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INCONEL 690 CORROSION IN WTP (WASTE TREATMENT PLANT) HLW (HIGH LEVEL WASTE) GLASS MELTS RICH IN ALUMINUM & BISMUTH & CHROMIUM OR ALUMINUM/SODIUM
Metal corrosion tests were conducted with four high waste loading non-Fe-limited HLW glass compositions. The results at 1150 C (the WTP nominal melter operating temperature) show corrosion performance for all four glasses that is comparable to that of other typical borosilicate waste glasses, including HLW glass compositions that have been developed for iron-limited WTP streams. Of the four glasses tested, the Bi-limited composition shows the greatest extent of corrosion, which may be related to its higher phosphorus content. Tests at higher suggest that a moderate elevation of the melter operating temperature (up to 1200 C) should not result in any significant increase in Inconel corrosion. However, corrosion rates did increase significantly at yet higher temperatures (1230 C). Very little difference was observed with and without the presence of an electric current density of 6 A/inch{sup 2}, which is the typical upper design limit for Inconel electrodes. The data show a roughly linear relationship between the thickness of the oxide scale on the coupon and the Cr-depletion depth, which is consistent with the chromium depletion providing the material source for scale growth. Analysis of the time dependence of the Cr depletion profiles measured at 1200 C suggests that diffusion of Cr …
Date:
November 5, 2009
Creator:
AA, KRUGER; Z, FENG; H, GAN & IL, PEGG
Object Type:
Report
System:
The UNT Digital Library
DEVELOPMENT OF THE H1700 SHIPPING PACKAGE
The H1700 Package is based on the DOE-EM Certified 9977 Packaging. The H1700 will be certified by the Packaging Certification Division of the National Nuclear Security Administration for the shipment of plutonium by air by the United Stated Military both within the United States and internationally. The H1700 is designed to ship radioactive contents in assemblies of Radioisotope Thermoelectric Generators (RTGs) or arrangements of nested food-pack cans. The RTG containers are designed and tested to remain leaktight during transport, handling, and storage; however, their ability to remain leaktight during transport in the H1700 is not credited. This paper discusses the design and special operation of the H1700.
Date:
June 5, 2009
Creator:
Abramczyk, G.; Loftin, B. & Mann, P.
Object Type:
Article
System:
The UNT Digital Library
Comments on Solid-Liquid Phase Equilibrium and Phase Diagram for the Ternary o-Nitrobenzoic Acid + m-Nitrobenzoic Acid + Ethanol System
Article commenting on a paper published in 2008 in the Journal of Chemical and Engineering Data discussing solid-liquid phase equilibrium and phase diagram for the ternary o-nitrobenzoic acid + m-nitrobenzoic acid + ethanol system.
Date:
June 5, 2009
Creator:
Acree, William E. (William Eugene)
Object Type:
Article
System:
The UNT Digital Library
The role of parallel heat transport in the relation between upstream scrape-off layer widths and target heat flux width in H-mode plasmas of NSTX.
The physics of parallel heat transport was tested in the Scrape-off Layer (SOL) plasma of the National Spherical Torus Experiment (NSTX) [M. Ono, et al., Nucl. Fusion 40, 557 (2000) and S. M. Kaye, et al., Nucl. Fusion 45, S168 (2005)] tokamak by comparing the upstream electron temperature (T{sub e}) and density (n{sub e}) profiles measured by the mid-plane reciprocating probe to the heat flux (q{sub {perpendicular}}) profile at the divertor plate measured by an infrared (IR) camera. It is found that electron conduction explains the near SOL width data reasonably well while the far SOL, which is in the sheath limited regime, requires an ion heat flux profile broader than the electron one to be consistent with the experimental data. The measured plasma parameters indicate that the SOL energy transport should be in the conduction-limited regime for R-R{sub sep} (radial distance from the separatrix location) < 2-3 cm. The SOL energy transport should transition to the sheath-limited regime for R-R{sub sep} > 2-3cm. The T{sub e}, n{sub e}, and q{sub {perpendicular}} profiles are better described by an offset exponential function instead of a simple exponential. The conventional relation between mid plane electron temperature decay length ({lambda}{sub Te}) and target …
Date:
January 5, 2009
Creator:
Ahn, J W; Boedo, J A; Maingi, R & Soukhanovskii, V A
Object Type:
Article
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 27, No. 5, Ed. 1 Thursday, February 5, 2009
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
February 5, 2009
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 27, No. 9, Ed. 1 Thursday, March 5, 2009
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
March 5, 2009
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 29, No. 42, Ed. 1 Thursday, November 5, 2009
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
November 5, 2009
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Plasma Diagnostic Calibration and Characterizations with High Energy X-rays
National Security Technologies’ High Energy X-ray (HEX) Facility is unique in the U.S. Department of Energy complex. The HEX provides fluorescent X-rays of 5 keV to 100 keV with fluence of 10^5–10^6 photons/cm^2/second at the desired line energy. Low energy lines can be filtered, and both filters and fluorescers can be changed rapidly. We present results of calibrating image plates (sensitivity and modulation transfer function), a Bremsstrahlung spectrometer (stacked filters and image plates), and the National Ignition Facility’s Filter- Fluorescer Experiment (FFLEX) high energy X-ray spectrometer. We also show results of a scintillator light yield and alignment study for a neutron imaging system.
