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Office of Scientific & Technical Information Technical Reports
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125
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60
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41
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37
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33
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Texas Parks & Wildlife News, February 13, 1980
Weekly newsletter discussing natural resources, parks, hunting and fishing, and other information related to the outdoors in Texas.
Date:
February 13, 1980
Creator:
Texas. Parks and Wildlife Department.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Apparent Observations Ionic Sound Waves in an Arc Plasma
Oscillations have been observed in a magnetically supported cylindrical rod of plasma. This rod of plasma can be the discharge occurring in the defining aperture of a Mode II, pressure gradient arc. Similar oscillations can also occur in the column of a Mode I arc. These oscillations appear to be the mechanism that drives the Mode II blowup phenomena.
Date:
February 13, 1961
Creator:
Alexeff, I. & Neidigh, R. V.
Object Type:
Report
System:
The UNT Digital Library
Processing of Beryllium Oxide Fuels
Preliminary results from experiments on the dissolution of beryllium metal and sintered UO2-BeO fuel pellets are reported. In all cases the pellets were fired in hydrogen at 1650-1800°C. Uranium, from UO2-BeO pellets containing more than 60% UO2, is readily leached with boiling 6-13 M HNO3 in about 6 hr. The BeO in these pellets dissolves only slowly in nitric acid; however, in 8 M HNO3-0.2M NaF, it dissolves at about the same rate as the UO2. Sintered pellets containing less than 10% UO2 do not dissolve rapidly in common aqueous reagents. The highest rates are obtained in boiling acidic fluoride solutions; e.g., sintered BeO and BeO-8% UO2 are dissolved initially at a rate of about 1.7 mg min-1cm-2 (13 mils/hr) in boiling 5.8 M NH4HF2.
Date:
February 13, 1961
Creator:
Warren, K. S. & Perris, L. M.
Object Type:
Report
System:
The UNT Digital Library
Preparation of Thorium Oxide from ORNL Thorex Thorium Nitrate
Thorium nitrate, recovered from irradiated thorium metal processed in the ORNL Thorex Pilot Plant, was converted to thorium oxide and then to the fluoride in one pilot-plant-scale and two laboratory-scale runs. Activity distributions, decontamination factors, and safety of the process are treated. (D.L.C.)
Date:
February 13, 1957
Creator:
McDuffee, W. T. & Yarbro, O. O.
Object Type:
Report
System:
The UNT Digital Library
Newsletter of Texas State Representative Ernest Bailes: Volume 1, Issue 2, February 2017
Newsletter of Ernest Bailes for his constituents in district 18 discussing news, activities, and various updates related to work in the Texas legislature. It focuses on Bailes' committee assignments, handgun issues, school funding, open-enrollment to charter schools, support for district 18, and the Texas Association of School Administrators.
Date:
February 13, 2017
Creator:
Bailes, Ernest James, IV
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Bulletin on Texas State Finance: 1987, Number 3
Periodic bulletin analyzing issues related to Texas legislation. This issue focuses on policy recommendations.
Date:
February 13, 1987
Creator:
Texas Research League
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Maritime Loop Irrradiation Program - Savannah I Fuel Irradiation: Progress Report First and Second Quarters, July, 1960-January, 1961
The General Electric Company is proceeding with an irradiation program to proof test a representative array of Savannah I fuel rods. Irradiation of a test assembly containing Savannah I fuel rods has begun and it is proposed that the results of this irradiation will permit an advance evaluation of the fuel performance and fuel burnup in the Savannah I reactor. This report covers the first two quarters of the reporting period. All aspects of the subject program have been consolidated and applicable portions are discussed in some detail.
Date:
February 13, 1961
Creator:
Marburger, I. L.
