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408 Matching Results
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385 - 408 of
408
A Numerical Analysis of the Single-Well Steam Assisted Gravity Drainage (SW-SAGD) Process, SUPRI TR-124
Results from this study include cumulative recoveries, temperature distributions, and production rates. It was found that cyclic steaming of the reservoir offers the most favorable option for heating the near-wellbore area to create conditions that improve initial SAGD response. More favorable reservoir conditions such as low viscosity, thick oil zones, and solution gas, improved reservoir response. Under unfavorable conditions, response was limited.
Date:
July 23, 2001
Creator:
Elliot, K. T. & Kovscek, A. R.
Object Type:
Report
System:
The UNT Digital Library
Parallelizing a High Accuracy Hardware-Assisted Volume Renderer for Meshes with Arbitrary Polyhedra
This paper discusses our efforts to improve the performance of the high-accuracy (HIAC) volume rendering system, based on cell projection, which is used to display unstructured, scientific data sets for analysis. The parallelization of HIAC, using the pthreads and MPI API's, resulted in significant speedup, but interactive frame rates are not yet attainable for very large data sets.
Date:
July 23, 2001
Creator:
Bennett,J; Cook,R; Max,N; May,D & Williams,P
Object Type:
Article
System:
The UNT Digital Library
PHASE II CALDERON PROCESS TO PRODUCE DIRECT REDUCED IRON RESEARCH AND DEVELOPMENT PROJECT
This project was initially targeted to the making of coke for blast furnaces by using proprietary technology of Calderon in a phased approach, and Phase I was completed. The project was then re-directed to the making of iron units. U.S. Steel teamed up with Calderon for a joint effort which will last 30 months to produce directly reduced iron with the potential of converting it into molten iron (hot metal) consistent with the Roadmap recommendations of 1998 prepared by the Steel Industry in cooperation with the Department of Energy. The work which is labeled as Phase II will take place at two levels; namely, the bench scale level and the process development unit level. During the past quarter approval for the re-direction took place and work was initiated at both levels.
Date:
July 23, 2001
Creator:
Calderon, Albert
Object Type:
Report
System:
The UNT Digital Library
The radiation environment in and near high gradient rf cavities.
The radiation environment in and near high gradient rf cavities is very important for the instrumentation of the MUCOOL experiment, since large fluxes of x rays and dark current electrons can interfere with the operation of the muon detectors. We have measured the x ray and dark current spectra from a single cell, 1.3 GHz, and are beginning to make more extensive measurements of a multicelled 805 MHz cavity. The results are consistent with electron field emission, bremsstrahlung and photon absorption/scattering. We discuss ways of minimizing this background and the scaling of these results to other cavities.
Date:
July 23, 2001
Creator:
Ducas, L.; Norem, J.; Geer, S.; Moretti, A.; Popovic, M. & Solomey, N.
Object Type:
Article
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 86, No. 267, Ed. 1 Monday, July 23, 2001
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 23, 2001
Creator:
Quinnelly, Lorrie J.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Simulating the Thermal History of the Unsaturated Zone at Yucca Mountain, Nevada
Heat transfer within Earth's upper crust is primarily by conduction, and conductive thermal models adequately explain the cooling history of deep, batholith-scale intrusions and surrounding wall rocks, as confirmed by numerous thermochronometric studies. However, caldera magmatic systems require consideration of the small and localized component of hydrothermal convection and numerical models to simulate additional boundary conditions, irregular magma chamber shapes, and complex intrusive histories. At Yucca Mountain, Nevada, the site of a potential high-level nuclear waste repository, simulating the detailed thermal history at any location in the unsaturated zone requires knowledge of the shape of the magma chamber and its proximity to Yucca Mountain (the southern margin of the Timber Mountain caldera complex is approximately 8 km north of the potential repository site), the temporal and spatial extent of hydrothermal convection, the erosional history of the area, and past levels of the water table.
Date:
July 23, 2001
Creator:
Marshal, B. D. & Whelan, J. F.
Object Type:
Report
System:
The UNT Digital Library
Spent Fuel Criticality Benchmark Experiments
Characteristics between commercial spent fuel waste packages (WP), Laboratory Critical Experiments (LCEs), and commercial reactor critical (CRC) evaluations are compared in this work. Emphasis is placed upon comparisons of CRC benchmark results and the relative neutron flux spectra in each system. Benchmark evaluations were performed for four different pressurized water reactors using four different sets of isotopes. As expected, as the number of fission products used to represent the burned fuel inventory approached reality, the closer to unity k{sub eff} became. Examination of material and geometry characteristics indicate several fundamental similarities between the WP and CRC systems. In addition, spectral evaluations were performed on a representative pressurized water reactor CRC, a 21-assembly area of the core modeled in a potential WP configuration, and three LCEs considered applicable benchmarks for storage packages. Fission and absorption reaction spectra as well as relative neutron flux spectra are generated and compared for each system. The energy dependent reaction rates are the product of the neutron flux spectrum and the energy dependent total macroscopic cross section. With constant source distribution functions, and the total macroscopic cross sections for the fuel region in the CRCs and WP being composed of nearly the same isotopics, the resulting …
Date:
July 23, 2001
Creator:
Scaglione, J.M.
