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Stability of trapped-particle modes in lower-hybrid pump

Description: The stability of dissipative trapped-particle modes in the presence of a self-consistent lower-hybrid pump is analyzed theoretically. The pump can either be a single coherent wave or a spectrum of turbulent waves. Corresponding dispersion relations modified by the pump are derived and conditions for excitation and suppression of the modes are also discussed.
Date: May 1, 1976
Creator: Chen, L.; Kaw, P. K. & Tang, W. M.
Partner: UNT Libraries Government Documents Department
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Environmental status of the Lake Michigan region. Volume 3. Chemistry of Lake Michigan

Description: The report is a synoptic review of data collected over the past twenty years on the chemistry of Lake Michigan. Changes in water quality and sediment chemistry, attributable to cultural and natural influences, are considered in relation to interacting processes and factors controlling the distribution and concentration of chemical substances within the Lake. Temperature, light, and mixing processes are among the important natural influences that affect nutrient cycling, dispersal of pollutants,… more
Date: May 1, 1976
Creator: Torrey, M S
Partner: UNT Libraries Government Documents Department
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Piezo electric polaron and polaron pinning in n-CdS

Description: The cyclotron resonance of the piezoelectric polaron in n-CdS has been investigated using far infrared spectroscopy at magnetic fields to 90 kOe. Both lamellar grating and Michelson Fourier transform spectrometers were used with a 0.3/sup 0/K Ge bolometer to study the photon energy region from 10 cm/sup -1/ to 60 cm/sup -1/. The theory of Miyake predicts that the frequency of the polaron's cyclotron resonance is shifted from the bare hand electron resonance frequency according to the expression… more
Date: May 1, 1976
Creator: Nagasaka, K.
Partner: UNT Libraries Government Documents Department
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Correlation of radionuclide leachabilities with microstructures of glasses containing Savannah River Plant waste

Description: Leachabilities of cesium and strontium from the glass matrices were correlated with the microstructures of glasses containing waste sludge from two SRP waste tanks. All sludge components, except mercury which volatilized, were completely soluble in the melt, but small amounts of crystalline iron oxide precipitated during cooling. These precipitates were less leachable than the glass matrix. Even though the compositions of the two sludges that were tested were similar, glass containing one of th… more
Date: May 1, 1976
Creator: Kelley, J. A. & Rankin, W. N.
Partner: UNT Libraries Government Documents Department
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Alternatives for Managing Wastes From Reactors and Post-Fission Operations in the LWR Fuel Cycle: Volume 2. Alternatives for Waste Treatment

Description: Volume II of the five-volume report is devoted to the description of alternatives for waste treatment. The discussion is presented under the following section titles: fuel reprocessing modifications; high-level liquid waste solidification; treatment and immobilization of chop-leach fuel bundle residues; treatment of noncombustible solid wastes; treatment of combustible wastes; treatment of non-high-level liquid wastes; recovery of transuranics from non-high-level wastes; immobilization of misce… more
Date: May 1, 1976
Partner: UNT Libraries Government Documents Department
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Thorium utilization program progress report for January 1, 1974--June 30, 1975. [Reprocessing; refabrication; recycle fuel irradiations]

Description: Work was carried out on the following: HTGR reprocessing development and pilot plant, refabrication development and pilot plant, recycle fuel irradiations, engineering and economic studies, and conceptual design of a commercial recycle plant. (DLC)
Date: May 1, 1976
Creator: Lotts, A. L. & Kasten, P. R.
Partner: UNT Libraries Government Documents Department
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HEXEREI: a multi-channel heat conduction convection code for use in transient thermal hydraulic analysis of high-temperature, gas-cooled reactors. Interim report

Description: A description is given of the development and verification of a generalized coupled conduction-convection, multichannel heat transfer computer program to analyze specific safety questions involving high temperature gas-cooled reactors (HTGR). The HEXEREI code was designed to provide steady-state and transient heat transfer analysis of the HTGR active core using a basic hexagonal mesh and multichannel coolant flow. In addition, the core auxiliary cooling systems were included in the code to prov… more
Date: May 1, 1976
Creator: Giles, G. E.; DeVault, R. M.; Turner, W. D. & Becker, B. R.
Partner: UNT Libraries Government Documents Department
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Operational safety system reliability. Progress report, November 15, 1975--May 14, 1976. [LMFBR]

Description: The report describes the objectives and present status of a study concerning the operational reliability of nuclear power plants. The purpose of the study is to develop utilitarian models for use with the Liquid-Metal-Cooled Fast Breeder Reactor; initial testing of the formalism can be carried out with LWR operational data. Methods are being directed towards (1) day-to-day operation of the nuclear plant protection system and (2) to better understand the protection system sensor characteristics … more
Date: May 1, 1976
Creator: Hockenbury, R. W. & Yeater, M. L.
Partner: UNT Libraries Government Documents Department
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Density and shape factor of sodium aerosol. Progress report, January 1, 1976--March 31, 1976. [LMFBR type reactors]

