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Kinetics of the radiation-induced exchange reactions of H/sub 2/, D/sub 2/, and T/sub 2/: a review

Description: Mixtures of H/sub 2/--T/sub 2/ or D/sub 2/--T/sub 2/ will exchange to produce HT or DT due to catalysis by the tritium ..beta.. particle. The kinetics of the reaction D/sub 2/ + T/sub 2/ = 2DT may play an important role in designing liquid or solid targets of D/sub 2/--DT--T/sub 2/ for implosion fusion, and distillation schemes for tritium cleanup systems in fusion reactors. Accordingly, we have critically reviewed the literature for information on the kinetics and mechanism of radiation-induce… more
Date: January 6, 1978
Creator: Pyper, J.W. & Briggs, C.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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New research initiatives program. Project W-219: chemistry in comet comae. Final report. [Summaries of research activities at Los Alamos Scientific Laboratory]

Description: The scientific objective to investigate theoretically chemical reactions in the comae of comets was accomplished using a one-dimensional model. Ninety-eight species, which involved 441 reactions in the presence of wavelength-dependent solar radiation, were considered in a time-dependent calculation, which includes effects resulting from ultraviolet opacity.
Date: February 1, 1978
Creator: Huebner, W.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Feasibility Studies of in-Situ Coal Gasification in the Warrior Coal Field. Quarterly Report

Description: Support studies for in-situ gasification involved design and construction of a laboratory combustor, measurement of the physical and chemical properties of coke, experiments with the shrinking core combustion model, and calculations of in-situ combustion in thin seams and a review of the in-situ gasification experiments at Gorgas, Alabama. (LTN)
Date: October 1, 1978
Creator: Douglas, George W. & McKinley, Marvin D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Kinetics of the ambient temperature dissolution of plutonium metal in sulfamic acid

Description: The stoichiometry and the kinetics of the ambient temperature dissolution of alpha-phase plutonium in sulfamic acid has been determined. Hydrogen off-gas rates and plutonium concentrations were calculated as functions of time for a variety of dissolving conditions. Calculations show that nominal 2.2 kg Pu buttons (surface area, 171 cm/sup 2/) should yield solutions containing 60 +- 10 g Pu/L after a one-hour dissolving cycle. Hydrogen off-gas rates were calculated to vary from as high as 780 mL… more
Date: March 1, 1978
Creator: Gray, L.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reaction of uranyl nitrate solutions with amberlite IRC-72 cation exchange resin at 30/sup 0/C: a kinetic investigation for the HTGR fuel recycle plant

Description: A kinetic investigation of the reaction of uranyl nitrate solution with Amberlite IRC-72 cation exchange resin was conducted at 30/sup 0/C under conditions similar to those anticipated for a High-Temperature Gas-Cooled Reactor fuel refabrication facility. A simplified mass transfer analogue expression was developed to evaluate the effects of process parameters on the resin loading rate. Correlation of the experimental data with the integrated rate expression depended only on the determination o… more
Date: January 1, 1978
Creator: Shaffer, J. H.; Shockley, W. E. & Evans, R. B., III
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Exploratory study of molten core material/concrete interactions, July 1975--March 1977. [BWR; PWR]

Description: An experimental study of the interaction between high-temperature molten materials and structural concrete is described. The experimental efforts focused on the interaction of melts of reactor core materials weighing 12 to 200 kg at temperatures 1700 to 2800/sup 0/C with calcareous and basaltic concrete representative of that found in existing light-water nuclear reactors. Observations concerning the rate and mode of melt penetration into concrete, the nature and generation rate of gases libera… more
Date: February 1, 1978
Creator: Powers, D.A.; Dahlgren, D.A.; Muir, J.F. & Murfin, W.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Anaerobic fermentation of agricultural residue: potential for improvement and implementation. Final report

Description: The results of studies designed to evaluate the potential of rapidly improving the technology of anaerobic fermentation of agricultural residues and methods of implementing it in existing agricultural operations are reported. The main objectives of this study were to: identify simple and low cost anaerobic fermentor design criteria that would be appropriate in small agricultural operations, develop high rate fermentor concepts that would enable multiple product recovery from the reactor, expand… more
Date: February 1, 1978
Creator: Jewell, W. J.; Capener, H. R. & Dell'orto, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Low Silicon Solar Array Project. Feasibility of low-cost, high-volume production of silane and pyrolysis of silane to semiconductor-grade silicon. Quarterly progress report, October-December 1978

Description: Research on silane production in a hydrogenation reactor is described. The kinetics and chemical equilibrium for the liquid phase disproportionation of H/sub 2/SiCl/sub 4/ and HSiCl/sub 3/ were studied and results are presented and discussed. Status of the studies on the feasibility and cost of manufacturing semiconductor grade polycrystalline silicon by the pyrolysis of silane in a fluid bed reactor and in a free space reactor is reported. Process design, the waste disposal system, and equipme… more
Date: January 1, 1978
Creator: Breneman, W.C.; Farrier, E.G. & Morihara, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Inelastic molecular collisions: applications of theoretical methods to problems in relaxation phenomena, laser operation, and combustion kinetics. Progress report, February 1--November 1, 1978. [Summaries of research activities at the University of Wisconsin]

