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3-D Thermal Evaluations for a Fueled Experiment in the Advanced Test Reactor
The DOE Advanced Fuel Cycle Initiative and Generation IV reactor programs are developing new fuel types for use in the current Light Water Reactors and future advanced reactor concepts. The Advanced Gas Reactor program is planning to test fuel to be used in the Next Generation Nuclear Plant (NGNP) nuclear reactor. Preliminary information for assessing performance of the fuel will be obtained from irradiations performed in the Advanced Test Reactor large “B” experimental facility. A test configurations has been identified for demonstrating fuel types typical of gas cooled reactors or fast reactors that may play a role in closing the fuel cycle or increasing efficiency via high temperature operation Plans are to have 6 capsules, each containing 12 compacts, for the test configuration. Each capsule will have its own temperature control system. Passing a helium-neon gas through the void regions between the fuel compacts and the graphite carrier and between the graphite carrier and the capsule wall will control temperature. This design with three compacts per axial level was evaluated for thermal performance to ascertain the temperature distributions in the capsule and test specimens with heating rates that encompass the range of initial heat generation rates.
Date:
October 1, 2004
Creator:
Ambrosek, Richard; Chang, Gray & Utterbeck, Debra
Object Type:
Article
System:
The UNT Digital Library
14th Workshop on Crystalline Silicon Solar Cells& Modules: Materials and Processes; Summary of Discussion Sessions
The 14th Workshop discussion sessions addressed funding needs for Si research and for R&D to enhance U.S. PV manufacturing. The wrap-up session specifically addressed topics for the new university silicon program. The theme of the workshop, Crystalline Silicon Solar Cells: Leapfrogging the Barriers, was selected to reflect the astounding progress in Si PV technology during last three decades, despite a host of barriers and bottlenecks. A combination of oral, poster, and discussion sessions addressed recent advances in crystal growth technology, new cell structures and doping methods, silicon feedstock issues, hydrogen passivation and fire through metallization, and module issues/reliability. The following oral/discussion sessions were conducted: (1) Technology Update; (2) Defects and Impurities in Si/Discussion; (3) Rump Session; (4) Module Issues and Reliability/Discussion; (5) Silicon Feedstock/Discussion; (6) Novel Doping, Cells, and Hetero-Structure Designs/Discussion; (7) Metallization/Silicon Nitride Processing/Discussion; (8) Hydrogen Passivation/Discussion; (9) Characterization/Discussion; and (10) Wrap-Up. This year's workshop lasted three and a half days and, for the first time, included a session on Si modules. A rump session was held on the evening of August 8, which addressed efficiency expectations and challenges of c Si solar cells/modules. Richard King of DOE and Daren Dance of Wright Williams& Kelly (formerly of Sematech) spoke …
Date:
October 1, 2004
Creator:
Sopori, B.; Tan, T.; Sinton, R. & Swanson, D.
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 34, No. 5, Ed. 1 Friday, October 1, 2004
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 1, 2004
Creator:
Delaney, Darcy
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
2003 SITE ENVIRONMENTAL REPORT
Each year, Brookhaven National Laboratory (BNL), a multi-program national laboratory, prepares an annual Site Environmental Report (SER) in accordance with Order 231.1A, Environment, Safety and Health Reporting, of the U.S. Department of Energy (DOE). The SER is written to inform outside regulators, the public, and Laboratory employees of BNL's environmental performance during the calendar year in review, and to summarize BNL's on-site environmental data; environmental management performance; compliance with applicable DOE, Environmental Protection Agency (EPA), state, and local regulations; and environmental, restoration, and surveillance monitoring programs. BNL has prepared annual SERs since 1971 and has documented nearly all of its environmental history since the Laboratory's inception in 1947. This report is intended to be a technical document. It is available in print and as a downloadable file on the BNL web page at http://www.bnl.ser.htm. A summary of the SER is also prepared each year to provide a general overview, and is distributed with a CD version of the full-length SER. The summary supports BNL's educational and community outreach program.
