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Improvement and Verification of Fast Reactor Safety Analysis Techniques. Progress Report, October 1, 1977--December 31, 1977

Description: The critical superficial vapor velocity was measured for an open vessel system with chemically produced internal heat. The measured value was within experimental error of the value predicted by the Kutateladze stability criterion. The greatest error induced was in the measurement of the energy generation rate. The effects of mixtures were taken into account. Further work suggestions are also presented.
Date: January 1, 1977
Creator: Barker, D. H. & Wheeler, P. A.
Partner: UNT Libraries Government Documents Department
open access

Investigation of a fossil geothermal system, Hamblin-Cleopatra Volcano, Clark County, Nevada. Final technical report

Description: The Hamblin-Cleopatra volcano, selected for study because erosion and fault displacement have exposed the entire volcanic succession, the intrusive core, a radial dike systems, and sedimentary and volcanic rocks that predate and postdate the volcano, was investigated to estimate the proportions of igneous materials forming lava flows, pyroclastic deposits, intrusive bodies, and reworked debris. Chemical changes in the magma throughout the active period of the volcano were documented. The geothe… more
Date: July 28, 1986
Creator: Barker, D.S.
Partner: UNT Libraries Government Documents Department
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Improvement and Verification of Fast Reactor Safety Analysis Techniques. Progress Report, October 1, 1979-March 31, 1980. [Lmfbr]

Description: Several of the time dependent properties of the dimethyl sulfoxide-acetyl chloride reaction system were determined. The volume of a wax cylinder melted by conducting a dimethyl sulfoxide-acetyl chloride reaction in the vessel was compared with the melted volume calculated using several different heat transfer correlations. It was found that a laminar flow at the wall model provided the most accurate calculation of the observed melted volume.
Date: January 1, 1980
Creator: Barker, D. H. & Wiberg, D. V.
Partner: UNT Libraries Government Documents Department
open access

Improvement and Verification of Fast Reactor Safety Analysis Techniques. Progress Report, July 1-September 30, 1979

Description: The physical properties of the initial and final liquid phase of the Dimethyl Sulfoxide-Acetyl Chloride reaction system with either Acetone or Benzene as solvent are reported together with the method of collection. These properties include heat capacity, thermal conductivity, viscosity, density, heat of vaporization and thermal coefficient of volumetric expansion. A method of interpolation between initial and final liquid properties is described.
Date: January 1, 1979
Creator: Barker, D. H. & Wiberg, D. V.
Partner: UNT Libraries Government Documents Department
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Improvement and Verification of Fast Reactor Safety Analysis Techniques. Progress Report, April 1, 1979-June 30, 1979

Description: This report details a mathematical model for the dissipation of heat from an internally heated liquid pool which is contained in a hollow cylinder of finite inside and outside diameter. The model includes a temperature profile for the previously described cylinder, empirical correlations for Nusselt numbers at the walls of the container and a film theory correction of the heat transfer coefficients for mass transfer. Also included in this report is a description of the experimental work conduct… more
Date: January 1, 1979
Creator: Barker, D. H. & Wiberg, D. V.
Partner: UNT Libraries Government Documents Department
open access

Molecular mapping of chromosomes 17 and X

Description: Progress toward the construction of high density genetic maps of chromosomes 17 and X has been made by isolating and characterizing a relatively large set of polymorphic probes for each chromosome and using these probes to construct genetic maps. We have mapped the same polymorphic probes against a series of chromosome breakpoints on X and 17. The probes could be assigned to over 30 physical intervals on the X chromosome and 7 intervals on 17. In many cases, this process resulted in improved ch… more
Date: January 15, 1991
Creator: Barker, D. F.
Partner: UNT Libraries Government Documents Department
open access

Improvement and Verification of Fast Reactor Safety Analysis Techniques. Progress Report, 1 July 1977--30 September 1977

