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Utilization of Radioactive Isotopes in Coal Process Research

Description: "Experiments are continuing to determine the cleaning efficiency and rate of cleaning of fine size bituminous coals by the water fluidization method. By radio-tracing neutron activated pyrites, data were obtained on the rate of segregation of mineral impurities from the coal as a function of particle size and density in a 48 x 0 mesh hydraulic fluidized coal bed. Two methods of radio- tracing were demonstrated. The ultimate cleaning efficiency of the above size coal is also reported."
Date: unknown
Creator: Yavorsky, P. M. & Gorin, E.
Partner: UNT Libraries Government Documents Department
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Utilization of Radioactive Isotopes in Coal Process Research

Description: "The experimental technique was checked out and the equipment put in working order for the study of the capacity and efficiency of the hydraulic cleaning of coal by water fluidization. The method to determine operating capacity consists of determining the segregation rate by dynamic tracing of radioactive mineral impurities of various size and density ranges, that are injected into the fluidized bed of coal. The equilibrium position of the injected tracer in the fluidized bed of solids is also … more
Date: unknown
Creator: Yavorsky, P. M. & Gorin, E.
Partner: UNT Libraries Government Documents Department
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Progress Report on Project at (30-1)1018: Polar-Nonpolar or Amphipathic Inorganic Compounds

Description: "Results of molecular studies showed that, depending on the chemical composition, polyphosphates are either linear or branched flexible chain molecules. The branch points were easily destroyed by hydrolysis. Hydrolytic stability studies showed that the rate constants are much smaller for the splitting of internal bonds than for the hydrolysis near the chain ends, where both monomeric and trimeric rings are formed. The kinetic study of the degradation of sodium pentaphosphate was continued. Prel… more
Date: unknown
Creator: Strauss, U. P.
Partner: UNT Libraries Government Documents Department
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A Study of the Mechanism of Radiation-Induced Gelation in Monomer-Polymer Mixtures

Description: "Gel contents can be obtained with polyethylene swollen with inhibitor- free allyl acrylate or inhibitor-free allyl methacrylate at a dose of only 0.05 Mrads Using Co/sup 60/ as the radiation source, allyl methacrylate gives higher gel content than allyl acrylate under similar conditions. icant and continues after Co/sup 60/ irradiation has been completed. Monomer desorption after a dose of 1.2 Mrads is less than after 0.05 Mrads, and does not continue after irradiation is stopped. Gel contents… more
Date: unknown
Creator: Odain, George; Bernstein, Bruce S. & Kelly, James J.
Partner: UNT Libraries Government Documents Department
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Progress Report on Plutonium Bearing Glass, July 1960 - March 1961

Description: "Work accomplished in incorporating plutonium oxide in glass and glass fibers between July 1960 and March 1961 is summarized. The purpose of producing plutonium bearing glass and glass fibers was to eliminate or reduce the radiological and toxicological hazards associated with plutonium. Initial results using "wipe" tests showed no removable alpha contaminant in freshly prepared samples. Leaching studies were made using water, dilute HCl, and HNO/ sub 3/. The amount of PuO/sub 2/ leached from t… more
Date: unknown
Creator: Jones, L. V.; Lockwood, P.; Tiede, R.; Harteck, P. & Dondes, S.
Partner: UNT Libraries Government Documents Department
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A Study of the Mechanism of Radiation-Induced Gelation in Monomer-Polymer Mixtures

Description: "Gel contents of irradiated polyethylene previously swollen with fourteen different di- and tri-functional monomers were accurately measured. Eight of these monomers are useful in reducing the radiation dose required to induce gelation. Allyl acrylate and allyl methacrylate produce the largest gel fractions (approximately -40%) after a dose of 1.2 mrads on the Co/sup 60/ source; these two monomers also swell polyethylene to a greater extent than the others. The degree of desorption of the above… more
Date: unknown
Creator: Odain, George; Berstein, B. S. & Kelly, J. J.
Partner: UNT Libraries Government Documents Department
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Ultrahigh Vacuum Techniques

Description: "Mass spectrometer monitoring of peaks upon flashing the target in measurement of CO photodesorption from W indicates bulk heating to be a main contribution to desorption. Study of auger electron ejection from absorption of O on W yields good agreement between calculated and measured values for electron ejection. Values for O adsorption on W are compared with other determinations, and wide variations in sticking probabilities are noted. Measurements of the conversion of O incident on W ribbons … more
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
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Ultrahigh Vacuum Techniques

