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Critical Experiments For Reactor Physics Studies

Description: The thermal value of Eta for U233 and U235 has been determined in a series of experiments involving direct comparison of the critical parameters of unreflected homogeneous aqueous solutions of the two isotopes Auxiliary experiments establishing limits of error, testing certain aspects of the theoretical model employed, and experimentally determining the parameters in the critical equation, have been performed.
Date: September 16, 1960
Creator: Gwin, R. & Magnuson, D. W.
Partner: UNT Libraries Government Documents Department
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Calculated Thermal Ionization And Enthalpy of Hydrogen, Nitrogen, And Argon At One Atmosphere Pressure In The 298-20, 000'K Temperature Range

Description: The degree of dissociation and ionization and the enthalpies of hydrogen and nitrogen, and the degree of ionization and the enthalpy of argon are calculated for one atmosphere pressure and temperatures up to 20,000'K. All three gases are more than 93% ionized at 20,000'K, and have enthalpies ranging from 553 kcals for argon to 1074 and 1225 kcals, respectively, for hydrogen and nitrogen.
Date: September 15, 1960
Creator: Bond, Walter Dayton
Partner: UNT Libraries Government Documents Department
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Solution of the Monoenergetic Boltzmann Equation in an Infinite Homogeneous Nonmultiplying Medium with Linearly Anisotropic Scattering and Isotropic Plane Source

Description: The solution of the monoenergetic Boltzmann equation in an infinite homogeneous, nonmultiplying medium with linearly anisotropic scattering and an isotropic plane source is given and compared with the corresponding solution for isotropic scattering. The effective source strength for the asymptotic flux turns out to be the same as that for isotropic scattering to first order in Σa/Σ.
Date: September 6, 1960
Creator: Inonu, Erdal
Partner: UNT Libraries Government Documents Department
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Preliminary Analog Computer Study of the Small EGCR In-Pile Loops

Description: The ORNL analog computer was used to simulate four widely different experiment conditions in the small EGCR in-pile loops. Various control and safety systems were evaluated in each case. Curves are included which show the response to postulated accidents and component failures. The results indicate that one standard control and safety system will probably be adequate for a wide variety of test conditions.
Date: September 21, 1960
Creator: Ball, S. J. & Beasley, E. G.
Partner: UNT Libraries Government Documents Department
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Thermal Characteristics of Fluid Flow in Pipes

Description: An investigation is made to determine the adequacy of presently used analog circuits in solving dynamic fluid flow heat transfer equations. A mathematical analysis is made of dynamic heat transfer in pipes with zero losses, with losses proportional to pip temperature, and with heat inputs. The results of this analysis are compared with analog results by means of generalized temperature versus time graphs. The analog circuit is found to be adequate for most conditions, but sometimes requires mod… more
Date: September 13, 1960
Creator: Hinton, D. B.
Partner: UNT Libraries Government Documents Department
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Ion Energy Distribution, Energy Degradation, and Exponentiation Criteria in a Plasma Formed by Beam Trapping and Charge Transfer

Description: An approximation is derived for the time constant which characterizes the rate of energy loss of fast ions moving through a plasma. Using particle and energy-balance equations a simple approximate criterion is derived for the estimation of the importance of energy degradation during plasma buildup in a DCX type machine. Next, there is derived the steady-state ion energy distribution for a case in which energy losses are to electrons at a given temperature and particle losses are by charge excha… more
Date: September 30, 1960
Creator: Rose, D. J.
Partner: UNT Libraries Government Documents Department
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Use of the DD2 Amplifier with the RIDL 200-and 400-Channel Analyzers

Description: The use of the DD^3 amplifier with the RIDL 200- and 400-channel analyzers has been found advantageous for certain applications. In order to use the DD2, certain modifications to the input circuits of the Analog-to Digital Converter Unit are necessary. In addition, the modifications improved the linearity of the analyzer in the low channels. Using the analyzer with the RIDL Type 30-7 Scintillation Pulse Amplifier, it was noted that non-linearity of as much as 5 or 6 channels was present below c… more
Date: September 23, 1960
Creator: Todd, H. A. & Smiddle, R. D.
Partner: UNT Libraries Government Documents Department
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Additional Miscellaneous Tools in the HRT Core