Object Type:
Report
System:
The UNT Digital Library
Evaluation of Gold and Gold Alloy Bearings in Pump Process
The use of process-solution-lubricated sleeve bearings in rotating equipment is quite extensive at H.A.P.O. The difficulty or impossibility of providing contact maintenance, the poor lubricating qualities and corrosive natures of most of the process solutions, in addition to radioactivity, impose stringent restrictions on the selection of materials of construction of these bearings. Prototypical evaluation of materials indicating suitable characteristics in preliminary testing, both in the Corrosion Laboratory and in the bearing test machines, is necessary to establish behavior and compatibility under actual or simulated process conditions. These preliminary tests showed that gold and gold alloys might be used as satisfactory materials for pump bearings under certain conditions. This report presents the test results obtained while testing bearings in pumps prototypical or identical with process plant equipment.
Date:
February 13, 1956
Creator:
Dunn, J.
Object Type:
Report
System:
The UNT Digital Library
Cerium and Plutonium Dioxide - Notes on Reduction to Massive Metal
In reduction reactions of CeOâ‚‚, with calcium and a CaClâ‚‚ flux, the use of vibrational energy was shown to have a marked effect on the yield of coalesced metal. Buttons of 40 to 50% theoretical yield were obtained from the vibrated reductions. As the flux concentration is decreased, the slag becomes more viscous containing undissolved CaO. The undissolved CaO present prevents the metal from completely coalescing, but the metal can be recovered from the slag and coalesced under CaClâ‚‚ containing a small amount of calcium to reduce any oxide skin present. Cerium pellet yields of 50 to 60% metal were obtained by the procedure and were not difficult to handle in air. Cerium was used as a stand-in material for plutonium.
Date:
February 13, 1956
Creator:
Tolley, W. B.
Object Type:
Report
System:
The UNT Digital Library
Clevis Attachment for Plows.
Patent for an agricultural plow attachment that allows for more precision concerning the measurement of depth of the plow point against different types of terrain/soil conditions.
Date:
February 13, 1920
Creator:
Wolter, Fred W.
Object Type:
Patent
System:
The Portal to Texas History
IV. Production and Heating
Calculations are developed which indicate the Pu production is an infinite lattice
Date:
February 13, 1951
Creator:
Brown, Harold
Object Type:
Report
System:
The UNT Digital Library
Decontamination Program Task II. Volume 1, Contamination and Decontamination in Nuclear Power Reactors
Abstract: A survey of the problem of reactor system contamination by radioactive material and methods that have been employed to remove the material was carried out. Following this survey, an investigation of chemical solutions was undertaken to find one which might be successfully employed in the decontamination of a stainless steel steam generator. From a preliminary screening, the most promising chemical method from the view point of minimum corrosion and maximum decontamination is a caustic permanganate treatment followed by and acid rinse.
Date:
February 13, 1959
Creator:
Zegger, John L. & Pancer, Guyon P.
Object Type:
Report
System:
The UNT Digital Library
Decontamination Program Task II. Volume III, Recommended Procedure for Decontamination of a Stainless Steel Steam Generator
Abstract: A decontamination procedure for a stainless steel steam generator similar to the APPR-1 using a fill-flush application of a caustic permanganate-citrate combination solution is recommended. The isolation of the steam generator is to be accomplished by means of specially designed plugs at the reactor vessel outlet and at the primary coolant pumps. Anticipated results, including corrosion rates and decontamination factors, are presented.
Date:
February 13, 1959
Creator:
Pancer, Guyon P. & Zegger, John L.
Object Type:
Report
System:
The UNT Digital Library
Acid measurements via near-infrared spectroscopy
We were able to predict acid concentration to {plus minus}0.08M HNO{sub 3}. In the presence of Al{sup 3} interference, the prediction dropped to {plus minus}0.29 mols/liter over the range 0 to 9M HNO{sub 3}. Temperature affects the prediction of acid adversely and would have to be modelled out or the sample cell thermostated prior to using this method. 10 refs, 12 figs.(DLC)
Date:
February 13, 1991
Creator:
Buchanan, B. R.
Object Type:
Report
System:
The UNT Digital Library
Semiautomatic dosimeter loader
A brief description of the construction and operation of the semiautomatic dosimeter loader for TLD badges now in use at Lawrence Livermore Laboratory is given.
Date:
February 13, 1976
Creator:
Kadi, W.