Date:
June 5, 2009
Creator:
Ali, Zaheer
Object Type:
Article
System:
The UNT Digital Library
Accretion onto the first stellar mass black holes
The first stars, forming at redshifts z > 15 in minihalos with M {approx} 10{sup 5-6} M{sub {circle_dot}} may leave behind remnant black holes, which could conceivably have been the 'seeds' for the supermassive black holes observed at z {approx}< 7. We study remnant black hole growth through accretion, including for the first time the radiation emitted due to accretion, with adaptive mesh refinement cosmological radiation-hydrodynamical simulations. The effects of photo-ionization and heating dramatically affect the large-scale inflow, resulting in negligible mass growth. We compare cases with accretion luminosity included and neglected to show that accretion radiation drastically changes the environment within 100 pc of the black hole, increasing gas temperatures by an order of magnitude. Gas densities are reduced and further star formation in the same minihalo is prevented for the two hundred million years we followed. Without radiative feedback included most seed black holes do not gain mass as efficiently as has been hoped for in previous theories, implying that black hole remnants of Pop III stars in minihalos are not likely to be miniquasars. Most importantly, however, our calculations demonstrate that if these black holes are indeed accreting close to the Bondi-Hoyle rate with ten percent radiative …
Date:
August 5, 2009
Creator:
Alvarez, Marcelo A.; Wise, John H. & Abel, Tom
Object Type:
Article
System:
The UNT Digital Library
Measurement of CP Content and Time-Dependent CP Violation in B0 --> D*+D*- Decays
This dissertation presents the measurement of the Cp-odd fraction and time-dependent CP violation parameters for the B{sup 0} {yields} D*{sup +} D*{sup -} decay. These results are based on the full BABAR dataset of (467 {+-} 5) x 10{sup 6} B{bar B} pairs collected at the PEP-II B Factory at the Stanford Linear Accelerator Center. An angular analysis finds that the CP-odd fraction of the B{sup 0} {yields} D*{sup +} D*{sup -} decay is R{sub {perpendicular}} = 0.158 {+-} 0.028 {+-} 0.006, where the first uncertainty is statistical, and the second is systematic. A fit to the flavor-tagged, time-dependent, angular decay rate yields C{sub +} = 0.02 {+-} 0.12 {+-} 0.02; C{sub {perpendicular}} = 0.41 {+-} 0.50 {+-} 0.08; S{sub +} = -0.76 {+-} 0.16 {+-} 0.04; S{sub {perpendicular}} = -1.81 {+-} 0.71 {+-} 0.16, for the CP-odd ({perpendicular}) and CP-even (+) contributions. Constraining these two contributions to be the same results in C = 0.047 {+-} 0.091 {+-} 0.019; S = -0.71 {+-} 0.16 {+-} 0.03. These measurements are consistent with the Standard Model and with measurements of sin2{beta} from B{sup 0} {yields} (c{bar c})K{sup 0} decays.
Date:
January 5, 2009
Creator:
Anderson, Jacob M.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Guinea's 2008 Military Coup and Relations with the United States
This report analyzes developments since the Guinean military's seizure of power in December 2008, Guinea's relations with the United States, and U.S. policy in the wake of the coup. It also provides background on Guinean history and politics.
Date:
November 5, 2009
Creator:
Arieff, Alexis & Cook, Nicolas
Object Type:
Report
System:
The UNT Digital Library
P-986 Letter of Intent: Medium-Energy Antiproton Physics at Fermilab
Fermilab has long had the world's most intense antiproton source. Despite this, the opportunities for medium-energy antiproton physics at Fermilab have been limited in the past and - with the antiproton source now exclusively dedicated to serving the needs of the Tevatron Collider - are currently nonexistent. The anticipated shutdown of the Tevatron in 2010 presents the opportunity for a world-leading medium-energy antiproton program. We summarize the current status of the Fermilab antiproton facility and review some physics topics for which the experiment we propose could make the world's best measurements. Among these, the ones with the clearest potential for high impact and visibility are in the area of charm mixing and CP violation. Continued running of the Antiproton Source following the shutdown of the Tevatron is thus one of the simplest ways that Fermilab can restore a degree of breadth to its future research program. The impact on the rest of the program will be minor. We request a small amount of effort over the coming months in order to assess these issues in more detail.