Date:
October 1, 2004
Creator:
DIVISION, ENVIRONMENT AND WASTE MANAGMENT SERVICES & AL., ET
Object Type:
Report
System:
The UNT Digital Library
2nd International Conference on Pathways, Networks, and Systems: Theory and Experiments
With the availability of whole genome sequences, research attention shifts from gene sequences and genome content to protein functions and systems biology. Genes comprise a major component of the ''parts list'' that is required for building and maintaining of living organisms. Genome DNA sequences reveal the genetic inventory for a rapidly increasing number of species. Defining and interpreting the instruction manual for protein functions, individually and collectively, is the emerging challenge. Defining protein functions is a complex problem because each gene typically encodes several distinct proteins. As a result, the protein inventory includes as many as 100,000 distinct proteins. Protein functions can vary with developmental stage, anatomical location, and environmental context. Like the problem of sequencing the human genome, the multidimensional nature of protein functions in time, space and context constitutes one of the ''big'' problems in biomedical research. Resolving this problem is key to revolutionizing health care where a deep understanding of complex biological systems will lead to more powerful and specific ways to treat, and perhaps, even prevent birth defects and adult diseases. The meeting addressed the above issues.
Date:
October 1, 2004
Creator:
Aegean Conferences
Object Type:
Article
System:
The UNT Digital Library
Advanced Computational Model for Three-Phase Slurry Reactors Progress Report: October 2004
In this project, an Eulerian-Lagrangian formulation for analyzing three-phase slurry flows in a bubble column was developed. The approach used an Eulerian analysis of liquid flows in the bubble column, and made use of the Lagrangian trajectory analysis for the bubbles and particle motions. The bubble-bubble and particle-particle collisions are included the model. The model predictions are compared with the experimental data and good agreement was found An experimental setup for studying two-dimensional bubble columns was developed. The multiphase flow conditions in the bubble column were measured using optical image processing and Particle Image Velocimetry techniques (PIV). A simple shear flow device for bubble motion in a constant shear flow field was also developed. The flow conditions in simple shear flow device were studied using PIV method. Concentration and velocity of particles of different sizes near a wall in a duct flow was also measured. The technique of Phase-Doppler anemometry was used in these studies. An Eulerian volume of fluid (VOF) computational model for the flow condition in the two-dimensional bubble column was also developed. The liquid and bubble motions were analyzed and the results were compared with observed flow patterns in the experimental setup. Solid-fluid mixture flows in ducts …
Date:
October 1, 2004
Creator:
Ahmadi, Goodarz
Object Type:
Report
System:
The UNT Digital Library
Advanced Core Design And Fuel Management For Pebble-Bed Reactors
A method for designing and optimizing recirculating pebble-bed reactor cores is presented. At the heart of the method is a new reactor physics computer code, PEBBED, which accurately and efficiently computes the neutronic and material properties of the asymptotic (equilibrium) fuel cycle. This core state is shown to be unique for a given core geometry, power level, discharge burnup, and fuel circulation policy. Fuel circulation in the pebble-bed can be described in terms of a few well?defined parameters and expressed as a recirculation matrix. The implementation of a few heat?transfer relations suitable for high-temperature gas-cooled reactors allows for the rapid estimation of thermal properties critical for safe operation. Thus, modeling and design optimization of a given pebble-bed core can be performed quickly and efficiently via the manipulation of a limited number key parameters. Automation of the optimization process is achieved by manipulation of these parameters using a genetic algorithm. The end result is an economical, passively safe, proliferation-resistant nuclear power plant.
Date:
October 1, 2004
Creator:
Gougar, Hans D.; Ougouag, Abderrafi M. & Terry, William K.
Object Type:
Report
System:
The UNT Digital Library
Advanced Testing Techniques to Measure the PWSCC Resistance of Alloy 690 and its Weld Metals
Wrought Alloy 600 and its weld metals (Alloy 182 and Alloy 82) were originally used in pressurized water reactors (PWRs) due to the material's inherent resistance to general corrosion in a number of aggressive environments and because of a coefficient of thermal expansion that is very close to that of low alloy and carbon steel. Over the last thirty years, stress corrosion cracking in PWR primary water (PWSCC) has been observed in numerous Alloy 600 component items and associated welds, sometimes after relatively long incubation times. The occurrence of PWSCC has been responsible for significant downtime and replacement power costs. As part of an ongoing, comprehensive program involving utilities, reactor vendors and engineering/research organizations, this report will help to ensure that corrosion degradation of nickel-base alloys does not limit service life and that full benefit can be obtained from improved designs for both replacement components and new reactors.