Description: "The use of SiC in conjunction with an electron multiplier was found to offer good possibilities for a cold electron ion gage. A helium cryopump with 50 1/sec pumping speed was developed that is capable of maintaining a static system at pressures below approximates 5 x 10/sup -11/ torr with only about one liter of liquid helium every 8 hr. Additional results are reported in photon desorption experiments from tungsten and glass, hydrogen absorption on tungsten, and oxygen adsorption on tungsten.… more
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
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Ultrahigh Vacuum Techniques

Description: "Investigations were continued with zeolite traps. Results indicate that certain gases are not trapped by zeolite and must be removed by ion pumping. In experiments to obtain a cold electron source ion gage, output electron currents of several milliamperes were obtained using SiC in conjunction with an electron multiplier. Fundamental surface reaction studies were continued on photodesorption of CO from W, O adsorption on W, H solubility in W, and inelastic collisions of electrons at surfaces."
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
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Ultrahigh Vacuum Techniques

Description: "Activities in an investigation of basic phenomena associated with particle interactions at surfaces are reported. Development of components, which may be of interest to others working in ultrahigh vacuum research, for use in the research program is described. Work in development of components and techniques was directed toward investigations of non-refrigerated traps, a cryogenic pump using liquid He, and development of electron sources. Research on interaction of particles at surfaces was dev… more
Date: unknown
Creator: Fox, R. E.; Lange, W. J. & Singleton, J. H.
Partner: UNT Libraries Government Documents Department
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Ultrahigh Vacuum Techniques

Description: "Further experiments with the zeolite traps using both nude'' and tubulated ion gages indicates an appreciable amount of untrapped vapors passing through the unrefrigerated zeolite. The exact nature of this vapor was not determined. Investigations of the all stainless steel vacuum system indicate that the large source of desorbed H/sub 2/ is that adsorbed in the walls. Other work is reported on low temperature cathodes and construction of an ionization gage incorporating a SiC emitter and an el… more
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
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Ultrahigh Vacuum Techniques

Description: "Investigations were continued on the characteristics of zeolite traps and on a small cryopump. Studies of an all metal vacuum system indicated that this system is superior to glass systems when operated at elevated temperatures. The major contribution to the gas evolution is hydrogen. The characteristics of an electron multiplier operating under ultrahigh vacuum procedures were studied. The desorption of gas by photons is being investigated."
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
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Ultrahigh Vacuum Techniques

Description: "The photodesorption of gases from metals by uv photons has been studied with a high sensitivity mass spectrometer. A program to develop low-temperature cathodes is underway to study hydrogen interactions at various surfaces. Preliminary results on the degassing characteristics of an all metal system have been obtained."
Date: unknown
Creator: Fox, R. E.
Partner: UNT Libraries Government Documents Department
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Study of Negative Ions With a Cycloidal Instrument

Description: "Dissociative attachment studies were made for the production of H/sup -/ and 0/sup -/ ions in the electron bombardment of water vapor with a cycloidal instrument to compare the results with previous data obtained with mass spectrometers and total ionization tubes. The peak heights were studied as a function of spectrometer operating conditions to obtain confidence in the present data with regard to the relative intensities. Graphical representations are included of the results along with a sch… more
Date: unknown
Creator: Lange, W. J.
Partner: UNT Libraries Government Documents Department
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Evidence for an Auger Process in Chemisorption

Description: "Electron emission during the adsorption of a monolayer of oxygen on a clean'' tungsten surface is reported. This emission is attributed to the excitation of conduction band electrons during adsorption, probably as the result of Auger transitions to the chemisorbed state. Calculations based on this model of chemisorption agree qualitatively with the experimental yield."
Date: unknown
Creator: Waters, P. M.
Partner: UNT Libraries Government Documents Department
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High Pressure Pump Seal Development

Description: "The model seal test program was concluded during this Quarterly Report. The final test, 1014 hours in duration, was conducted at a sea1ing pressure of between 2100 to 2300 psig and at a leakage rate of 2.14 gph. The seal face materials evaluated were an aluminum oxide rotor running against a stator face made of tungsten carbide for the high pressure seal and Graphitiar 39 for the low pressure element. Optical examination of the faces after the test showed no measurable wear. Nine unscheduled s… more
Date: unknown
Creator: Hajner, R. C.
Partner: UNT Libraries Government Documents Department
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High Pressure Pump Seal Development