Description: This memorandum presents a description of several additional miscellaneous HRT core maintenance tools, not in an earlier report (1). These tools were used in the removal of the cut up diffuser plates, probing the core wall, gauging the size of the holes, and other simple tasks. Function, design, and operation are described for the following items.
Date: September 26, 1960
Creator: Holz, P. P.
Partner: UNT Libraries Government Documents Department
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Instruction Manual, Mercury Relay Pulse Generator Model 1-1212C

Description: The Model Q-1212C Pulser is a single frequency (60 pps) generator whose output waveform is characterized by a rise-time of less than 4 mµsec and, depending upon the method of termination, an exponential decay having a time constant of 300 or 600µsec. The waveform approximates that produced by a radiation detector. The waveform approximates that produced by a radiation detector. The maximum available output from the instrument is 10 volts, positive or negative polarity, and is continuously adjus… more
Date: September 20, 1960
Creator: Fairstein, E.
Partner: UNT Libraries Government Documents Department
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Momentum and Heat Transfer to a Fluid Flowing Turbulently in a Pipe

Description: A mathematical model is presented for the prediction of heat transfer coefficients for fully developed turbulent flow of fluids in circular pipes by analogy to the transfer of momentum. There is also presented an empirical velocity distribution equation derived from existing experimental data for use in the analogy model. Heat transfer coefficients for fluids with Prandtl numbers ranging from 0.01 to 100 and Reynolds numbers ranging from 5x10^3 to 10^7 are presented in tabular and graphical for… more
Date: September 15, 1960
Creator: Hefner, R. J.
Partner: UNT Libraries Government Documents Department
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Some Elementary Results Concerning Escape Probabilities of Particles of Fixed Range Generated in Spheres

Description: Some results have been obtained which may be of use in studying the escape of fission fragments from slurry particles which contain fissioning material. Assuming that the fission fragments are of fixed range H, that they are generated uniformly and isotopically in a sphere of diameter D, the escape probability , mean path length, and path length distribution function have been derived.
Date: September 14, 1960
Creator: Tobias, Melvin
Partner: UNT Libraries Government Documents Department
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Evaluation of Experiment Off-gas System for the EGCR-LITR Capsule Experiment

Description: A proposed modification to the experiment off-gas system for the EGCR-LITR Capsule Experiment is evaluated by comparing the atmospheric radiation doses to laboratory personnel that could result in the event of an experiment failure while utilizing the present off-gas system to those doses that would result if various modifications to the existing system were effected. The modifications considered include the addition of an iodine vapor adsorber and a krypton-xenon adsorber. The addition of an i… more
Date: September 2, 1960
Creator: Adams, R. E. & Browning, W. E.
Partner: UNT Libraries Government Documents Department
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Precipitation of Crystalline Uranium and Thorium Peroxide: Applications to Fuel-Element Oxides and Purifications

Description: Departures from the usual precipitation method produced crystalline uranium peroxide in several forms. Three types of segregated needles were used in the preparation of three pellets for pellet-type elements. Densities of the pellets ranged from 93 to 97% of theoretical, depending on conditions of precipitation.
Date: September 21, 1960
Creator: Whetsel, H. B. & Dean, O. C.
Partner: UNT Libraries Government Documents Department
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APDAC-I, A PCTR Data Analysis Code for the IBM 709

Description: A flexible foil data processing program is described. Raw data on foil radioactivity are the basic input information required. Output may consists of relative activities, saturated activities, and/or cadmium ratio and flux spectrum data. A statistical analysis of the data is executed with the direct calculation, and errors estimated for the output data.
Date: September 7, 1960
Creator: Lilley, J. R.
Partner: UNT Libraries Government Documents Department
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Vibrational States Of The HD⁺ And HT⁺ Ions

Description: The vibrational eigenvalues belonging to the ground electronic state of the HD<sup>+ and HT<sup>+ ions have been calculated. These calculations have been done for the J = 0 rotational state and neglecting the dynamic corrections to the potential. For the HD<sup>+ ion we find twenty-two bound states, and for the HT<sup>+ ion twenty three bound states.
Date: September 29, 1960
Creator: Cohen, Stanley; Hiskes, John R. & Ridell, Robert J., Jr.
Partner: UNT Libraries Government Documents Department
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The Statistical Geometry Of Bubble Tracks

