Resource Type
Collection
Serial/Series Title
Atomic Energy Commission Reports
185
University of California Radiation Laboratory Reports
90
Hanford Works Reports
79
HW (Series)
54
UCRL (Series)
44
Oak Ridge National Laboratory Reports
39
BNL (Series)
24
Brookhaven National Laboratory Reports
24
General Electric Company Atomic Power Reports
24
CF (Series)
19
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Thermal Conductivity of Uranium-Chromium and Uranium-Iron Eutectic Alloys
Report discussing measurements of thermal conductivity and heat capacity for uranium-chromium and uranium-iron eutectic alloys at room temperature. The resulting values were intended for use in design calculations until more accurate data at other temperatures was obtained.
Date:
April 14, 1953
Creator:
McKee, John M., Jr.
Object Type:
Report
System:
The UNT Digital Library
The Thermal Conductivity of Uranium Monocarbide
Uranium carbide shows promise as a fuel material for reactors operating at relatively high temperatures based on its high melting point, high uranium density and high thermal conductivity. Before refined reactor designs can be made, however, good quantitative data on the thermal conductivity at temperatures in excess of 1000C is required. This technical report presents data gathered as part of a continuing study aimed at determining the thermal conductivity of refractory uranium fuels as a function of temperature, density and composition over the temperature range 1000-2200C. At the inception of this program it was felt that an absolute method capable of achieving high temperatures was necessary and that the difficulties encountered in fabricating the large complex specimens needed were justified. The steady state radial heat flow method and apparatus of Rasor and McClelland were therefore chosen. The technical report discusses the experimental equipment and presents results of measurements on three specimens of UC over a temperature range 900 to 1600C. An analysis of the data is made with respect to other physical properties of the material and the measured conductivities are compared with the work of other investigators.
Date:
April 2, 1964
Creator:
Sobon, J. T.; Miller, A. D. & DeCrescente, M. A. (Michael A.)
Object Type:
Report
System:
The UNT Digital Library
Thermal Contact Conductance of Fuel Element nateriasls
Thermal Resistance of the contact between to core and the jackets or unbonded fuel elements may easily be the largest source of error in core temperature predictions. The object of this work is to improve contact conductance predictions by measuring conductance of the joint between reactor fuel and cladding materials at joint pressures, temperatures and thermal flux levels approaching reactor service conditions.
Date:
April 10, 1959
Creator:
Wheeler, Robert G.
Object Type:
Report
System:
The UNT Digital Library
The Thermal Expansion of Thirteen Tungsten Carbide Cermets from 68 to 1800 F
The linear thermal expansion of thirteen tungsten carbide cermets with cobalt binder was investigated experimentally over the temperature range from 68 to 1800 F. Cobalt contents varied from 2.5 to 60 per cent. Several compositions included additions of mixed carbides of titanium, tantalum, and columbium. The experimentally observed coefficients of thermal expansion for the various compositions were compared with coefficients analytically computed from the coefficients for the constituents. Three such analytical methods were evaluated. In one method, the coefficient of expansion of the mixture was computed by volume fractions and in a second method by weight fractions. In the third method, the computation accounted for the stresses set up in the mixture by the difference in thermal expansion of the carbide skeleton and the cobalt binder. The expansions of all these cermets agreed with the values computed by weight fractions or by the stress method within 12 per cent, and by volume fractions within 28 per cent. The cermets containing less than one per cent mixed carbides agreed with the expansion computed either by weight fractions or by stress within 8 per cent, the cermets containing more than five per cent mixed carbides agreed with values computed by volume fractions …
Date:
April 26, 1963
Creator:
Harrington, L. C. & Rowe, G. H.
Object Type:
Report
System:
The UNT Digital Library
Thermal Hydraulic Bases for Selected PRTR Process Specifications
This document presents the bases for those PRTR Process Specifications involving considerations of heat transfer and fluid flow. It will be noted that some of the bases incorporate information gained from laboratory experiments with electrically heated test sections simulating PRTR fuel elements. These experiments are described in some detail elsewhere.
Date:
April 1, 1960
Creator:
Batch, J. M. & Ambrose, T. W.
Object Type:
Report
System:
The UNT Digital Library
Thermodynamics of the Aqueous Ions of Americium
Thesis discussing the heats of reduction, oxidation potentials, and measurements of autoreduction and disproportionation for aqueous ions of americium.
