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A Study of the Mechanism of Radiation Induced Gelation in Monomer-Polymer Mixtures

Description: "Additional mixtures of polymers and multi-unsaturated monomers have been prepared, irradiated and the gel content determined. The gel content determination of crosslinked polyolefins has been investigated in detail. The multi-unsaturated monomers used and radiation conditions applied up to this time have not given significant gel contents for polypropylene. the polypropylene resin used has been characterized by differential extraction."
Date: November 22, 1960
Partner: UNT Libraries Government Documents Department
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A Study of the Mechanism of Radiation Induced Gelation in Monomer-Polymer Mixtures

Description: "Polyvinyl chloride degrades quite badly under irradiation due to the ease of splitting out HC1. The incorporation of polyfunctional monomers, however, has been found to lower the radiation doses required for gelation below those which result in degradation. Thus, gelation of polyfunctional monomer-polyvinyl chloride mixtures has been achieved quite readily."
Date: 1961
Creator: Radiation Applications Incorporated
Partner: UNT Libraries Government Documents Department
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A Study of the Mechanism of Radiation Induced Gelation in Monomer-Polymer Mixtures

Description: "A number of mixtures of polymers and multi-unsaturated monomers have been prepared and irradiated. The content of insoluble gel of irradiated samples of these polymer-monomer mixtures has been determined by extraction."
Date: September 20, 1960
Creator: Radiation Applications Incorporated
Partner: UNT Libraries Government Documents Department
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Molecular Association and Electronic Structures of Nickel (II)

Description: "A new phenomenon which can, under certain circumstances, account for anomalous magnetic and spectral behavior of planar nickel(II) complexes has been discovered. This is a molecular association of the solute molecules in solvents of low coordinating power. It is shown that the magnetic moment and spectrum of bis(2.6-dimethyl1-3,5-heptanediono)nickel(II), Ni(DIBM)z, dissolved in toluene, are dependent upon both temperature and concentration.
Date: November 30, 1960
Creator: Cotton, F. Albert (Frank Albert), 1930-2007 & Fackler, John P.
Partner: UNT Libraries Government Documents Department
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Visible Spectra of Some Metal Tris-Acetlacetonates

Description: "The visible absorption spectra of VA3, CrA3, MnA3, FeA3 and CoA3 (A=C5H7O2, the acetylacetonate anion) are reported. The interpretation of the data in respect to the symmetry and strength of the ligand fields is discussed, with special attention to the presence and magnitudes of trigonal components in ligand fields and its consistency with certain results of paramagnetic trigonal fields of appreciable magnitude are present."
Date: August 30, 1960
Creator: Cotton, F. Albert (Frank Albert), 1930-2007 & Holm, Richard Hadley, 1934-
Partner: UNT Libraries Government Documents Department
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The Decontamination and Recovery of Precious Metals

Description: "This report is the third quarterly report under Contract AT(30-1)-2528 for the decontamination and recovery of precious metals from contaminated scrap. The results described in [2nd quarterly report] and expanded in this report confirm the statement that the method achieves not only the desired decontamination but also produces a product of high purity. In addition the relative simplicity of the method makes it particularly adaptable to large scale manipulation."
Date: 1961
Creator: Nuclear Materials and Equipment Corporation
Partner: UNT Libraries Government Documents Department
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The Decontamination and Recovery of Precious Metals

Description: "This is the second quarterly report under Contract AT(30-1)-2528 for the decontamination and recovery of precious metals from contaminated scrap. the emphasis on the analytical chemical techniques and methods was continued during this report period."
Date: 1960
Creator: Nuclear Materials and Equipment Corporation
Partner: UNT Libraries Government Documents Department
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Utilization of Radiactive Isotpoes in Coal Process Research

Description: "This is the first quarterly report on Task II of the subject Utilization of Radioactive Isotopes in Coal Process Research. There were two separate projects on Tank I; I. methods Development for Tritium Labeling of Coal Product Hydro-carbons, and II. Applications of Radio-Tracer Techniques to the Study of Fluidized Particle Mechanics. The following extended work on Task II concerns only Methods Development of Radio-Tracing With Tritium."
Date: August 15, 1960
Creator: Yavorsky, P. M. & Gorin, E.
Partner: UNT Libraries Government Documents Department
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Strontium an Calcium Metabolism in Man, Final Report