Date:
October 1, 2004
Creator:
P.Andreson
Object Type:
Report
System:
The UNT Digital Library
Advances in Comprehensive Gyrokinetic Simulations of Transport in Tokamaks
A continuum global gyrokinetic code GYRO has been developed to comprehensively simulate core turbulent transport in actual experimental profiles and enable direct quantitative comparisons to the experimental transport flows. GYRO not only treats the now standard ion temperature gradient (ITG) mode turbulence, but also treats trapped and passing electrons with collisions and finite {beta}, equilibrium ExB shear stabilization, and all in real tokamak geometry. Most importantly the code operates at finite relative gyroradius ({rho}{sub *}) so as to treat the profile shear stabilization and nonlocal effects which can break gyroBohm scaling. The code operates in either a cyclic flux-tube limit (which allows only gyroBohm scaling) or globally with physical profile variation. Bohm scaling of DIII-D L-mode has been simulated with power flows matching experiment within error bars on the ion temperature gradient. Mechanisms for broken gyroBohm scaling, neoclassical ion flows embedded in turbulence, turbulent dynamos and profile corrugations, are illustrated.
Date:
October 1, 2004
Creator:
Waltz, R. E.; Candy, J.; Hinton, F. L.; Estrada-Mila, C. & Kinsey, J. E.
Object Type:
Article
System:
The UNT Digital Library
Advances in Comprehensive Gyrokinetic Simulations of Transport in Tokamaks
A continuum global gyrokinetic code GYRO has been developed to comprehensively simulate core turbulent transport in actual experimental profiles and enable direct quantitative comparisons to the experimental transport flows. GYRO not only treats the now standard ion temperature gradient (ITG) mode turbulence, but also treats trapped and passing electrons with collisions and finite {beta}, equilibrium ExB shear stabilization, and all in real tokamak geometry. Most importantly the code operates at finite relative gyroradius ({rho}{sub *}) so as to treat the profile shear stabilization and nonlocal effects which can break gyroBohm scaling. The code operates in either a cyclic flux-tube limit (which allows only gyroBohm scaling) or a globally with physical profile variation. Rohm scaling of DIII-D L-mode has been simulated with power flows matching experiment within error bars on the ion temperature gradient. Mechanisms for broken gyroBohm scaling, neoclassical ion flows embedded in turbulence, turbulent dynamos and profile corrugations, plasma pinches and impurity flow, and simulations at fixed flow rather than fixed gradient are illustrated and discussed.
Date:
October 1, 2004
Creator:
Waltz, R. E.; Candy, J.; Hinton, F. L.; Estrada-Mila, C. & Kinsey, J. E.
Object Type:
Article
System:
The UNT Digital Library
The Advocate, Volume 9, Issue 4, October-December 2004
Quarterly update providing information on environmental regulations for small businesses and local governments in Texas.
Date:
October 2004
Creator:
Texas Commission on Environmental Quality
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The Age, Volume 25, Number 10, October 2004
Monthly publication containing information related to Chambers County, Texas, including current events of the Chambers County Historical Commission, the Wallisville Heritage Park, and the Chambers County historical and genealogical societies; reprinted newspaper articles about county events and citizens; and historical news and records.
Date:
October 2004
Creator:
Wallisville Heritage Park (Organization)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
AGS Main Magnets Moved and BPM Survey Summer 2003
N/A
Date:
October 1, 2004
Creator:
C., Spataro; Ahrens, L.; Harvey, M.; Mroczkowski, T. & Karl, F.X.
Object Type:
Report
System:
The UNT Digital Library
Alaska Village Electric Load Calculator
As part of designing a village electric power system, the present and future electric loads must be defined, including both seasonal and daily usage patterns. However, in many cases, detailed electric load information is not readily available. NREL developed the Alaska Village Electric Load Calculator to help estimate the electricity requirements in a village given basic information about the types of facilities located within the community. The purpose of this report is to explain how the load calculator was developed and to provide instructions on its use so that organizations can then use this model to calculate expected electrical energy usage.
Date:
October 1, 2004
Creator:
Devine, M. & Baring-Gould, E. I.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 106, No. 157, Ed. 1 Friday, October 1, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
October 1, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Amistad: Recreational Oasis on the Border
Text for an article about Amistad Reservoir that was published in the October 2004 issue of Texas Highways magazine.
Date:
October 2004
Creator:
Mallory, Randy
Object Type:
Text
System:
The UNT Digital Library
[Amistad research]
Research about Del Rio and the Amistad Reservoir compiled for an article that was published in the October 2004 issue of Texas Highways magazine.