Description: A calorimeter was designed and built to measure reaction power in the range where liquid is boiling. Measurements made with the new calorimeter at a concentration just lower than what would produce boiling (3m) was about 10% lower than those measured using the Precision Calorimeter. A heat loss of about 40% due to a non-adiabatic vessel was determined by comparing the reaction power in solution of the reaction vessel to that of the calorimeter. A closed reaction vessel was designed to observe t… more
Date: January 1, 1977
Creator: Barker, D. H. & Wheeler, P. A.
Partner: UNT Libraries Government Documents Department
open access

Improvement and Verification of Fast Reactor Safety Analysis Techniques. Progress Report, July 1, 1978--September 30, 1978

Description: This report deals with the simulation of a HCDA in a LMFBR using chemical heating. The chemicals used were acetyl chloride and dimethyl sulfoxide in a benzene base. In our last report, it was shown that for high concentrations of the two chemicals, vapor velocities above 8 cm/sec and void fractions above 50% were obtained in a closed system. However, at lower concentrations, such as 4 M, no void fraction was obtained. During this period of work, a closed system with a cooling coil was used to p… more
Date: January 1, 1978
Creator: Barker, D. H.; Wheeler, P. & Bybee, D. J.
Partner: UNT Libraries Government Documents Department
open access

Improvement and Verification of Fast Reactor Safety Analysis Techniques. Progress Report, October 1, 1978--December 31, 1978

Description: The effect of using Acetone, Benzene, or Toluene as a solvent material in a 4M, Acetyl Chloride-Dimethyl Sulfoxide reaction system was investigated. Maximum void fraction and length of time with void greater than 50% were compared. The Acetone system produced the largest maximum void and longest time above 50% void followed by Benzene and Toluene in descending order. Seventeen waxes were tested and compared to determine a material suitable to simulate reactor containment materials (e.g., steel,… more
Date: January 1, 1978
Creator: Barker, D. H. & Wiberg, D. V.
Partner: UNT Libraries Government Documents Department
open access

Tomographic data developed using the ABEM RAMAC borehole radar system at the Mixed Waste Landfill Integrated Demonstration

Description: The ABEM RAMAC borehole radar system was run as part of the Mixed Waste Landfill Integrated Demonstration for Sandia National Laboratories at Kirtland AFB. Tomograms were created between three test boreholes-UCAP No. 1, UCAP No. 2, and UCAP No. 3. These tomograms clearly delineate areas of amplitude attenuation and residual time of arrival or slowness differences. Plots for slowness were made using both the maximum and minimum of the first arrival pulse. The data demonstrates that the ABEM RAMA… more
Date: February 18, 1994
Creator: MacLeod, G. A.; Barker, D. L. & Molnar, S.
Partner: UNT Libraries Government Documents Department
open access

Molecular mapping of chromosomes 17 and X. Progress report

Description: Progress toward the construction of high density genetic maps of chromosomes 17 and X has been made by isolating and characterizing a relatively large set of polymorphic probes for each chromosome and using these probes to construct genetic maps. We have mapped the same polymorphic probes against a series of chromosome breakpoints on X and 17. The probes could be assigned to over 30 physical intervals on the X chromosome and 7 intervals on 17. In many cases, this process resulted in improved ch… more
Date: January 15, 1991
Creator: Barker, D. F.
Partner: UNT Libraries Government Documents Department
open access

Molecular mapping of chromosomes 17 and X. Progress report

Description: The basic aims of this project are the construction of high density genetic maps of chromosomes 17 and X and the utilization of these maps for the subsequent isolation of a set of physically overlapping DNA segment clones. The strategy depends on the utilization of chromosome specific libraries of small (1--15 kb) segments from each of the two chromosomes. Since the time of submission of our previous progress report, we have refined the genetic map of markers which we had previously isolated fo… more
Date: December 31, 1989
Creator: Barker, D. F.
Partner: UNT Libraries Government Documents Department
open access

Improvement and Verification of Fast Reactor Safety Analysis Techniques. Progress Report, October 1, 1976--December 31, 1976