Description: "During the first two years of this program the investigation centered around the distribution of strontium and calcium in tissues of persons who came to autopsy who had received a single tracer dose of Sr85 and Ca45. I then seemed desirable to attack some of the more dynamic aspects of strontium and calcium metabolism."
Date: unknown
Creator: Schulert, Arthur R.
Partner: UNT Libraries Government Documents Department
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Utilization of Radiactive Isotpoes in Coal Process Research

Description: "This is the fourth Quarterly Report on Task II dealing with Methods Development for Radio-Tracing of Coal Product Hydrocarbons With Tritium. The problem of radio-chemical purity of traces is resolved by developing a new method of labeling with tritium that generates essentially no highly tagged side products or impurities."
Date: May 1, 1961
Creator: Yavorsky, P. M. & Gorin, E.
Partner: UNT Libraries Government Documents Department
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Utilization of Radiactive Isotpoes in Coal Process Research

Description: "This is the third quarterly report on Task II dealing with Methods Development for Radio-Tracing of Coal Product Hydrocarbons With Tritium. The problem of accurate low-level tritium assay for tagged hydrocarbons has been resolved and attention is now primarily directed at the questions of tritium mobility and radio-chemical purity in tagged tracers."
Date: February 15, 1961
Creator: Yavorsky, P. M. & Gorin, E.
Partner: UNT Libraries Government Documents Department
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Utilization of Radiactive Isotpoes in Coal Process Research

Description: "With careful attention to details, tritium assays of satisfactory accuracy have been achieved on low activity standard samples by dry combustion and liquid scintillations counting of the product water.This method is faster, more accurate and dependable than the zinc fusion-ion chamber method fro low level tritium assays. At 380 degrees C, tritium loses from hydrocarbon tracers by isotopic exchange is significant and must be corrected for in tracer measurements at this elevated temperature."
Date: November 15, 1960
Creator: Yavorsky, P. M. & Gorin, E.
Partner: UNT Libraries Government Documents Department
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Computer description APPR-1 simulator

Description: The APPR-1 is a pressurized water reactor having a low specific heat fuel and a water primary coolant. The primary coolant loop delivers heat from the reactor to the steam generator. The secondary water in the steam generator is converted to steam and then taken to the turbine to drive an electrical generator. The simulation of this system is broken down into three primary areas: the neutron kinetics in the reactor which are necessary to generate the primary power function, the heat transfer… more
Date: December 15, 1958
Creator: RCA Service Company
Partner: UNT Libraries Government Documents Department
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An approach to the study of solid state bonding

Description: The program objective has been to investigate the possible similarity between a bond interface and a grain boundary. The criterion for establishing the similarity of a bond interface and a grain boundary was the migration characteristics of the boundary under the influence of controlled orientation, strain level, temperature and time. In addition, the orientation dependency of the "threshold", or minimum deformation, for bonding would have to be determined. The initial bonding studies were to … more
Date: 1959
Creator: Steele, R. K. & Kozol, J.
Partner: UNT Libraries Government Documents Department
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The Spectrum of a Nuetron Transport Operation

Description: The spectrum of the mono-energetic neutron transport operator for a homogeneous sphere where the neutrons are scattered with spherical symmetry in the laboratory system is considered.
Date: June 1, 1960
Creator: van Norton, Roger N.
Partner: UNT Libraries Government Documents Department
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Fuel Element Development Program for the Pebble Bed Reactor

Description: ...Development during this quarter have caused a shift in emphasis of the Pebble Bed Reactor Fuel Element Development Program from coatings on the sphere surface to coatings on individual fuel particles as the major deterrent to fission product leakage. In a high level irradiation test, cracks developed in the coatings of specimens coated with pyrolytic carbon and siliconized silicon carbide. In another high level irradiation test, a graphite sphere fueled with Al2O3 coated with UO2 particles … more
Date: 1960
Creator: Sanderson & Porter, Inc.
Partner: UNT Libraries Government Documents Department
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PBM, A Two-Group, Two-Region Reactor Model for Homogeneous, Highly Absorbing Systems and Machine Codes for Its Application

Description: A nuclear model has been developed for homogeneous, two-region reactors possessing a relatively large percentage of epithermal absorption in both the core and blanket region. A number of new IBM 650 programs have been developed and existing programs modified to form a group of programs, compatible with the nuclear model and with each other, which can be used for preliminary evaluation of the effed of design variable on reactor characteristics.
Date: December 1960
Creator: Sanderson & Porter, Inc.
Partner: UNT Libraries Government Documents Department
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The Pebble Bed Reactor Program