Description: An exact treatment of the structure of tracks in nuclear research emulsion recently was attempted with some success. Many of the proofs also appear to be generally valid for bubble tracks in Wilson chambers. This is a summary of the results that are applicable to tracks of charged particles in bubble chambers.
Date: September 28, 1960
Creator: Barkas, Walter H. (Walter Henry), 1912-1969
Partner: UNT Libraries Government Documents Department
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The Complete Bound Spectrum Of The Negative Hydrogen Ion

Description: Ever since the existence of a bound state of Hydrogen was discovered, it has been uncertain whether any other bound states existed. In addition to its importance in astrophysics this question has also come up in discussions of the scattering of electrons from hydrogen. To settle this problem it is necessary to calculate lower bounds for the eigenvalues of the Schrodinger equation. A simple calculation has been carried out for the problem of the negative hydrogen ion.
Date: September 1960
Creator: Schwartz, Charles
Partner: UNT Libraries Government Documents Department
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Current Status Of Curium Inhalation Exposures In Humans

Description: An incident is described concerning a curium accelerator target aerolized by explosion. Management of the spill, sampling, particle sizing, and medical findings are presented. Seven of the 27 persons present showed low levels of curium excretion. The data from this incident were compared with those from three other inhalation exposures to curium compounds at Lawrence Laboratory.
Date: September 1960
Creator: Parker, Howard G.; Thaxter, Myron D. & Biggs, Max W.
Partner: UNT Libraries Government Documents Department
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Annual Progress Report of Methods to Increase Burnout Heat Transfer

Description: "Acoustic energy generated by mechanical or electrical signals and its effect on pool boiling of isopropanol were studied. Daring the course of the investigation, a method was devised to determine the amount of heat-transfer surface wetted by the boiling isopropanol. Plots of heat flux versus temperature difference for each frequency showed that the acoustic energy did not significantly affect the heat flux at burnout, but slightly increased the critical temperature difference. No general effec… more
Date: September 30, 1960
Creator: Markels, Michael; Durfee, Robert L. & Richardson, Robert
Partner: UNT Libraries Government Documents Department
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Nuclear Track Image Intensifier

Description: "Development of a nuclear track image intensifier which is to have a cathode dia. of 83 in. and an output screen dia. of 1 in. is reported. Spherical faceplates for the intensifier which were etched to a thickness of 0.025 in. over a dia. of 80 in. withstood a pressure differential of 2 atm. Techniques were developed to measure spectral energy distribution, phosphor burn characteristics, phosphor efficiency, and phosphor persistence. Thallium- activated RbI and CsI were evaluated for use in the… more
Date: September 30, 1960
Creator: DesRochers, R. D.; Stern, H. A. & Ezard, L. A.
Partner: UNT Libraries Government Documents Department
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Thermonuclear Plasma Containment in Open-Ended Systems

Description: "A survey is presented of the theory of confinement in open-ended systems (such as mirror machines and cusped geometries) together with the slight amount of experimental confrontation with theory that exists at present."
Date: September 30, 1960
Creator: Grad, Harold, 1923-
Partner: UNT Libraries Government Documents Department
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Equilibrium Configuration of a Plasma in the Guiding Center Limit

Description: "We compute the equilibrium configuration of a collision-free plasma contained in an axially symmetric magnetic field. The plasma is characterized by a non-scalar pressure tensor which is obtained from a microscopic distribution function in a form suggested b the guiding center approximation. The solution is calculated in the limit where the ratio of the width to the length of the plasma region and the ratio of the gas to the magnetic pressure are both small. Boundary values at the midplane … more
Date: September 15, 1960
Creator: Oppenheim, Alan
Partner: UNT Libraries Government Documents Department
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Diffraction of Hydromagnetic Wave by a Half Plane

Description: "In this paper we solve for the diffracted wave which results when a weak hydromegnetic shock impinges on a rigid perfectly conducting half plans."
Date: September 30, 1960
Creator: Gardner, Clifford S.
Partner: UNT Libraries Government Documents Department
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Lung Hazards From Inhaled Radioactive Particulate Matter

Description: Conclusions from the study: "Radioactive dusts are carcinogenic, and can cause cancer of the lung. complete dose response curves have not yet been determined. All the parameters that render this demonstrably toxic material (radioactive dust) have not yet been evaluated. It is strongly suggested by the experimental data that duration of radiological insult to the lung is an important factor in eliciting lung cancer. The atmospheric tolerance concentrations now in use seem to afford little marg… more
Date: September 14, 1960
Creator: Cember, Herman
Partner: UNT Libraries Government Documents Department
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