Description: Work-energy calculations based on the disassembly results from VENUS-II have been compared to experimental work-energy measurements for the Kiwi-TNT, SNAPTRAN-2 and SNAPTRAN-3 tests. The influence of equation-of-state uncertainties on work-energy calculations using the ANL-WRK subprogram has been examined. Initial results of a VENUS-SIMMER study designed to define the range of VENUS applicability are presented. The initial phases of the feasibility study of using chemical reactions as simulant-… more
Date: January 1, 1977
Creator: Barker, D. H.
Partner: UNT Libraries Government Documents Department
open access

Improvement and Verification of Fast Reactor Safety Analysis Techniques. Progress Report, June 1, 1976--September 30, 1976

Description: VENUS-II calculations of the Kiwi-TNT, SNAPTRAN-2 and SNAPTRAN-3 experiments have been completed. These studies show good agreement between calculated and experimental fission energy release for all three experiments. Heat transfer effects were scoped in the Kiwi-TNT case and were shown to be readily capable of explaining the discrepancy noted between the experimental and calculated fission energy releases. Extensive sensitivity studies were conducted to demonstrate the relative insensitivity o… more
Date: November 1, 1976
Creator: Jackson, J. F.; Bott, T. F. & Barker, D. H.
Partner: UNT Libraries Government Documents Department
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Improvement and Verification of Fast Reactor Safety Analysis Techniques. Progress Report, April 1, 1977--June 30, 1977

Description: An energy balance was made to determine the effect of the latent heat of vaporization of fuel and steel on temperature changes of the fuel and steel. Calorimeter runs were made on the reaction of DMSO with acetyl chloride to determine the effects of concentration and injection speed on the power of the reaction. Within a limited range, the power is proportional to both the concentration and injection rate. A plot of void fraction as a function of concentration was made. The concentration at whi… more
Date: January 1, 1977
Creator: Barker, D. H. & Wheeler, P. A.
Partner: UNT Libraries Government Documents Department
open access

Molecular mapping of chromosomes 17 and X

Description: The basic aims of this project are the construction of high density genetic maps of chromosomes 17 and X and the utilization of these maps for the subsequent isolation of a set of physically overlapping DNA segment clones. The strategy depends on the utilization of chromosome specific libraries of small (1--15 kb) segments from each of the two chromosomes. Since the time of submission of our previous progress report, we have refined the genetic map of markers which we had previously isolated fo… more
Date: January 1, 1989
Creator: Barker, D. F.
Partner: UNT Libraries Government Documents Department
open access

Effect of composition on the processing and properties of sintered reaction-bonded silicon nitride

Description: The type of silicon powder and sintering additive were found to influence the processing and final mechanical properties of sintered reaction bonded silicon nitride. High purity silicon powders produced low {alpha}-Si{sub 3}N{sub 4} content during nitridation. The Si powder type had no apparent effect on densification. More complete nitridation and higher room temperature mechanical properties were observed for the Si powders with higher Fe contents. However, the higher Fe contents resulted in … more
Date: April 1, 1996
Creator: Tiegs, T. N.; Kiggans, J. O.; Montgomery, F. C.; Lin, H. T.; Barker, D. L.; Snodgrass, J. D. et al.
Partner: UNT Libraries Government Documents Department
open access

Effect of powder characteristics on the {alpha}-TO-{beta} Si{sub 3}N{sub 4} transformation kinetics

Description: {beta}-phase nucleation and growth is an important step in the microstructure development of Si{sub 3}N{sub 4} ceramics. Samples containing different powder types, sintering additives and {alpha}/{beta} ratios were heated at intermediate temperatures and times to monitor the phase changes taking place. The rate of transformation was mainly dependent on the powder surface area and starting {beta}-content. It was observed that additions of {beta}-Si{sub 3}N{sub 4} increased the rate of transforma… more
Date: April 1, 1997
Creator: Tiegs, T. N.; Montgomery, F. C.; Schroeder, J. L.; Barker, D. L. & Menchhofer, P. A.
Partner: UNT Libraries Government Documents Department
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