Description: Several approaches for characterizing the physical and aerodynamic properties of irregularly shaped aerosol particles are reviewed. Measurements of density modification factor, dynamic shape factor, and particle density using an aerosol centrifuge and a scanning electron microscope are described. Calibration procedures for this characterization method are described and preliminary results reported.
Date: May 1, 1976
Creator: Hinds, W. & First, M. W.
Partner: UNT Libraries Government Documents Department
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Special problems in nuclear instrumentation. Progress report, September 1, 1975--August 31, 1976

Description: Five different mixtures of polypropylene, nylon-11, and carbon black were prepared and several specimens were molded of each. The object of this program is to determine the compatability of these components and their suitability for applications in radiation dosimetry. Significant advances were made in the fabrication of small ionization chambers. A new air-equivalent chamber was designed which incorporates essentially all of these advances. Seven cables which are in use for carrying the curren… more
Date: May 1, 1976
Creator: Spokas, J. J.
Partner: UNT Libraries Government Documents Department
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Mathematical model of a phantom developed for use in calculations of radiation dose to the body and major internal organs of a Japanese adult

Description: A mathematical model of a phantom simulating the body and major internal organs of a Japanese adult has been developed for use in computer calculations of radiation dose. The total body height of the mathematical phantom is 162 cm, and the total body mass is 55 kg based on densities of 0.3, 1.4, and 1.0 g/cm/sup 3/ for the lung, skeleton, and bulk tissues of the body, respectively.
Date: May 1, 1976
Creator: Kerr, G. D.; Hwang, J. M. & Jones, R. M.
Partner: UNT Libraries Government Documents Department
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Characteristics of American coals in relation to their conversion into clean energy fuels. Quarterly technical progress report, January--March 1976. [2 appendices; 19 refs. Dryflo separation tests data]

Description: Responses to the questionnaire, which was distributed to determine the extent to which the nation's coal seams have been sampled and characterized, are being received. Early comparisons indicate a mathematical relationship between average random reflectance (Rapid Scan) and the mean-maximum reflectance as obtained by standard reflectance analysis. Results obtained so far show support of a diffusion dominance mechanism in the oxidation region of a combustion pot and a chemical kinetic mecha… more
Date: May 1, 1976
Creator: Spackman, W.; Davis, A.; Walker, P. L.; Lovell, H. L.; Essenhigh, R. H.; Vastola, F. J. et al.
Partner: UNT Libraries Government Documents Department
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Equation of state for the detonation products of hexanitrostilbene at various charge densities

Description: An extensive description of the detonation behavior for the unique and useful high explosive hexanitrostilbene (HNS) is presented. To accomplish this the necessary experimental results measured by detonation of the pure material at charge densities of 1.00, 1.20, 1.40, 1.60, and 1.65 (g/cm/sup 3/ = Mg/m/sup 3/) were compiled and evaluated. Estimates of the equation of state of the detonation products were made for each charge density. To confirm these estimates two-dimensional hydrodynamic (HEM… more
Date: May 1, 1976
Creator: Lee, E. L.; Walton, J. R. & Kramer, P. E.
Partner: UNT Libraries Government Documents Department
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Joining uranium to steel

Description: A method has been devised which will allow the joining of uranium to steel by fusion welding through the use of an intermediate material. Uranium-0.5 titanium was joined to AISI 304L stainless steel by using a vanadium insert. Also, a method is now available for selecting possible filler metals when two entirely dissimilar metals need to be joined. This method allows a quantitative ranking to be made of the possible filler metals and thus the most likely candidate can be selected.
Date: May 1, 1976
Creator: Perkins, M. A.
Partner: UNT Libraries Government Documents Department
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Linear triangle finite element formulation for multigroup neutron transport analysis with anisotropic scattering

Description: The discrete ordinates method is the most powerful and generally used deterministic method to obtain approximate solutions of the Boltzmann transport equation. A finite element formulation, utilizing a canonical form of the transport equation, is here developed to obtain both integral and pointwise solutions to neutron transport problems. The formulation is based on the use of linear triangles. A general treatment of anisotropic scattering is included by employing discrete ordinates-like approx… more
Date: May 1, 1976
Creator: Lillie, R. A. & Robinson, J. C.
Partner: UNT Libraries Government Documents Department
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Finite Deformation Analysis of Crack Tip Opening in Elastic-Plastic Materials and Implications for Fracture Initiation

Description: Analyses of the stress and strain fields around smoothly blunting crack tips in both non-hardening and hardening elastic-plastic materials, under contained plane strain yielding and subject to mode I opening loads, have been carried out by a finite element method suitably formulated to admit large geometry changes. The results include the crack tip shape and near-tip deformation field, and the crack tip opening displacement has been related to a parameter of the applied load, the J-integral. Th… more
Date: May 1, 1976
Creator: McMeeking, R. M.
Partner: UNT Libraries Government Documents Department
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Analysis of evidence for an irreproducible martensite-like behavior in actinide metals and alloys below room temperature. [Review]

