prevent its recurrence.
Date:
August 1, 1963
Creator:
unknown
System:
The UNT Digital Library
Critical Experiments on Slightly Enriched Uranium Metal Fuel Elements in Graphite Lattices
Abstract: A series of clean critical experiments was performed in the SGR critical facility utilizing 2 wt % enriched, uranium metal, hollow cylinder, fuel elements, in AGOT graphite moderator.
Date:
June 30, 1963
Creator:
Campbell, R. W.; Doyas, R. J.; Field, H. C.; Guderjahn, C. A.; Guenther, R. L.; Hausknecht, D. F. et al.
System:
The UNT Digital Library
Boiling Studies for Sodium Reactor Safety: Part 1, Experimental Apparatus and Results of Initial Tests and Analysis
Abstract: An experimental and analytical research program is described which is designed to meet certain specific needs for data and methods required to make improved predictions of transient voids, burnout, flow, and fuel temperature during extreme accidents in sodium-cooled reactors.
Date:
August 30, 1963
Creator:
Noyes, R. C.
System:
The UNT Digital Library
Stratospheric Monitoring Program
"The performance of the Model I electrostatic precipitator sampler in recent field and laboratory tests is described and discussed. Two of the four precipitator-bearing balloon flights during this interval reached the floating altitude of approximates 105,000 feet, and the precipitator operated efficiently on both. One sample was collected at the nominal design flowrate of approximates 100 cfm, and the second at approximates -200 cfm. Comparison of the deposition profiles of the stratospheric samples with those obtained under controlled conditions in the altitude chamber indicates that the field samples were collected with >90% efficiency. The laboratory tests also showed that the performance capability of the precipitator improves with increasing precipitator current, and with increasing altitude. One of the above balloon flights carried two Model A-I altimeters with recorder outputs. The two records were identical within plus or minus 250 feet. In addition, variations in altitude indications were consistent with the less sensitive aneroid barocoder measurements from the same flight. A revised Model A-I altimeter with a telemeterable output signal has been designed and constructed. The frequency of the signal is a function of the altitude. A preliminary design concept for a flowmeter with negligible flow resistance is described. It would utilize …
Date:
September 18, 1963
Creator:
Cravitt, S.; Lippmann, M.; Lilienfeld, P. & Viggiano, J.
System:
The UNT Digital Library
Stratospheric Monitoring Program
"Results of the continuing stratospheric flight test evaluation program for the Del Model I Electrostatic Precipitator Sampler and the Del Electrical Discharge Altimeter are described and discussed. Only one of four balloon launches reached floating altitude. The altimeter obtained an altitude recording consistent with concurrent aneroid barocoder readings. The reported gross gamma concentration for the precipitator sampler was approximates 25 and 80% higher than those of the two simultaneous direct flow filter samples. The completion of the design and construction of two prototype units of the Del Electrical Discharge Altimeter and their laboratory evaluation are described. A preliminary design concept is presented for an operational high volume electrostatic precipitator sampler to operate with high collection efficiency at an ambient flowrate of 500 cfm throughout the altitude range 100,000 to 150,000 ft."
Date:
March 15, 1963
Creator:
Cravitt, S.; Lilienfeld, P.; Foldes, A. & Lippmann, M.
System:
The UNT Digital Library
Stratospheric Monitoring Program
"Design work was completed and construction initiated on a prototype field altimeter based on the gas density dependence of Townsend discharge current in an electrical discharge. The design of an ion tracer air velocity meter for laboratory applications, and construction of three units were successfully completed. Theoretical and experimental support is presented, showing the applicability of the ion tracer system to the accurate measurement of linear gas velocity. The operating range of the laboratory meter is 150 to 2500 ft/min at ambient pressures between 200 mu and 30.0 mm Hg. Further investigations on the application of the ion tracer concept to flowrate measurements are presented. By generating velocity profile curves with an ion tracer calibrated thermoanemometer, it was possible to determine the flowrate for 2 flow and pressure conditions; 37.5 cfm at 19.6 mm and 75 cfm at 9.8 mm Hg. Comparison with a calibrated Rotameter technique was within 5% in both cases. Also presented are some preliminary investigations leading to the development of a generalized ion tracer flowmeter for low gas densities. Results of some supplemental electrical discharge experiments in rarefied atmospheres are described. It was observed that electrical oscillations could be produced in a low density gas discharge, …
Date:
January 13, 1963
Creator:
Cravitt, S.; Lilienfeld, P. & Foldes, A.
System:
The UNT Digital Library
In-Core Instrumentation Development Program Quarterly Progress Report June - September 1963
Introduction: The objective of Project Agreement 22 is to determine the feasibility of covering the complete reactor neutron flux start range from 10(3) - 5 x 10(13) nv by using in-core chambers. The counting mode of operating will be used at low neutron fluxes and the root mean square voltage fluctuation mode will be used at high neutron flux levels. Experiments have been run utilizing various ion chambers, gases, gas pressures, voltage, and cables to measure sensitivities and range operating in the counting and RMS voltage modes. Theoretical discussions are presented showing how the RMS voltage is related to individual pulse at both amplifier input and output. Noise is also compared at amplifier output so that the optimum bandwidth can be selected. Spectral shifts with changes in applied voltage causing signal variations have been examined and can be eliminated by appropriate selection of amplifier bandwidth. In the counting mode, all experiments have been conducted with unterminated cable. The chamber has been designed with geometry, gas, and pressure to completely stop fission fragments in the gas and hence maximize the charge generated in the chamber. Cables have been selected to minimize capacity. Various gases, pressures, and voltages have been used to …
Date:
October 1963
Creator:
DuBridge, R. A.