Object Type:
Report
System:
The UNT Digital Library
Texas Preventable Disease News, Volume 48, Number 6, February 13, 1988
Newsletter of the Texas Bureau of Disease Control and Epidemiology discussing the news, activities, and events of the organization and other information related to health in Texas.
Date:
February 13, 1988
Creator:
Texas. Bureau of Disease Control and Epidemiology.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Including dislocation flux in a continuum crystal plasticity model to produce size scale effects
A novel model has been developed to capture size scale and gradient effects within the context of continuum crystal plasticity by explicitly incorporating details of dislocation transport, coupling dislocation transport to slip, evolving spatial distributions of dislocations consistent with the flux, and capturing the interactions among various dislocation populations. Dislocation flux and density are treated as nodal degrees of freedom in the finite element model, and they are determined as part of the global system of equations. The creation, annihilation and flux of dislocations between elements are related by transport equations. Crystallographic slip is coupled to the dislocation flux and the stress state. The resultant gradients in dislocation density and local lattice rotations are analyzed for geometrically necessary and statistically stored dislocation contents that contribute to strength and hardening. Grain boundaries are treated as surfaces where dislocation flux is restricted depending on the relative orientations of the neighboring grains. Numerical results show different behavior near free surfaces and non-deforming surfaces resulting from differing levels of dislocation transmission. Simulations also show development of dislocation pile-ups at grain boundaries and an increase in flow strength reminiscent of the Hall-Petch model. The dislocation patterns have a characteristic size independent of the numerical discretization.
Date:
February 13, 2004
Creator:
Becker, R.; Arsenlis, A.; Bulatov, V. V. & Parks, D. M.
Object Type:
Article
System:
The UNT Digital Library
Dynamics of Boreal Summer Intraseasonal Variability
None
Date:
February 13, 2004
Creator:
Sperber, K.
Object Type:
Article
System:
The UNT Digital Library
Nuclear Energy Research Initiative Program (NERI) Quarterly Progress Report; New Design Equations for Swelling and Irradiation Creep in Generation IV Reactors
The objectives of this research project are to significantly extend the theoretical foundation and the modeling of radiation-induced microstructural changes in structural materials used in Generation IV nuclear reactors, and to derive from these microstructure models the constitutive laws for void swelling, irradiation creep and stress-induced swelling, as well as changes in mechanical properties. The need for the proposed research is based on three major developments and advances over the past two decades. First, new experimental discoveries have been made on void swelling and irradiation creep which invalidate previous theoretical models and empirical constitutive laws for swelling and irradiation creep. Second, recent advances in computational methods and power make it now possible to model the complex processes of microstructure evolution over long-term neutron exposures. Third, it is now required that radiation-induced changes in structural materials over extended lifetimes be predicted and incorporated in the design of Generation IV reactors. Our approach to modeling and data analysis is a dual one in accord with both the objectives to simulate the evolution of the microstructure and to develop design equations for macroscopic properties. Validation of the models through data analysis is therefore carried out at both the microscopic and the macroscopic levels. …
Date:
February 13, 2003
Creator:
Wolfer, W. G.; Surh, M. P.; Garner, F. A.; Chrzan, D. C.; Schaldach, C. & Sturgeon, J. B.
Object Type:
Report
System:
The UNT Digital Library
Update of ENDL U(n,2n), U(n,gamma), U(n,f) Evaluations
The authors are in the re-evaluating of all the actinide cross section evaluations in LLNL's ENDL database, starting with uranium and focusing on inventory changing reactions. This article describes their first serious pass at updating the uranium cross section data, including estimates of cross section uncertainties. Furthermore, they are developing new tools to automate the re-evaluation and this article contains some preliminary results from these codes, namely the {sup 235}U(n, 2n) and {sup 238}U(n, 2n) evaluations.
Date:
February 13, 2004
Creator:
Beck, B.; Brown, D. A. & McNabb, D. P.
