States

Fundamental studies of fusion plasmas (open access)

Fundamental studies of fusion plasmas

Work on ICRF interaction with the edge plasma is reported. ICRF generated convective cells have been established as an important mechanism for influencing edge transport and interaction with the H-mode, and for controlling profiles in the tokamak scrape-off-layer. Power dissipation by rf sheaths has been shown to be significant for some misaligned ICRF and IIBW antenna systems. Near-field antenna sheath work has been extended to the far-field case, important for experiments with low single pass absorption. Impurity modeling and Faraday screen design support has been provided for the ICRF community. In the area of core-ICRF physics, the kinetic theory of heating by applied ICRF waves has been extended to retain important geometrical effects relevant to modeling minority heated tokamak plasmas, thereby improving on the physics base that is standard in presently employed codes. Both the quasilinear theory of ion heating, and the plasma response function important in wave codes have been addressed. In separate studies, it has been shown that highly anisotropic minority heated plasmas can give rise to unstable field fluctuations in some situations. A completely separate series of studies have contributed to the understanding of tokamak confinement physics. Additionally, a diffraction formalism has been produced which will be …
Date: April 27, 1993
Creator: Aamodt, R. E.; Catto, P. J.; D'Ippolito, D. A.; Myra, J. R. & Russell, D. A.
Object Type: Report
System: The UNT Digital Library
Fundamental studies of fusion plasmas. Annual performance report (open access)

Fundamental studies of fusion plasmas. Annual performance report

Work on ICRF interaction with the edge plasma is reported. ICRF generated convective cells have been established as an important mechanism for influencing edge transport and interaction with the H-mode, and for controlling profiles in the tokamak scrape-off-layer. Power dissipation by rf sheaths has been shown to be significant for some misaligned ICRF and IIBW antenna systems. Near-field antenna sheath work has been extended to the far-field case, important for experiments with low single pass absorption. Impurity modeling and Faraday screen design support has been provided for the ICRF community. In the area of core-ICRF physics, the kinetic theory of heating by applied ICRF waves has been extended to retain important geometrical effects relevant to modeling minority heated tokamak plasmas, thereby improving on the physics base that is standard in presently employed codes. Both the quasilinear theory of ion heating, and the plasma response function important in wave codes have been addressed. In separate studies, it has been shown that highly anisotropic minority heated plasmas can give rise to unstable field fluctuations in some situations. A completely separate series of studies have contributed to the understanding of tokamak confinement physics. Additionally, a diffraction formalism has been produced which will be …
Date: April 27, 1993
Creator: Aamodt, R. E.; Catto, P. J.; D`Ippolito, D. A.; Myra, J. R. & Russell, D. A.
Object Type: Report
System: The UNT Digital Library
[Michigan Technological University Pre-Service Teacher Enhancement Program]. Progress performance report (open access)

[Michigan Technological University Pre-Service Teacher Enhancement Program]. Progress performance report

The Michigan Technological University Teacher Education Program received funding from the US Department of Energy for the purpose of providing capable and suitably inclined, MTU Engineering and Science students a chance to explore high school level science and mathematics teaching as a career option. Ten undergraduate students were selected from nominations and were paired with mentor teachers for the study. This report covers the experience of the first ten nominees and their participation in the program.
Date: April 27, 1993
Creator: Anderson, C. S. & Yarroch, W. L.
Object Type: Report
System: The UNT Digital Library
[Michigan Technological University Pre-Service Teacher Enhancement Program]. [Includes a copy of the Student Guide] (open access)

[Michigan Technological University Pre-Service Teacher Enhancement Program]. [Includes a copy of the Student Guide]

The Michigan Technological University Teacher Education Program received funding from the US Department of Energy for the purpose of providing capable and suitably inclined, MTU Engineering and Science students a chance to explore high school level science and mathematics teaching as a career option. Ten undergraduate students were selected from nominations and were paired with mentor teachers for the study. This report covers the experience of the first ten nominees and their participation in the program.
Date: April 27, 1993
Creator: Anderson, C.S. & Yarroch, W.L.
Object Type: Report
System: The UNT Digital Library
Investigations on the Structure Tectonics, Geophysics, Geochemistry, and Hydrocarbon Potential of the Black Mesa Basin, Northeastern Arizona (open access)