System:
The UNT Digital Library
Program for the Development of Plutonium Recycle for Use in Light Water Moderated Reactors Quarterly Progress Report: July 1 - September 30, 1963
A research program is being conducted to obtain experimental data in the irradiation of plutonium-enriched fuel to confirm a theoretical model for predicting isotopic composition and reactivity changes in plutonium-enriched, light-water-moderated reactors. Quarterly progress: The densitometry procedure (for measurement of alpha autoradiographs of fuel pellets) has been modified to eliminate the need for a second emulsion. The existence of a problem of latent image fading and non-reciprocity of the high-resolution emulsion has been recognized. A tentative procedure has been worked out to correct these emulsion difficulties. the number of polished pellets has been increased to thirteen. The number of hot spots per pellet has not changed appreciably. The largest spot seen is irregular with an estimated volume equivalent to that of a sphere of 35 mil diameter with a PuO2 concentration in the neighborhood of 60%. The VBWR irradiation run now under way is not scheduled to end until October. To the end of the last run the cumulative exposure reached 3703 MWD/T, as logged by VBWR operating personnel. Applying the same scale factor between logged exposure and Ce-Cs analysis of the first fuel sample gives a corrected exposure of 4416 MWD/T. Further debugging of EPITHERMOS, the epithermal extension of …
Date:
October 15, 1963
Creator:
Robkin, M. A.
System:
The UNT Digital Library
Radium and Mesothorium Poisoning and Dosimetry and Instrumentation Techniques in Applied Radioactivity
"The study of the toxicity of Ra and MsTh(Ra/sup 228/) in humans was continued. Several Thorotrast cases were also examined. Physical and clinical studies were made on 151 persons. In all cases possible gamma ray measurements were made of Ra and MsTh decay products retained in the body, alpha -ray measurements of Rn and Rn/sup 220/ in breath, a complete medical history was taken, a complete x-ray examination was made of the skeleton, and urinalysis, hematological, and blood chemistry studies were made."
Date:
May 1963
Creator:
Evans, Robley D.
System:
The UNT Digital Library
Beta-Gamma Circularpolarization-Correlation of Sc46 and its Chemical Origins
Appendix I, Determination of random coincidence in a fast-slow coincidence circuit; Appendix II, Multiple scattering during measurements of S-directional distribution from polarized nuclei, of S-y-circular polarization correlation, and of S-y-directional correlation.
Date:
1963
Creator:
Daniel. H.
System:
The UNT Digital Library
The Heats of Reaction of Lanthanum Perchlorate Solutions with Perchloric Acid and with Hydrogen Halides
The present paper is devoted to the determination of the heats of reaction of lanthanum ions with halogen ions within a broad concentration range of hydrogen halides. The enthalpies of the interaction of lanthanum perchlorate with perchloric and halogen acids increase with the increasing of acid molality from one to eight. The enthalpies of the interaction between lanthanum and halogen ions in water solutions are endothermic and decrease in the sequence; Cl > Br > J. The values support the fact of formation of lanthanum chloride complexes and point to the possibility of forming bromide complexes, but the question of the existence of iodide complexes of lanthanum in aqueous solutions is left open.
Date:
1963
Creator:
Latysheva, V. A. & Kozachenko, N. I.
System:
The UNT Digital Library
Yankee Core Evaluation Program Quarterly Progress Report: July-September 1963
From introduction: The potential of this study as a basis for the evaluation of reactor core design methods is very great. It represents the first opportunity of its kind in relation to the design of low enriched, uranium fueled, light water moderated reactors. Sufficient information should be available to obtain a good fit between the experimental results and a combination of basic physical data and computer programs. The degree of accuracy of this fit will be evaluated. This information will permit a realistic estimate of the uncertainty in future design studies attributable to inherent deficiencies in the design computational methods. In addition, a detailed study of the results undoubtedly will permit improvements in the analytical model. As a final consequence, many ambiguities in reactor economics, due to uncertainties in power capability as a function of time and in the conversion ratio, should be eliminated.
Date:
October 1963
Creator:
Chajson, L.
System:
The UNT Digital Library
Secondary Missiles Generated by Nuclear-Produced Blast Waves
Report from Operation Plumbob regarding an experiment investigating secondary missiles created by blast waves from nuclear detonations of three different yeilds.
Date:
October 28, 1963
Creator:
Bowen, I. Gerald; Franklin, Mary E.; Fletcher, E. Royce & Albright, Ray W.
System:
The UNT Digital Library
Protection Against Fallout Radiation in a Simple Structure
A reinforced Butler building was exposed to fallout from Shots Diablo and Shasta, and the resulting dose rates and fallout deposition inside and outside the structure were measured with various instruments and techniques. Protection factors and roof and ground contributions to the total dose rates at points within the structure were determined from the measurements. Comparisons were made with the results of theoretical and other experimental studies. Information obtained from this experiment should be of value as basic experimental data for fallout protection work, although it is recommended that additional substantive data obtained under more controlled conditions.
Date:
August 12, 1963
Creator:
Breslin, A. J.; Loysen, P. & Weinstein, M. S.
System:
The UNT Digital Library
Tables of Explicit Eigenfunctions for the Reductions 8 x 8, 10 x 8, 10 x 10 and 10 x 10 for the Group SU3
None
Date:
April 1963
Creator:
Tarajanne, Pekka
System:
The UNT Digital Library
Transition Boiling Heat Transfer Program; First Quarterly Progress Report, February - March 1963
Introduction: The Transition Boiling Heat Transfer Program is sponsored jointly by the USAEC and Euroatom and is being conducted by the General Electric Company. The work commenced on this program February 11, 1963. The objective of this program is to perform basic investigation and measurement of the transition boiling regime in high pressure bulk boiling water flows, with particular emphasis i the high range of steam qualities.
Date:
April 15, 1963
Creator:
Tippets, F. E.
System:
The UNT Digital Library