Object Type:
Report
System:
The UNT Digital Library
Assessment of Industrial VOC Gas-Scrubber Performance
Gas scrubbers for air-pollution control of volatile organic compounds (VOC) cover a wide range of technologies. In this review, we have attempted to evaluate the single-pass scrubber destruction and removal efficiencies (DREs) for a range of gas-scrubber technologies. We have focused primarily on typical industrial DREs for the various technologies, typical problems, and any DRE-related experiential information available. The very limited literature citations found suggest significant differences between actual versus design performance in some technologies. The potentially significant role of maintenance in maintaining DREs was also investigated for those technologies. An in-depth portrayal of the entire gas scrubbing industry is elusive. Available literature sources suggest significant differences between actual versus design performance in some technologies. Lack of scrubber system maintenance can contribute to even larger variances. ''Typical'' industrial single-pass performance of commonly used VOC gas scrubbers generally ranged from {approx}80 to 99%. Imperfect solid and/or liquid particulates capture (possibly as low as 95% despite design for 99+% capture efficiency) can also lead to VOC releases. Changing the VOC composition in the gas stream without modifying scrubber equipment or operating conditions could also lead to significant deterioration in attainable destruction and removal efficiencies.
Date:
February 13, 2004
Creator:
Saito, Hiroshi H.
Object Type:
Report
System:
The UNT Digital Library
Wet-Etch Figuring Optical Figuring by Controlled Application of Liquid Etchant
WET-ETCH FIGURING (WEF) is an automated method of precisely figuring optical materials by the controlled application of aqueous etchant solution. This technology uses surface-tension-gradient-driven flow to confine and stabilize a wetted zone of an etchant solution or other aqueous processing fluid on the surface of an object. This wetted zone can be translated on the surface in a computer-controlled fashion for precise spatial control of the surface reactions occurring (e.g. chemical etching). WEF is particularly suitable for figuring very thin optical materials because it applies no thermal or mechanical stress to the material. Also, because the process is stress-free the workpiece can be monitored during figuring using interferometric metrology, and the measurements obtained can be used to control the figuring process in real-time--something that cannot be done with traditional figuring methods.
Date:
February 13, 2001
Creator:
Britten, J
Object Type:
Report
System:
The UNT Digital Library
Evaluation and Optimization of MTBE Biodegradation in Aquifers, Final Report
This study was focused on meeting the following objectives concerning the process of methyl tertiary butyl ether (MTBE) biodegradation, with the goal of optimizing this process in situ: 1. Assess whether intrinsic bioattenuation of MTBE is feasible under aerobic conditions across several contaminated sites. 2. Determine the effect of co-contaminants, specifically water-soluble gasoline components (most notably benzene, toluene, ethylbenzene and xylenes [BTEX]) on MTBE biodegradation. 3. Determine whether microbial and/or chemical factors contribute to different MTBE degradative activities. 4. Isolate and characterize MTBE-degrading microorganisms from sediments in which MTBE biodegradation was observed.
Date:
February 13, 2004
Creator:
Legler, T; Balser, L; Koester, C & Wilson, W
Object Type:
Report
System:
The UNT Digital Library
Final Report on Project 01-ERD-017 ''Smart Nanostructures From Computer Simulations''
This project had two main objectives. The first major goal was to develop new, powerful computational simulation capabilities. It was important that these tools have the combination of the accuracy needed to describe the quantum mechanical nature of nanoscale systems and the efficiency required to be applied to realistic, experimentally derived materials. The second major goal was to apply these computational methods to calculate and predict the properties of quantum dots--initially composed of silicon, but then of other elements--which could be used to build novel nanotechnology devices. The driving factor of our purpose has been that, through the development and successful application of these tools, we would generate a new capability at LLNL that could be used to make nanostructured materials ''smarter'', e.g., by selectively predicting how to engineering specific, desired properties. To carry out the necessary work to successfully complete this project and deliver on our goals, we established a two-pronged effort from the beginning: (1) to work on developing new, more efficient algorithms and quantum simulation tools, and (2) to solve problems and make predictions regarding properties of quantum dots which were being studied experimentally here at Livermore.
Date:
February 13, 2004
Creator:
Grossman, J C & Williamson, A J
Object Type:
Report
System:
The UNT Digital Library