Investigations on the Structure Tectonics, Geophysics, Geochemistry, and Hydrocarbon Potential of the Black Mesa Basin, Northeastern Arizona

The U.S. Department of Energy (DOE) has instituted a basin-analysis study program to encourage drilling in underexplored and unexplored areas and increase discovery rates for hydrocarbons by independent oil companies within the continental United States. The work is being performed at the DOE's National Institute for Petroleum and Energy Research (NIPER) in Bartlesville, Oklahoma, by the Exploration and Drilling Group within BDM-Oklahoma (BDM), the manager of the facility for DOE. Several low-activity areas in the Mid-Continent, west, and southwest were considered for the initial study area (Reeves and Carroll 1994a). The Black Mesa region in northwestern Arizona is shown on the U.S. Geological Survey 1995 oil and gas map of the United States as an undrilled area, adapted from Takahashi and Gautier 1995. This basin was selected by DOE s the site for the initial NIPER-BDM survey to develop prospects within the Lower-48 states (Reeves and Carroll 1994b).
Date: April 27, 1999
Creator: Barker, Colin; Carroll, Herbert; Erickson, Richard; George, Steve; Guo, Genliang; Reeves,T.K. et al.
Object Type: Report
System: The UNT Digital Library
Evaluation of the Validity of Groundwater Samples Obtained Using the Purge Water Management System at SRS (open access)

Evaluation of the Validity of Groundwater Samples Obtained Using the Purge Water Management System at SRS

As part of the demonstration testing of the Purge Water Management System (PWMS) technology at the Savannah River Site (SRS), four wells were equipped with PWMS units in 1997 and a series of sampling events were conducted at each during 1997-1998. Three of the wells were located in A/M Area while the fourth was located at the Old Radioactive Waste Burial Ground in the General Separations Area.The PWMS is a ''closed-loop'', non-contact, system used to collect and return purge water to the originating aquifer after a sampling event without having significantly altered the water quality. One of the primary concerns as to its applicability at SRS, and elsewhere, is whether the PWMS might resample groundwater that is returned to the aquifer during the previous sampling event. The purpose of the present investigation was to compare groundwater chemical analysis data collected at the four test wells using the PWMS vs. historical data collected using the standard monitoring program methodology to determine if the PWMS provides representative monitoring samples.The analysis of the groundwater chemical concentrations indicates that the PWMS sampling methodology acquired representative groundwater samples at monitoring wells ABP-1A, ABP-4, ARP-3 and BGO-33C. Representative groundwater samples are achieved if the PWMS does …
Date: April 27, 1999
Creator: Beardsley, C.C.
Object Type: Report
System: The UNT Digital Library
[Tampa Electric Integrated Gasification Combined Cycle Project]. Quarterly report, 1 January--31 March 1994 (open access)

[Tampa Electric Integrated Gasification Combined Cycle Project]. Quarterly report, 1 January--31 March 1994

This paper reports on the progress of a project to retrofit a Florida coal-fired power plant with a coal gasification combined cycle. Work has progressed on preliminary engineering, procurement, and a draft environmental impact statement. The paper discusses the resizing of the hot gas cleanup system, the modification of the schedule to eliminate the simple cycle commercialization and combine it with the combined cycle commercial operation, and the transport and installation of the radiant syngas cooler which is coming from Germany.
Date: April 27, 1994
Creator: Black, C. R.
Object Type: Report
System: The UNT Digital Library
Plan for Management of Mineral Assess on Native Tribal Lands and for Formation of a Fully Integrated Natural Gas and Oil Exploration and Production Company (open access)

Plan for Management of Mineral Assess on Native Tribal Lands and for Formation of a Fully Integrated Natural Gas and Oil Exploration and Production Company

This report describes a plan for Native American tribes to assume responsibility for and operation of tribal mineral resources using the Osage Tribe as an example. Under this plan, the tribal council select and employ a qualified Director to assume responsibility for management of their mineral reservations. The procurement process should begin with an application for contracting to the Bureau of Indian Affairs. Under this plan, the Director will develop strategies to increase income by money management and increasing exploitation of natural gas, oil, and other minerals.
Date: April 27, 1999
Creator: Blechner, Michael H.; Carroll, Herbert B. & Johnson, William I.
Object Type: Report
System: The UNT Digital Library
Magnetoresistance of One-Dimensional Subbands in Tunnel-Coupled Double Quantum Wires (open access)