Description: Practical theoretical methods are developed and implemented for handling molecular collision problems and subsequently a study was made of the important processes which influence collision rates and a computation made of rate information suitable for gas laser and combustion kinetics modeling studies. The study focuses on CO and HF molecules, which are of practical interest as molecular lasers and of theoretical interest for discerning the role of rotation processes in vibrational relaxation. 2… more
Date: January 1, 1978
Creator: Conn, R.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of stirred-tank carbonation reactors. [Removal of /sup 14/CO/sub 2/ by reaction with Ca(OH)/sub 2/]

Description: The removal of CO/sub 2/ from air in a calcium hydroxide slurry-agitated reactor was investigated to aid the design of such vessels. Gas-liquid interfacial areas were calculated using theoretical rate expression and experimental data at specific operating conditions. A correlation for interfacial areas was then determined as a function of impeller speed, impeller diameter, gas flow rate, and concentration of the slurry. Decontamination factors were also determined.
Date: November 21, 1978
Creator: Sheppard, N.F.; Rizo-Patron, R.C. & Sun, W.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fundamental and semi-global kinetic mechanisms of hydrocarbon combustion. Annual report, October 1, 1977--September 30, 1978

Description: Aimed at understanding practical combustion environments, present modeling efforts have been hampered by difficulties related to coupling combustion chemistry to the complex fluid mechanics present. In an attempt to circumvent such difficulties the present research program is aimed at the development of simplified chemical kinetic models (usually termed global models) to represent the combustion chemistry. Initially aimed at simple hydrocarbon fuels the program is progressing to studies of more… more
Date: December 1, 1978
Creator: Dryer, F.L. & Glassman, I.
Item Type: Refine your search to only Report
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 1978

Description: The Penn State/DOE Coal Sample Bank was expanded to include seventeen lignite seams from Texas and two samples of a western Kentucky coal. A total of 253 characterized coal samples and 539 selected printouts of coal data were provided to the coal research community. Results of further coal fractionation studies confirm previous conclusions that fractions of widely differing characteristics can be developed in the laboratory, and indicate that with appropriate process development they could be p… more
Date: January 1, 1978
Creator: Spackman, W.; Davis, A.; Walker, P. L.; Lovell, H. L.; Essenhigh, R. H.; Vastola, F. J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Regenerative Process for Desulfurization of High Temperature Combustion and Fuel Gases. Quarterly Progress Report No. 8, January 1-March 31, 1978

Description: A highly reactive ..beta..-dicalcium silicate powder sample has been acquired from Professor D. Roy of Pennsylvania State University. We will use it in conjunction with our ash-binder pelletizing technique to form a highly regenerable and reactive sorbent for fluidized bed combustion. Other techniques of forming reactive silicates are also being studied. Simplified mathematical models have been developed for kiln regeneration based on the data with a small quartz rotary kiln reactor. The model … more
Date: January 1, 1978
Creator: Yang, R. T.; Albanese, A. S.; Chen, J. M.; Farber, G.; Kainz, F. B.; Pruzansky, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Model of leaf photosynthesis and the effects of simple gaseous sulfur compounds (H/sub 2/S and SO/sub 2/)

Description: A theoretical development is presented of a leaf model and the effects of simple sulfur compounds (H{sub 2}S and SO{sub 2}) on photosynthesis based upon biochemical mechanisms. The model is developed to interpret short-term fumigation experiments and to use with season-long fumigation experiments to assess the effects of these compounds on growth. The model is designed as a submodel in a growth-and-allocation model of the plant. Included in this development are an analysis of the diffusion of C… more
Date: August 10, 1978
Creator: Kercher, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Laser enhanced chemical reaction studies. Progress report, 1 July 1978--31 March 1979

Description: It was found that COF/sub 2/ multiphoton dissociates when pumped by a focused TEA CO/sub 2/ laser operating on the P(22) line of the 10.6..mu.. branch with an energy of approx. 500 mJ/pulse. F atoms were produced by the laser and their velocity was essentially thermal (300/sup 0/K). Parent fluorescence from highly excited COF/sup 2/ appeared near 2.5 ..mu... Serious errors can occur in the measurement of the rate of reaction of atomic fluorine with hydrogen at very low hydrogen pressure.
Date: January 1, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Synchrotron radiation and atom pair correlation functions in electrolyte solutions