Description: "The model seal test program was continued throughout the period covered by this report. Of notable mention, a test, 507 hours in duration, was conducted at 2000 psig and 2.75 GPH leakage. Examination of the seal faces after the test showed that there was no measurable wear within the limits of an optical inspection. The full size seal (5-1/2" shaft diameter) and the related test strand are in the manufacturing phase. The instrumentation and associated equipment for the full size seal test are … more
Date: unknown
Creator: Hajner, R. C.
Partner: UNT Libraries Government Documents Department
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High Pressure Pump Seal Development

Description: "The full size seal (5 1/2" shaft diameter) was redesigned to incorporate the latest seal geometry which was developed as a result of the model seal test program. A number of compatible seal face material combinations, which performed satisfactorily during the model seal test program, was also selected for evaluation in the full size seal. All the detail drawings of the seal and test stand were completed. A test program for the full size seal was prepared and approved."
Date: unknown
Creator: Hajner, Robert C.
Partner: UNT Libraries Government Documents Department
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Survey of Component Requirements and Availability for Gas-Cooled Nuclear Reactor Power Plants

Description: "The potential of closed-cycle gas turbines for producing a highly efficient nuclear power plant is discussed. Such turbines are being developed for three applications: the HTRE program (Heat Transfer Reactor Experiment) for nuclear aircraft propulsion, the MGCR program (Marine Gas Cooled Reactor) for nuclear marine propulsion, and the ML-1 (Mobile Low-Power Gas-Cooled Nuclear Power Plant) for nuclear electric power generation in an Army mobile power plant as part of the Army Gas-Cooled Reactor… more
Date: unknown
Creator: Novickis, George
Partner: UNT Libraries Government Documents Department
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Survey of Component Requirements and Availability for Gas-Cooled Nuclear Reactor Power Plants

Description: "Various existing circulator types suitable for primary loops of gas- cooled nuclear power plants are discussed. Operating characteristics, drive systems, structural problems, and maintenance questions are analyzed. The present state of the art is established and requirements, availability, development areas, and limiting factors are indicated. Several existing test- loop gas circulators are included in the general discussion."
Date: unknown
Creator: Novickis, G.
Partner: UNT Libraries Government Documents Department
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Survey of Component Requirements and Availability for Gas-Cooled Nuclear Reactor Power Plants

Description: "The state-of-the-art of heat exchangers for gas-cooled reactor primary circuits is established by describing steam generators, primary heat exchangers, recuperators, and coolers of a number of gas-cooled nuclear projects, and by listing plant and exchanger main characteristics in three summery tables. Information is based in part on references indicated and in par+ on data from manufacturers. The availability of suitable heat exchangers is represented in the form of 35 Data Sheets submitted by… more
Date: unknown
Creator: Novickis, George
Partner: UNT Libraries Government Documents Department
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Survey of Component Requirements and Availability for Gas-Cooled Nuclear Reactor Power Plants

Description: "Expressions were derived for cycle thermal efficiency, work ratio, related useful work, and relative temperatures, and pressures at significant stations, all for a representative direct closed gas-turbine cycle. A parametric study of this cycle was performed for He and N/sub-2/ as coolants. Results of this parametric study are given in tables and charts. Four different cycles, corresponding to the maximum cycle temperatures equal to 1300, 1500, 1700, and 2000 deg F, were established for each o… more
Date: unknown
Creator: Novickis, G. & Zudans, Z.
Partner: UNT Libraries Government Documents Department
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Survey of Component Requirements and Availability for Gas-Cooled Nuclear Reactor Power Plants

Description: "Helium, nitrogen, carbon dioxide, and other gases suitable as reactor coolants were evaluated. It is shown that because of the helium conservation program, recently authorized by legislation, sufficient helium will become available for domestic power plants and for the requirements of the Euratom group. Tables of thermodynamic properties for helium and molecular nitrogen were computed from the Beattie-Bridgman equation of state. Specific enthalpy, specific entropy, isobaric specific heat, spec… more
Date: unknown
Creator: Zudans, Zenons & Goff, John A.
Partner: UNT Libraries Government Documents Department
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Power Flattening Studies for Radioisotope-Thermoelectric Generators

Description: "The natural exponential decay of a radioisotope used as a heat source for a thermoelectric generator makes the use of a power flattening'' device highly desirable, especially when the duration of the mission is large compared to the half-life of the radioisotope. Power-flattening devices are considered which either dump excess heat outside the thermoelectric generator or use the characteristics of the generator to absorb the excess heat and thereby regulate the hot junction temperature. A numb… more
Date: unknown
Creator: Rush, R. E. & Belofsky, H.
Partner: UNT Libraries Government Documents Department
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