Magnetoresistance of One-Dimensional Subbands in Tunnel-Coupled Double Quantum Wires

We study the low-temperature in-plane magnetoresistance of tunnel-coupled quasi-one-dimensional quantum wires. The wires are defined by two pairs of mutually aligned split gates on opposite sides of a < 1 micron thick AlGaAs/GaAs double quantum well heterostructure, allowing independent control of their widths. In the ballistic regime, when both wires are defined and the field is perpendicular to the current, a large resistance peak at ~6 Tesla is observed with a strong gate voltage dependence. The data is consistent with a counting model whereby the number of subbands crossing the Fermi level changes with field due to the formation of an anticrossing in each pair of 1D subbands.
Date: April 27, 1999
Creator: Blount, M. A.; Lyo, S. K.; Moon, J. S.; Reno, J. L.; Simmons, J. A. & Wendt, J. R.
Object Type: Article
System: The UNT Digital Library
Panama Canal capacity analysis (open access)

Panama Canal capacity analysis

Predicting the transit capacities of the various Panama Canal alternatives required analyzing data on present Canal operations, adapting and extending an existing computer simulation model, performing simulation runs for each of the alternatives, and using the simulation model outputs to develop capacity estimates. These activities are summarized in this paper. A more complete account may be found in the project final report (TAMS 1993). Some of the material in this paper also appeared in a previously published paper (Rosselli, Bronzini, and Weekly 1994).
Date: April 27, 1995
Creator: Bronzini, M.S.
Object Type: Article
System: The UNT Digital Library
Derivation of plutonium-239 materials disposition categories (open access)

Derivation of plutonium-239 materials disposition categories

At this time, the Office of Fissile Materials Disposition within the DOE, is assessing alternatives for the disposition of excess fissile materials. To facilitate the assessment, the Plutonium-Bearing Materials Feed Report for the DOE Fissile Materials Disposition Program Alternatives report was written. The development of the material categories and the derivation of the inventory quantities associated with those categories is documented in this report.
Date: April 27, 1995
Creator: Brough, W.G.
Object Type: Report
System: The UNT Digital Library
Three-dimensional gyrokinetic particle-in-cell simulation of plasmas on a massively parallel computer: Final report on LDRD Core Competency Project, FY 1991--FY 1993 (open access)

Three-dimensional gyrokinetic particle-in-cell simulation of plasmas on a massively parallel computer: Final report on LDRD Core Competency Project, FY 1991--FY 1993

One of the programs of the Magnetic fusion Energy (MFE) Theory and computations Program is studying the anomalous transport of thermal energy across the field lines in the core of a tokamak. We use the method of gyrokinetic particle-in-cell simulation in this study. For this LDRD project we employed massively parallel processing, new algorithms, and new algorithms, and new formal techniques to improve this research. Specifically, we sought to take steps toward: researching experimentally-relevant parameters in our simulations, learning parallel computing to have as a resource for our group, and achieving a 100 {times} speedup over our starting-point Cray2 simulation code`s performance.
Date: April 27, 1994
Creator: Byers, J. A.; Williams, T. J.; Cohen, B. I. & Dimits, A. M.
Object Type: Report
System: The UNT Digital Library
Native American Initiative Short Course Management Plan (open access)

Native American Initiative Short Course Management Plan

A training program is outlined for members of Native American tribes having an interest in working in the oil and gas industry. Also, the program will assist tribes whose lands have oil and gas resources to become more familiar with the industry and technology necessary to develop their resources. The proposed program will contribute to meeting the goals of the U.S. Department of Energy's (DOE) Domestic Oil and Gas Initiative to help Native American tribes become more self-sufficient in developing and managing their resources through training in cost-effective, improved technologies for hydrocarbon production that will meet environmental regulations. The training program outlined is for adult tribal representatives who are responsible for managing tribal mineral holdings or setting policy, or who work in the oil and gas industry. The course content is in response to a survey that was developed by BDM-Oklahoma and sent in the spring of 1995 to 26 tribes or tribal agencies which were identified through previous contact with DOE. Tribes were asked to indicate course content needs, levels, preferred time of year, and location. Six tribes responded with specific recommendations and needs. These tribes include the Osage, Creek, Pueblo, Cherokee, St. Regis Mohawk, Northern Arapaho, and Ute …
Date: April 27, 1999
Creator: Carroll, H.B.
Object Type: Report
System: The UNT Digital Library
Mineral Resource Information System for Field Lab in the Osage Mineral Reservation Estate (open access)