Date:
February 5, 2009
Creator:
Asner, David M.; Phillips, Thomas J.; Apollinari, Giorgio; Broemmelsiek, Daniel R.; Brown, Charles N.; Christian, David C. et al.
Object Type:
Report
System:
The UNT Digital Library
Asymptotic Diffusion-Limit Accuracy of Sn Angular Differencing Schemes
In a previous paper, Morel and Montry used a Galerkin-based diffusion analysis to define a particular weighted diamond angular discretization for S{sub n}n calculations in curvilinear geometries. The weighting factors were chosen to ensure that the Galerkin diffusion approximation was preserved, which eliminated the discrete-ordinates flux dip. It was also shown that the step and diamond angular differencing schemes, which both suffer from the flux dip, do not preserve the diffusion approximation in the Galerkin sense. In this paper we re-derive the Morel and Montry weighted diamond scheme using a formal asymptotic diffusion-limit analysis. The asymptotic analysis yields more information than the Galerkin analysis and demonstrates that the step and diamond schemes do in fact formally preserve the diffusion limit to leading order, while the Morel and Montry weighted diamond scheme preserves it to first order, which is required for full consistency in this limit. Nonetheless, the fact that the step and diamond differencing schemes preserve the diffusion limit to leading order suggests that the flux dip should disappear as the diffusion limit is approached for these schemes. Computational results are presented that confirm this conjecture. We further conjecture that preserving the Galerkin diffusion approximation is equivalent to preserving the …
Date:
November 5, 2009
Creator:
Bailey, T S; Morel, J E & Chang, J H
Object Type:
Article
System:
The UNT Digital Library
Faculty Recital: 2009-03-05 - Tony Baker (trombone) & Nataliya Sukhina (piano)
Access:
Use of this item is restricted to the UNT Community
A faculty recital presented at the UNT College of Music Concert Hall.
Date:
March 5, 2009
Creator:
Baker, Tony (Trombonist) & Sukhina, Nataliya
Object Type:
Sound
System:
The UNT Digital Library
Tracking the Sun II: The Installed Cost of Photovoltaics in the U.S. from 1998-2008
Installations of solar photovoltaic (PV) systems have been growing at a rapid pace in recent years. In 2008, 5,948 MW of PV was installed globally, up from 2,826 MW in 2007, and was dominated by grid-connected applications. The United States was the world's third largest PV market in terms of annual capacity additions in 2008, behind Spain and Germany; 335 MW of PV was added in the U.S. in 2008, 293 MW of which came in the form of grid-connected installations. Despite the significant year-on-year growth, however, the share of global and U.S. electricity supply met with PV remains small, and annual PV additions are currently modest in the context of the overall electric system. The market for PV in the U.S. is driven by national, state, and local government incentives, including up-front cash rebates, production-based incentives, requirements that electricity suppliers purchase a certain amount of solar energy, and Federal and state tax benefits. These programs are, in part, motivated by the popular appeal of solar energy, and by the positive attributes of PV - modest environmental impacts, avoidance of fuel price risks, coincidence with peak electrical demand, and the location of PV at the point of use. Given the …
Date:
October 5, 2009
Creator:
Barbose, Galen L.; Wiser, Ryan; Peterman, Carla & Darghouth, Naim
Object Type:
Report
System:
The UNT Digital Library
Novel Low-Cost Process for the Gasification of Biomass and Low-Rank Coals
Farm Energy envisaged a phased demonstration program, in which a pilot-scale straw gasifier will be installed on a farm. The synthesis gas product will be used to initially (i) generate electricity in a 300 kW diesel generator, and subsequently (ii) used as a feedstock to produce ethanol or mixed alcohols. They were seeking straw gasification and alcohol synthesis technologies that may be implemented on farm-scale. The consortium, along with the USDA ARS station in Corvallis, OR, expressed interest in the dual-bed gasification concept promoted by WRI and Taylor Energy, LLC. This process operated at atmospheric pressure and employed a solids-circulation type oxidation/reduction cycle significantly different from traditional fluidized-bed or up-draft type gasification reactors. The objectives of this project were to perform bench-scale testing to determine technical feasibility of gasifier concept, to characterize the syngas product, and to determine the optimal operating conditions and configuration. We used the bench-scale test data to complete a preliminary design and cost estimate for a 1-2 ton per hour pilot-scale unit that is also appropriate for on-farm scale applications. The gasifier configuration with the 0.375-inch stainless steel balls recirculating media worked consistently and for periods up to six hours of grass feed. The other principle …
Date:
March 5, 2009
Creator:
Barton, Thomas
Object Type:
Report
System:
The UNT Digital Library
Personal narrative about family and early education
This is a personal narrative on family and early life. Dialect: Standard Boro
Date:
February 5, 2009
Creator:
Basumatary, Prafulla
Object Type:
Sound
System:
The UNT Digital Library
South Texas Catholic (Corpus Christi, Tex.), Vol. 44, No. 11, Ed. 1 Friday, June 5, 2009
Semi-monthly newspaper from Corpus Christi, Texas published by the Diocese of Corpus Christi that includes news of interest to Diocese members along with advertising.