Date:
April 7, 1954
Creator:
Gunn, Stuart Richard
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Thorium oxide Slurry Falling Ball Viscometer : Final Co-op Report, Winter, 1957
A falling ball viscometer under development at ORNL, employing a flow system and an electromagnetically operated dash-pot pump, was evaluated for possible use with aqueous ThO2 slurry systems under reactor irradiation. Interchangeable check valve inserts were designed and fabricated to investigate several pump designs. Magnetic flux concentrations which originally prevented circulation of the ferritic stainless steel viscometer ball through the electromagnetic pump were eliminated by substitution of iron-magnetic stainless steel inserts. Viscosity was correlated through a logarithmic plot of the dimensionless Reynolds number vs. Froude number with the ratio of ball diameter to tube diameter as a parameter. The relation is linear in the laminar flow region.
Date:
April 10, 1957
Creator:
Novak, P. E.
Object Type:
Report
System:
The UNT Digital Library
Time Behavior of Godiva Through Prompt Critical
The transition region between short, but controlled, pile periods and uncontrolled, highly-supercritical conditions has been investigated with an unreflected, spherical uranium assembly (Godiva). This study was undertaken because knowledge of the behavior of supercritical systems is important in evaluation of reactor hazards and also the hazards of less standard operations involving possibly critical quantities of active material.
Date:
April 1956
Creator:
Wimett, T. F.
Object Type:
Report
System:
The UNT Digital Library
The Time-Dependent Neutron Flux for a Pulsed Subcritical Assembly
Report discussing a study regarding the time-dependent neutron flux for a pulsed subcritical assembly. From abstract: "A two-group analysis has been applied to the transient behavior of the thermal flux in a subcritical assembly which has been given a short burst of fast neutrons."
Date:
April 15, 1957
Creator:
Fults, Stanley C.
Object Type:
Report
System:
The UNT Digital Library
Titanium-Uranium System in the Region 0 to 30 Atomic Percent of Titanium
Report discussing an investigation aimed at building information regarding the titanium-uranium system in the uranium-rich region.
Date:
April 1953
Creator:
Buzzard, R. W.; Liss, R. B. & Fickle, D. P.
Object Type:
Report
System:
The UNT Digital Library
Transient Temperatures in Flat Plates
Calculations presented were done to determine what maximum temperature gradients and stresses would be in typical designs of flat thorium plates, 100 mils thick and coolled on both sides by NaK.
Date:
April 6, 1951
Creator:
Hanson, Donald N.
Object Type:
Report
System:
The UNT Digital Library
Transistor Pre-Amplifier for Neutron Monitors
In the past several years the use of neutron monitors for Pu concentration monitoring has been expanded in the Chemical Processing Department. Most of these monitors have been quite successful, and considerable effort is being made to improve the operation of both existing and future monitoring systems. One of the major improvements has been the development and use of a transistorized pre-amplifier or impedance matching circuits. This unit solves several problems associated with the use of boron trifluoride (BF3) neutron detectors in process monitoring; e.g., vacuum tube pre-amp failure because heat is not being conducted away.
Date:
April 20, 1960
Creator:
Kelly, P. R.
Object Type:
Report
System:
The UNT Digital Library
Transition Boiling Heat Transfer Program; Fifth Quarterly Progress Report, January - March 1964
Summary: Tests with the two-rod assembly were performed with liquid film trippers attached to the unheated wall, and a variation in rod spacing. Experimental data and improved high-speed motion pictures have been obtained of transition boiling behavior. The changes of the local heat transfer process between nucleate and film boiling can be readily distinguished i the motion pictures. Observational test performed with very short fins on the heated surface resulted in essentially eliminating transition boiling temperature fluctuations and doubling the film boiling coefficient. These gains were attained without reduction of the critical heat flux
Date:
April 1, 1964
Creator:
Quinn, E. P.
Object Type:
Report
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.
Object Type:
Report
System:
The UNT Digital Library
Ultrasonic Cleaning of Fuel Elements Components
Ultrasonic cleaning uses high-frequency sound waves to induce cavitation within a cleaning, medium. During cavitation, millions of small bubbles form and collapse, resulting in agitation proportional to the energy put into the solution. The making and breaking of these bubbles produce the scrubbing action associated with ultrasonic cleaning.