Object Type:
Report
System:
The UNT Digital Library
Subsurface Contaminant Focus Area: Monitored Natural Attenuation (MNA)--Programmatic, Technical, and Regulatory Issues
Natural attenuation processes are commonly used for remediation of contaminated sites. A variety of natural processes occur without human intervention at all sites to varying rates and degrees of effectiveness to attenuate (decrease) the mass, toxicity, mobility, volume, or concentration of organic and inorganic contaminants in soil, groundwater, and surface water systems. The objective of this review is to identify potential technical investments to be incorporated in the Subsurface Contaminant Focus Area Strategic Plan for monitored natural attenuation. When implemented, the technical investments will help evaluate and implement monitored natural attenuation as a remediation option at DOE sites. The outcome of this review is a set of conclusions and general recommendations regarding research needs, programmatic guidance, and stakeholder issues pertaining to monitored natural attenuation for the DOE complex.
Date:
July 23, 2001
Creator:
Krupka, Kenneth M. & Martin, Wayne J.
Object Type:
Report
System:
The UNT Digital Library
Subsurface Contaminant Focus Area: Monitored Natural Attenuation (MNA)--Programmatic, Technical, and Regulatory Issues
Natural attenuation processes are commonly used for remediation of contaminated sites. A variety of natural processes occur without human intervention at all sites to varying rates and degrees of effectiveness to attenuate (decrease) the mass, toxicity, mobility, volume, or concentration of organic and inorganic contaminants in soil, groundwater, and surface water systems. The objective of this review is to identify potential technical investments to be incorporated in the Subsurface Contaminant Focus Area Strategic Plan for monitored natural attenuation. When implemented, the technical investments will help evaluate and implement monitored natural attenuation as a remediation option at DOE sites. The outcome of this review is a set of conclusions and general recommendations regarding research needs, programmatic guidance, and stakeholder issues pertaining to monitored natural attenuation for the DOE complex.
Date:
July 23, 2001
Creator:
Krupka, Kenneth M & Martin, Wayne J
Object Type:
Report
System:
The UNT Digital Library
Superlow-friction carbon films for fuel system components operating in low-sulfur diesel fuels.
None
Date:
July 23, 2001
Creator:
Erdemir, A.; Kavich, J.; Woodford, J.; Ajayi, L. & Fenske, G.
Object Type:
Article
System:
The UNT Digital Library
U.S. Infrastructure: Funding Trends and Federal Agencies' Investment Estimates
Testimony issued by the General Accounting Office with an abstract that begins "This testimony discusses the (1) federal government's role in ensuring a sound public infrastructure and (2) estimates of future investment requirements developed by seven federal agencies: the Appalachian Regional Commission, the Environmental Protection Agency, the Federal Aviation Administration, the Federal Highway Administration, the General Services Administration, and the U.S. Army Corps of Engineers. GAO found that the federal government exerts an important influence on infrastructure investment and development. The seven agencies GAO reviewed each estimate billions of dollars for future investment in infrastructure. The estimates focused on investment in the areas of water resources, hydropower, water supply, wastewater treatment, airports, highways, mass transit, and public buildings. Although these estimates encompass major areas of public infrastructure, they cannot be easily compared or simply "added up" to produce a national estimate of infrastructure investment needs. GAO did not independently verify the seven agencies' investment estimates, but it did rely on past reviews of these data by GAO and others that examined the soundness and completeness of the methodology and data used to develop the estimates. This testimony summarized the July 2001 report (GAO-01-835) and the February 2000 report (RCED/AIMD-00-35)."
Date:
July 23, 2001
Creator:
United States. General Accounting Office.
Object Type:
Text
System:
The UNT Digital Library
User's manual for RESRAD version 6.
This manual provides information on the design and application of the RESidual RADioactivity (RESRAD) code. It describes the basic models and parameters used in the RESRAD code to calculate doses and risks from residual radioactive materials and the procedures for applying these models to calculate operational guidelines for soil contamination. RESRAD has undergone many improvements to make it more realistic in terms of the models used in the code and the parameters used as defaults. Version 6 contains a total of 145 radionuclides (92 principal and 53 associated radionuclides), and the cutoff half-life for associated radionuclides has been reduced to 1 month. Other major improvements to the RESRAD code include its ability to run uncertainty analyses, additional options for graphical and text output, a better dose conversion factor editor, updated databases, a better groundwater transport model for long decay chains, an external ground radiation pathway model, an inhalation area factor model, time-integration of dose and risk, and a better graphical user interface. In addition, RESRAD has been benchmarked against other codes in the environmental assessment and site cleanup arena, and RESRAD models have been verified and validated.
Date:
July 23, 2001
Creator:
Yu, C.; Zielen, A. J.; Cheng, J. J.; LePoire, D. J.; Gnanapragasam, E.; Kamboj, S. et al.