Date:
June 5, 2009
Creator:
Beaton, Paula J.
Object Type:
Newspaper
System:
The Portal to Texas History
Supreme Court Nominations: Senate Floor Procedure and Practice, 1789-2009
This report discusses Senate procedure relating to Supreme Court nominations from 1789 to the present, but excluding the June 1, 2009 nomination of Sonia Sotomayor.
Date:
June 5, 2009
Creator:
Beth, Richard S. & Palmer, Betsy
Object Type:
Report
System:
The UNT Digital Library
Tax Reform: An Overview of Proposals in the 111th Congress
This report examines three main categories of tax reform: fundamental tax reform, tax reform based on the elimination of the individual alternative minimum tax (AMT), and proposals for reforming the corporate income tax in the 111th Congress.
Date:
March 5, 2009
Creator:
Bickley, James M.
Object Type:
Report
System:
The UNT Digital Library
Funnel cone for focusing intense ion beams on a target
We describe a funnel cone for concentrating an ion beam on a target. The cone utilizes the reflection characteristic of ion beams on solid walls to focus the incident beam andincrease beam intensity on target. The cone has been modeled with the TRIM code. A prototype has been tested and installed for use in the 350-keV K+ NDCX target chamber.
Date:
October 5, 2009
Creator:
Bieniosek, F.M.; Henestroza, E. & Ni, P.
Object Type:
Article
System:
The UNT Digital Library
Faculty and Student Teams and National Laboratories: Expanding the Reach of Research Opportunities and Workforce Development
The Faculty and Student Teams (FaST) Program, a cooperative effort between the US Department of Energy (DOE) Office of Science and the National Science Foundation (NSF), brings together collaborative research teams composed of a researcher at Brookhaven National Laboratory, and a faculty member with two or three undergraduate students from a college or university. Begun by the Department of Energy in 2000 with the primary goal of building research capacity at a faculty member's home institution, the FaST Program focuses its recruiting efforts on faculty from colleges and universities with limited research facilities and those institutions that serve populations under-represented in the fields of science, engineering and technology, particularly women and minorities. Once assembled, a FaST team spends a summer engaged in hands-on research working alongside a laboratory scientist. This intensely collaborative environment fosters sustainable relationships between the faulty members and BNL that allow faculty members and their BNL colleagues to submit joint proposals to federal agencies, publish papers in peer-reviewed journals, reform local curriculum, and develop new or expand existing research labs at their home institutions.
Date:
August 5, 2009
Creator:
Blackburn,N.; White, K. & Stegman, M.
Object Type:
Report
System:
The UNT Digital Library
The United Nations Convention on the Rights of the Child: Background and Policy Issues
This report provides an overview of the United Nations Convention of the Rights of the Child's (CRC) background and structure and examines evolving U.S. policy toward the Convention, including past and current Administration positions and congressional perspectives. It also highlights issues for the 112th Congress, including the Convention's possible impact on federal and state laws, U.S. sovereignty, parental rights, and U.S. family planning and abortion policy.
Date:
August 5, 2009
Creator:
Blanchfield, Luisa
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with Robert Bland, December 5, 2009
The National Museum of the Pacific War presents an interview with Robert Bland. Bland joined the Navy in April of 1944. He served as Signalman Third-Class aboard the SS Francis Preston Blair (1943). They traveled to Australia, New Zealand, India and Manila picking up and delivering cargo. Bland served aboard the ship until it got stranded on Saumarez Reef in the Coral Sea during a cyclone in 1945. Bland continued his service after the war ended, receiving his discharge in May of 1946.
Date:
December 5, 2009
Creator:
Bland, Robert
Object Type:
Sound
System:
The Portal to Texas History