Mineral Resource Information System for Field Lab in the Osage Mineral Reservation Estate

The Osage Mineral Reservation Estate is located in Osage County, Oklahoma. Minerals on the Estate are owned by members of the Osage Tribe who are shareholders in the Estate. The Estate is administered by the Osage Agency, Branch of Minerals, operated by the U.S. Bureau of Indian Affairs (BIA). Oil, natural gas, casinghead gas, and other minerals (sand, gravel, limestone, and dolomite) are exploited by lessors. Operators may obtain from the Branch of Minerals and the Osage Mineral Estate Tribal Council leases to explore and exploit oil, gas, oil and gas, and other minerals on the Estate. Operators pay a royalty on all minerals exploited and sold from the Estate. A mineral Resource Information system was developed for this project to evaluate the remaining hydrocarbon resources located on the Estate. Databases on Microsoft Excel spreadsheets of operators, leases, and production were designed for use in conjunction with an evaluation spreadsheet for estimating the remaining hydrocarbons on the Estate.
Date: April 27, 1999
Creator: Carroll, H.B. & Johnson, William I.
Object Type: Report
System: The UNT Digital Library
Field Laboratory in the Osage Reservation -- Determination of Status of Oil and Gas Operations (open access)

Field Laboratory in the Osage Reservation -- Determination of Status of Oil and Gas Operations

Microsoft EXCEL and Lotus 1-2-3 spreadsheets have been programmed to perform calculations as reservoir data is entered. These program were developed by BDM-Oklahoma, Inc. personnel for use in the Field Laboratory in the Osage Reservation project. This spreadsheet will also assist Native American Tribe members in evaluation of the petroleum resource on the Osage Mineral Estate, Osage County, Oklahoma and independent operators to evaluate petroleum reservoirs on and off of the Osage Mineral Estate.
Date: April 27, 1999
Creator: Carroll, Herb & Johnson, W.I.
Object Type: Report
System: The UNT Digital Library
Federal Environmental Regulations Impacting Hydrocarbon Exploration, Drilling, and Production Operations (open access)

Federal Environmental Regulations Impacting Hydrocarbon Exploration, Drilling, and Production Operations

Waste handling and disposal from hydrocarbon exploration, drilling, and production are regulated by the US Environmental Protection Agency (EPA) through federal and state regulations and/or through implementation of federal regulations. Some wastes generated in these operations are exempt under the Resource Conservation and Recovery Act (RCRA) but are not exempt under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), Superfund Amendments and Reauthorization Act (SARA), and other federal environmental laws. Exempt wastes remain exempt only if they are not mixed with hazardous wastes or hazardous substances. Once mixture occurs, the waste must be disposed as a hazardous material in an approved hazardous waste disposal facility. Before the Clean Air Act as amended in 1990, air emissions from production, storage, steam generation, and compression facilities associated with hydrocarbon exploration, drilling, and production industry were not regulated. A critical proposed regulatory change which will significantly effect Class II injection wells for disposal of produced brine and injection for enhanced oil recovery is imminent. Federal regulations affecting hydrocarbon exploration, drilling and production, proposed EPA regulatory changes, and a recent significant US Court of Appeals decision are covered in this report. It appears that this industry will, in the future, fall under more …
Date: April 27, 1999
Creator: Carroll, Herbert B. & Johnson, William I.
Object Type: Report
System: The UNT Digital Library
Field Laboratory in the Osage Reservation -- Determination of the Status of Oil and Gas Operations: Task 1. Development of Survey Procedures and Protocols (open access)