Description: Despite the enormous effort invested in experimental determinations of the properties of water and aqueous solutions, understanding is still rudimentary. Many of the problems are consequences of a nonrigorous definition of interparticle interactions. It is now clear that after properly ion--water interactions in terms of probability functions of position and orientation it is possible to probe these interactions at molecular levels using diffraction experiments. The role of synchrotron x-ray ra… more
Date: January 1, 1978
Creator: Triolo, R. & D'Aprano, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Kinetics of silica deposition from simulated geothermal brines

Description: Supersaturated brines were passed through columns packed with several forms of silica (crystalline ..cap alpha.. quartz, polycrystalline ..cap alpha.. quartz, and porous Vycor). Also, silica deposition on ThO/sub 2/ microspheres and titanium powder was studied under controlled conditions of supersaturation, pH, temperature and salinity. The residence time was varied by adjustments of flow rate and column length. The silica contents of the input and effluent solutions were determined colorimetri… more
Date: January 1, 1978
Creator: Bohlmann, E.G.; Mesmer, R.E. & Berlinski, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Novel interpretations of carbon oxide reduction reactions. II. Over metal oxides

Description: A mechanism is proposed for the formation of methanol and other oxygenated organic products from carbon monoxide and hydrogen over metal oxide catalysts. These products are formed via the associative adsorption of carbon monoxide on the oxygen of the metal oxide surface, followed by reduction with metal activated hydrogen. Carbon dioxide is dissociated to chemisorbed CO and O. This explains why over-reduction of methanol catalysts results in the formation of hydrocarbons rather than methanol. T… more
Date: May 1, 1978
Creator: Sapienza, R S; Spaulding, L D; Lynch, J R & Sansone, M J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ellipsometry of anodic film growth

Description: An automated computer interpretation of ellisometer measurements of anodic film growth was developed. Continuous mass and charge balances were used to utilize more fully the time dependence of the ellipsometer data and the current and potential measurements. A multiple-film model was used to characterize the growth of films which proceeds via a dissolution--precipitation mechanism; the model also applies to film growth by adsorption and nucleation mechanisms. The characteristic parameters for f… more
Date: August 1, 1978
Creator: Smith, C.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a model and computer code to describe solar grade silicon production processes. First quarterly report

Description: It is proposed to develop a mathematical model and a computer code based on this model, which will allow prediction of the product distribution in chemical reactors in which gaseous silicon compounds are converted to condensed-phase silicon. The reactors to be modeled are flow reactors in which silane or one of the halogenated silanes is thermally decomposed or reacted with an alkali metal, H/sub 2/ or H atoms. Because the product of interest is particulate silicon, processes which must be mode… more
Date: February 1, 1978
Creator: Gould, R. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Appraisal of possible combustion hazards associated with a high-temperature gas-cooled reactor

Description: The report presents a study of combustion hazards that may be associated with the High Temperature Gas Cooled Reactor (HTGR) in the event of a primary coolant circuit depressurization followed by water or air ingress into the prestressed concrete reactor vessel (PCRV). Reactions between graphite and steam or air produce the combustible gases H/sub 2/ and/or CO. When these gases are mixed with air in the containment vessel (CV), flammable mixtures may be formed. Various modes of combustion inclu… more
Date: March 1, 1978
Creator: Palmer, H. B.; Sibulkin, M.; Strehlow, R. A. & Yang, C. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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TRU Waste Cyclone Drum Incinerator and Treatment System: April--June 1978

Description: The cyclone incinerator was operated throughout the quarter utilizing the new lid assembly. Burning rates averaged 35.1 kg/h. Early indications are that equipment life expectancies may also have lengthened. Efforts continue on selection of a system to dry sludges generated in the off-gas treatment system. A quality control program was started this quarter. The ash/cement matrix studies were completed. The 65/35 mixture proved to be the best for dry-cure pellets, and the 80/20 mixture produced t… more
Date: July 28, 1978
Creator: Klingler, L.M.; Batchelder, D.H. & Lewis, E.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of the methods utilized in OXIDE-3. [HTGR]

Description: OXIDE-3 is an evolving code developed to analyze the transient response of certain state variables of a High Temperature Gas Cooled Reactor (HTGR) during an accident involving the inleakage of steam and/or air into the helium primary coolant system. Primary tasks of the code are to calculate the primary coolant constituents as a function of time, their resultant chemical interaction with the graphite fuel elements, and their possible egress into the containment building. The report takes a crit… more
Date: March 1, 1978
Creator: Skalyo, J. Jr.; Epel, L.G. & Sastre, C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement of the penetration of liquid sodium into limestone concrete

Description: A pulse-echo ultrasonic system is used to monitor the movement of the interface created by pouring hot, liquid sodium onto limestone concrete. The essence of this system is to measure the time required for an acoustic signal, generated by the transmitting transducer, to traverse the specimen, reflect at the pool/concrete interface, and then retraverse the sample.
Date: January 1, 1978
Creator: Sutherland, H.J. & Kent, L.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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