Date:
April 19, 1960
Creator:
Strand, C. A.
Object Type:
Report
System:
The UNT Digital Library
Uranium Cold Extrusion
Several hollow uranium cores of "C" size I & E diameters were fabricated by cold extrusion (550 to 750 F) at Hunter Douglas Aluminum Corporation. Results show diameter control and reproducibility are excellent. Preferred orientation induced by this process is completely removed by a single standard beta heat treatment.
Date:
April 21, 1959
Creator:
Riedeman, G. W.
Object Type:
Report
System:
The UNT Digital Library
Uranium Hydride : A Survey
The following report discusses the results of a survey that was initiated to ascertain the availability of uranium hydride in tonnage quantities.
Date:
April 10, 1950
Creator:
Kitzes, A. S.
Object Type:
Report
System:
The UNT Digital Library
Urine Assay Procedure at the Mound Laboratory : Final Report
The following report analyzes experiments on urinary samples of personnel who were exposed to radioactive materials. This report describes the procedure employed for this assay, and data to show its performance and reasons for its present course are presented.
Date:
April 14, 1950
Creator:
Spoerl, E. S.
Object Type:
Report
System:
The UNT Digital Library
Use of a Portable Whole-Body Counter to Measure Internal Contamination in a Fallout-Exposed Population
Technical report regarding the evaluation of body burdens of radionuclides in large populations in a large-scale survey.
Date:
April 23, 1962
Creator:
Cohn, S. H.; Conard, R. A.; Guamano, B. A. & Robertson, J. S.
Object Type:
Report
System:
The UNT Digital Library
The Use of Laboratory High Frequency Induction Furnaces
Equations are derived for the rates of heating of objects in induction furnaces and for the maximum temperatures attainable. The equations are primarily useful in designing conducting crucibles, shells, and cylinders so as to increase the power input and decrease heat losses. A very brief treatment is given of the factors which influence the current in the induction coil. The performances of various induction furnaces are compared.
Date:
April 3, 1950
Creator:
Brewer, Leo, 1919-2005
Object Type:
Report
System:
The UNT Digital Library
The Use of Transistors in High Speed Time-to-Height Converters
Abstract. A conventional time-to-height converter operates by charging a capacitor to a voltage proportional to a time interval. To convert short time periods, the circuitry is limited by the stray capacities. A system was designed in which the Vernier chronotron principle is utilized to time scale the input time before time-to-height conversion. Accuracy is also improved over that attainable with conventional systems. The use of transistors is facilitated by the system design.
Date:
April 1960
Creator:
Rufer, Richard P.
Object Type:
Report
System:
The UNT Digital Library
The Validity of the Statistical Theory of Pressure Broadening
The statistical theory of pressure broadening is developed for any interaction law in which the potential energy is inversely proportional to some power of the distance between the molecules, including cases in which the forces change sign. This note is intended to prove two propositions: A. When a spectral line is broadened by single impacts of perturbing molecules and the half-width of the line is delta infinity, the statistical theory of broadening is applicable provided delta infinity . R >> 1. In this criterion T is a time comparable to the interval in which the perturbed traverses a distance equal to the impact parameter. B. Far in the wings of a line the statistical theory is always applicable.
Date:
April 3, 1956
Creator:
Margenau, Henry, 1901-1997
Object Type:
Report
System:
The UNT Digital Library
Values of Resonance Integrals
The following report provides value tables of resonance intervals for various elements and materials.
Date:
April 30, 1952
Creator:
Wilson, E. S.
Object Type:
Report
System:
The UNT Digital Library
Velocity Analyzer
Description of a velocity analyzer (with diagrams) is given. It is a device for measuring the velocities of charged particles which comprises pairs of spaced electrodes, a collector for charged particles, and means for propelling charged particles in a direction so as to pass between the pairs of electrodes. The pairs of electrodes and the collector are so arranged to permit passage of the charged particles between them to the collector plate. Means are provided for applying an alternating substantially square wave potential of known frequency to the pairs of electrodes so that adjacent pairs are opposite in phase and so that one half-cycle of the wave appears as zero potential between the pairs of electrodes.
Date:
April 2, 1947
Creator:
Meecham, W. C.
Object Type:
Report
System:
The UNT Digital Library