Description: Several different types of experimental facilities have been evaluated to determine the most suitable and economical means of demonstrating the technical feasibility of the Pebble Bed Reactor concept. The criteria for demonstrating technical feasibility are: 1) bulk irradiation of fuel elements in order to obtain statistical data on performance, 2) Maintenance of system activity at specified levels, and 3) Feasible maintenance procedures. An additional criterion, which is required to achieve b… more
Date: 1959
Creator: Sanderson & Porter, Inc
Partner: UNT Libraries Government Documents Department
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Pebble Bed Friction Factor and Thermal Expansion Tests

Description: Tests were conducted to determine the friction factor of randomly packed beds of 3/4-inch diameter spheres in 8-inch and 15-1/4-inch diameter beds, and of 1-1/2-inch diameter spheres in 15-1/4-inch diameter bed. The bed depths were varied in an attempt to isolate the effects of entrance and exit losses. The bed Reynolds number, base on sphere diameter, was varied from 5,000 to 50,000.
Date: August 31, 1960
Creator: Leeman, C. A.
Partner: UNT Libraries Government Documents Department
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The Pebble Bed Reactor Program

Description: The coolant stream of all nuclear reactors caries some activity due to one or more of the following: a) neutron activation of coolant atoms, b) neutron activation of corrosion products carried by the coolant stream, c) fission recoil into the coolant stream, d) fission products leaking into the coolant stream. The Pebble Bed Reactor is not concerned with (1) and (b) since the helium working fluid, or coolant, has an activation cross-section which is essentially zero and its inert chemical natu… more
Date: 1960
Creator: Sanderson & Porter, Inc.
Partner: UNT Libraries Government Documents Department
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Fuel Element Development Program for the Pebble Bed Reactor

Description: Previous results from the Pebble Bed Reactor Fuel Element Development Program had shown the excellent promise of vapor-deposited Al2O3 doq5intw on UO2 particles as a low permeability high temperature fission product barrier. However, since the matrix material for the PBR fuel element is a graphite sphere, carbonaceous coatings on the dispersed fuel particles might be of more interest because of improved particle coating-matrix compatibility and no displacement of neutron moderating materials. … more
Date: 1961
Creator: Sanderson & Porter, Inc.
Partner: UNT Libraries Government Documents Department
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Conical Refraction in Crystal Optics and Hydromagnetics

Description: When light propagates with the wave normal in the direction of an optic axis of a biaxial crystal, the usual ray theory breaks down. This phenomenon can be analyzed by means of an asymptotic solution of Maxwell's equations. The intensity is governed by a partial differential equation within the phase surfaces, instead of ordinary differential equations along rays. This example slows that light does not always propagate along rays. A similar phenomenon occurs in hydromagnetics.
Date: April 22, 1960
Creator: Ludwig, Donald
Partner: UNT Libraries Government Documents Department
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On the Kinetic Theory of Steady Gas Flows

Description: An approximate Boltzmann equation, known as the single relaxation model is studied here. This equation is linearized and the fundamental solution is considered. Following N. Grad, the solution, asymptotic in small values of the ratio of mean-free-path to distance from the origin, is sought. It can be shown that the fundamental solution itself gives the asymptotic description of the flow field past an object. This solution gives the asymptotic description when the distance from the origin is… more
Date: June 28, 1960
Creator: Sirovich, L., 1933-
Partner: UNT Libraries Government Documents Department
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The p-n Cross Sections onf Ti47, V51, Cr52, Co59, and Cu63 from 4 to 6.5 Mov

Description: Absolute (p,n) cross sections have been measured for Ti47, V51, Cr52, Co59, and Cu63 at energies between 4 and 6.5 Mov. These data plus earlier measurements of the cross section for inelastic proton scattering have been used to estimate total proton absorption cross sections for V51 and Co59. An optical model calculation using parameters giving a good fit to elastic scattering measurements predicts an absorption cross section in good agreement with the measurements for Co59. For V51, some sets … more
Date: June 15, 1960
Creator: Taketanit, H. & Alford, W. P. (William Parker), 1927-
Partner: UNT Libraries Government Documents Department
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