Object Type:
Report
System:
The UNT Digital Library
Visualization of Solution Gas Drive in Viscous Oil, SUPRI TR-126
Several experimental studies of solution gas drive are available in this report. Almost all of the studies have used light oil. Solution gas drive behavior, especially in heavy oil reservoirs, is poorly understood. Experiments were performed in which pore-scale solution gas drive phenomena were viewed in water/carbon dioxide and viscous oil/carbon dioxide systems. A new pressure vessel was designed and constructed to house silicon-wafer micromodels that previously operated at low (<3 atm) pressure. The new apparatus is used for the visual studies. Several interesting phenomena were viewed. The repeated nucleation of gas bubbles was observed at a gas-wet site occupied by dirt. Interestingly, the dissolution of a gas bubble into the liquid phase was previously recorded at the same nucleation site. Gas bubbles in both systems grew to span one ore more pore bodies before mobilization. Liquid viscosity affected the ease with which gas bubbles coalesced. More viscous solutions result in slower rates of coalescence. The transport of solid particles on gas-liquid interfaces was also observed.
Date:
July 23, 2001
Creator:
George, D. S. & Kovscek, A. R.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 101, No. 114, Ed. 1 Sunday, July 23, 2000
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 23, 2000
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Alvin Sun-Advertiser (Alvin, Tex.), Vol. 109, No. 59, Ed. 1 Sunday, July 23, 2000
Weekly newspaper from Alvin, Texas that includes local, state, and national news along with advertising.
Date:
July 23, 2000
Creator:
Schwind, Jim & Holton, Kathleen
Object Type:
Newspaper
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 78, No. 240, Ed. 1 Sunday, July 23, 2000
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
July 23, 2000
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
An Evaluation of Condition Monitoring Techniques for Low-Voltage Electric Cables
Aging of systems and components in nuclear power plants is a well known occurrence that must be managed to ensure the continued safe operation of these plants. Much of the degradation due to aging is controlled through periodic maintenance and/or component replacement. However, there are components that do not receive periodic maintenance or monitoring once they are installed; electric cables are such a component. To provide a means of monitoring the condition of electric cables, research is ongoing to evaluate promising condition monitoring (CM) techniques that can be used in situ to monitor cable condition and predict remaining life. While several techniques are promising, each has limitations that must be considered in its application. This paper discusses the theory behind several of the promising cable CM techniques being studied, along with their effectiveness for monitoring aging degradation in typical cable insulation materials, such as cross-linked polyethylene and ethylene propylene rubber. Successes and limitations of each technique are also presented.
Date:
July 23, 2000
Creator:
Lofaro, Robert J.; Grove, Edward & Soo, Peter
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Sunday, July 23, 2000
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 23, 2000
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
OVERVIEW ON THE NRC-BNL BENCHMARK EVALUATION PROGRAM OF SEISMIC ANALYSIS METHODS FOR NON-CLASSICALLY DAMPED COUPLED SYSTEMS.
None
Date:
July 23, 2000
Creator:
Xu, J.
Object Type:
Article
System:
The UNT Digital Library
The Panola Watchman (Carthage, Tex.), Vol. 127, No. 59, Ed. 1 Sunday, July 23, 2000
Semiweekly newspaper from Carthage, Texas that includes local, state, and national news along with advertising.
Date:
July 23, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 118, No. 57, Ed. 1 Sunday, July 23, 2000
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
July 23, 2000
Creator:
White, Barbara
Object Type:
Newspaper
System:
The Portal to Texas History
Seminole Sentinel (Seminole, Tex.), Vol. 93, No. 80, Ed. 1 Sunday, July 23, 2000
Semiweekly newspaper from Seminole, Texas that includes local, state, and national news along with advertising.
Date:
July 23, 2000
Creator:
Dow, M. Gene & Fisher, David
Object Type:
Newspaper
System:
The Portal to Texas History
[Wheeler Avenue Baptist Church Bulletin: July 23, 2000]
Church bulletin listing the order of worship for the 7:30 and 11:00 Sunday morning services at the Wheeler Avenue Baptist Church, as well as various notes about upcoming events, congregational news, and other information of relevance to church members.
Date:
July 23, 2000
Creator:
Wheeler Avenue Baptist Church (Houston, Tex.)
Object Type:
Pamphlet
System:
The Portal to Texas History
Wireless handheld scanners integrated with waste tracking
The US Department of Energy (DOE) Idaho National Engineering and Environmental Laboratory (INEEL) has embraced mobile wireless technology to help the disposition of hazardous and mixed radiological waste. The following paper describes one application the INEEL developed to increase the data accuracy and near-real time reporting requirements for waste management. With the continuous operational demands at the ''site'', it was difficult to sustain an accurate, up-to-date database required for regulatory compliance audits and reporting. Incorporating wireless mobile technology, the INEEL was able to increase the accuracy while reducing the data delay times previously encountered. Installation issues prolonged the project along with obstacles encountered with operations personnel. However, the success of this project was found in persistence and management support as well as the technology itself. Future wireless, mobile computing will continue at the INEEL for years to come based on a successful project that was able to integrate new technology to an existing waste management system with proven, increased data accuracy.
Date:
July 23, 2000
Creator:
Anderson, R. S.
Object Type:
Article
System:
The UNT Digital Library