Date:
2004-10~
Creator:
Mallory, Randy
Object Type:
Text
System:
The UNT Digital Library
Analysis of multichannel internet communication.
A novel method employing machine-based learning to identify messages related to other messages is described and evaluated. This technique may enable an analyst to identify and correlate a small number of related messages from a large sample of individual messages. The classic machine learning techniques of decision trees and naive Bayes classification are seeded with few (or no) messages of interest and 'learn' to identify other related messages. The performance of this approach and these specific learning techniques are evaluated and generalized.
Date:
October 1, 2004
Creator:
Nove, Charles E.; Maclin, Richard Frank; Theuninck, Andrew K. (University of Minnesota-Duluth, Duluth, MN); Newland, Jeremy L. (University of Minnesota-Duluth, Duluth, MN); Torrey, Lisa A. (University of Wisconsin-Madison, Madison, WI) & Robinson, Eric R. (University of Wisconsin-Madison, Madison, WI)
Object Type:
Report
System:
The UNT Digital Library
Applications of the 3-D Deterministic Transport Code Attlla for Core Safety Analysis
An LDRD (Laboratory Directed Research and Development) project is ongoing at the Idaho National Engineering and Environmental Laboratory (INEEL) for applying the three-dimensional multi-group deterministic neutron transport code (Attila®) to criticality, flux and depletion calculations of the Advanced Test Reactor (ATR). This paper discusses the model development, capabilities of Attila, generation of the cross-section libraries, and comparisons to an ATR MCNP model and future.
Date:
October 1, 2004
Creator:
Lucas, D. S.
Object Type:
Article
System:
The UNT Digital Library
APS Neutrino Study: Report of the neutrino astrophysics and cosmology working group
In 2002, Ray Davis and Masatoshi Koshiba were awarded the Nobel Prize in Physics 'for pioneering contributions to astrophysics, in particular for the detection of cosmic neutrinos'. However, while astronomy has undergone a revolution in understanding by synthesizing data taken at many wavelengths, the universe has only barely been glimpsed in neutrinos, just the Sun and the nearby SN 1987A. An entire universe awaits, and since neutrinos can probe astrophysical objects at densities, energies, and distances that are otherwise inaccessible, the results are expected to be particularly exciting. Similarly, the revolution in quantitative cosmology has heightened the need for very precise tests that depend on the effects of neutrinos, and prominent among them is the search for the effects of neutrino mass, since neutrinos are a small but known component of the dark matter. In this report, we highlight some of the key opportunities for progress in neutrino astrophysics and cosmology, and the implications for other areas of physics.
Date:
October 2004
Creator:
Barwick, Steve W.; Beacom, John F.; Cianciolo, Vince; Dodelson, Scott; Feng, Jonathan L.; Fuller, George M. et al.
Object Type:
Article
System:
The UNT Digital Library
An Audit Report on Cash Controls at the University of Texas Health Science Center at Houston
Report of the Texas State Auditor's Office related to the University of Texas Health Science Center at Houston's (Health Science Center) controls for receiving, safeguarding, and disbursing cash, the accuracy of its accounting and record-keeping of collections and of state revenues, receipts, and disbursements, and its compliance with state laws and regulations related to cash management.
Date:
October 2004
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
An Audit Report on the Department of Transportation's Administration of Construction Contracts
Report of the Texas State Auditor's Office related to assessing controls over the Department of Transportation's payments on construction contracts, specifically regarding whether the Department effectively monitors and controls payments on construction projects, and whether Department management has the information necessary to support decision-making related to construction projects.
Date:
October 2004
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
Automated Diagnosis and Classification of Steam Generator Tube Defects
A major cause of failure in nuclear steam generators is tube degradation. Tube defects are divided into seven categories, one of which is intergranular attack/stress corrosion cracking (IGA/SCC). Defects of this type usually begin on the outer surface of the tubes and propagate both inward and laterally. In many cases these defects occur at or near the tube support plates. Several different methods exist for the nondestructive evaluation of nuclear steam generator tubes for defect characterization.
Date:
October 1, 2004
Creator:
Garcia, Gabe V.
Object Type:
Report
System:
The UNT Digital Library
B Quark Tagging and Cross-Section Measurement in Quark Pair Production at d0
None
Date:
October 1, 2004
Creator:
Greder, Sebastien & /Louis Pasteur U., Strasbourg I /Strasbourg, IReS
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library