Description: Evidence is presented which suggests that a low-temperature, martensite-like behavior may be quite general in actinide metals and their alloys and compounds. There may be no metastable martensitic embryos in an ..cap alpha..-phase structure of high-purity U, Np, and Pu formed by a diffusion-controlled ..beta.. ..-->.. ..cap alpha.. transformation, and thus no evidence for low-temperature phases. The effect of impurity content on observed low-temperature physical properties of these actinides is… more
Date: May 1, 1976
Creator: Sandenaw, T. A.
Partner: UNT Libraries Government Documents Department
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ZONE: a finite element mesh generator. [In FORTRAN IV for CDC 7600]

Description: The ZONE computer program is a finite-element mesh generator which produces the nodes and element description of any two-dimensional geometry. The geometry is subdivided into a mesh of quadrilateral and triangular zones arranged sequentially in an ordered march through the geometry. The order of march can be chosen so that the minimum bandwidth is obtained. The node points are defined in terms of the x and y coordinates in a global rectangular coordinate system. The zones generated are quadrila… more
Date: May 1, 1976
Creator: Burger, M. J.
Partner: UNT Libraries Government Documents Department
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Northview Junior High solar energy demonstration project. Final report, 16 May 1974--16 May 1975

Description: This report covers a one-year test and evaluation of the Northview Junior High School Solar Energy Demonstration Project. The system provided about 5 percent of the school's energy requirements for the year. This energy was used for space heating, domestic water heating, and pool water heating for a total of 629,000,000 solar supplied Btu's. Average collector efficiency for the year was 44 percent. Operating costs were less than 5 percent of the value of the collected energy. Solar insolation d… more
Date: May 1, 1976
Creator: Merrill, G. & Dib, A.
Partner: UNT Libraries Government Documents Department
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Thermal cycle tests on double sided and multilayer printed wiring boards

Description: Substantial differences were found in the capability of plated-through holes in both double sided and multilayer printed wiring boards to withstand thermal cycling between -65/sup 0/ and 125/sup 0/C. The circuit pattern used for the test contained 240 holes connected in series, 80 each of 0.51 mm, 0.76 mm and 1.02 mm dia. Double sided glass-epoxy and glass-polyimide boards withstood 544 cycles with a total circuit resistance increase of 2 percent. However, paper-epoxy boards revealed many open … more
Date: May 1, 1976
Creator: Jennings, C. W.
Partner: UNT Libraries Government Documents Department
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Method for recycling radioactive noble gases for functional pulmonary imaging

Description: A theoretical treatment of the dynamic adsorption and desorption processes in the adsorption column is developed. The results of this analysis are compared with the space-time measurements of /sup 133/Xe activity distribution in a charcoal column, when trace amounts of this gas in exponentially decreasing concentrations are fed into the column. Based on these investigations, a recycling apparatus is designed for use with xenon isotopes, especially /sup 127/Xe, in studies of pulmonary function. … more
Date: May 1, 1976
Creator: Forouzan-Rad, M.
Partner: UNT Libraries Government Documents Department
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Energy use for building construction. Preliminary progress report for period March 1, 1976--May 15, 1976. [Energy intensities of various sectors and overall industry from Energy Input/Output Model]

Description: The building construction industry, as broken down by the Bureau of Economic Analysis, U.S. Department of Commerce, was integrated into the Energy Input/Output Model developed at the Center for Advanced Computation, University of Illinois. The resulting expanded model was used to determine energy intensities of various (49) building construction (new and maintenance) sectors and of the overall building construction industry, for year 1967. The latter figure was computed at about 70,000 Btu/$, i… more
Date: May 1, 1976
Creator: Hannon, B M; Stein, R G; Segal, B & Serber, D
Partner: UNT Libraries Government Documents Department
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Semiscale Mod-1 program and system description for the reflood heat transfer tests (test series 3)

Description: The purpose of the reflood heat transfer test series is to investigate the reflood heat transfer characteristics of the Semiscale Mod-1 electrically heated core which contains rods with 5.5-ft heated lengths. The data provided by these tests are expected to be valuable in the calculation of core and system response during the reflood portion of integral-type tests to be performed later in the Mod-1 program. Presented are descriptions and objectives of the overall Semiscale Mod-1 program and of … more
Date: May 1, 1976
Partner: UNT Libraries Government Documents Department
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Evaluation for ENDF/B-IV of the neutron cross sections for /sup 235/U from 82 eV to 25 keV

Description: Capture and fission cross sections for /sup 235/U in the ''unresolved resonance'' energy region were evaluated to permit determination of local-average resonance parameters for the ENDF/B-IV cross section file. Microscopic data were examined for infinitely dilute average fission and capture cross sections and also for intermediate structure unlikely to be reproduced by statistical fluctuations of resonance widths and spacings within known laws. Evaluated cross sections, averaged over lethargy i… more
Date: May 1, 1976
Creator: Peelle, R. W.
Partner: UNT Libraries Government Documents Department
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