Field Laboratory in the Osage Reservation -- Determination of the Status of Oil and Gas Operations: Task 1. Development of Survey Procedures and Protocols

Procedures and protocols were developed for the determination of the status of oil, gas, and other mineral operations on the Osage Mineral Reservation Estate. The strategy for surveying Osage County, Oklahoma, was developed and then tested in the field. Two Osage Tribal Council members and two Native American college students (who are members of the Osage Tribe) were trained in the field as a test of the procedures and protocols developed in Task 1. Active and inactive surface mining operations, industrial sites, and hydrocarbon-producing fields were located on maps of the county, which was divided into four more or less equal areas for future investigation. Field testing of the procedures, protocols, and training was successful. No significant damage was found at petroleum production operations in a relatively new production operation and in a mature waterflood operation.
Date: April 27, 1999
Creator: Carroll, Herbert B. & Johnson, William I.
Object Type: Report
System: The UNT Digital Library
Geologic Analysis of Priority Basins for Exploration and Drilling (open access)

Geologic Analysis of Priority Basins for Exploration and Drilling

There has been a substantial decline in both exploratory drilling and seismic field crew activity in the United States over the last 10 years, due primarily to the declining price of oil. To reverse this trend and to preserve the entrepreneurial independent operator, the U.S. DOE is attempting to encourage hydrocarbon exploration activities in some of the under exploited regions of the United States. This goal is being accomplished by conducting broad regional reviews of potentially prospective areas within the lower 48 states. Data are being collected on selected areas, and studies are being done on a regional scale generally unavailable to the smaller independent. The results of this work will be made available to the public to encourage the undertaking of operations in areas which have been overlooked until this project. Fifteen criteria have been developed for the selection of study areas. Eight regions have been identified where regional geologic analysis will be performed. This report discusses preliminary findings concerning the geology, early tectonic history, structure and potential unconventional source rocks for the Black Mesa basin and South Central states region, the two highest priority study areas.
Date: April 27, 1999
Creator: Carroll, Herbert B. & Reeves, T. K.
Object Type: Report
System: The UNT Digital Library
Exploration 3-D Seismic Field Test/Native Tribes Initiative (open access)

Exploration 3-D Seismic Field Test/Native Tribes Initiative

To determine current acquisition procedures and costs and to further the goals of the President's Initiative for Native Tribes, a seismic-survey project is to be conducted on Osage tribal lands. The goals of the program are to demonstrate the capabilities, costs, and effectiveness of 3-D seismic work in a small-operator setting and to determine the economics of such a survey. For these purposes, typical small-scale independent-operator practices are being followed and a shallow target chose in an area with a high concentration of independent operators. The results will be analyzed in detail to determine if there are improvements and/or innovations which can be easily introduced in field-acquisition procedures, in processing, or in data manipulation and interpretation to further reduce operating costs and to make the system still more active to the small-scale operator.
Date: April 27, 1999
Creator: Carroll, Herbert B.; Chen, K. C.; Guo, Genliang; Johnson, W. I.; Reeves, T. K., Jr. & Sharma, Bijon
Object Type: Report
System: The UNT Digital Library
94-A13 Native American Initiative Short Course Management Plan (open access)

94-A13 Native American Initiative Short Course Management Plan

A training program conducted in Bartlesville by BDM-Oklahoma technical staff, which included geologists, geophysicists, exploration and drilling specialists, and environmental policy experts. The proposed training schedule offered four courses per year and included those coursed identified by the tribes in the survey. The training program was outlined for members of Native American Tribes whose lands have oil and gas resources. The proposed program contributed to meeting the goals of the U.S. Department of Energy's (DOE) Domestic Oil and Gas Initiative to help Native American tribes become more self-sufficient in developing and managing their resources through training in cost-effective, improved technologies for hydrocarbon production that will meet environmental regulations. The training program outlined was for adult tribal representatives who are responsible for managing tribal mineral holdings or setting policy, or who work in the oil and gas industry. The course content is in response to a survey that was developed by BDM-Oklahoma and sent in the Spring of 1995 to 26 tribal agencies identified through previous contact with DOE. Tribes were asked to indicate course content needs, levels, preferred time of year, and location. Six tribes responded with specific recommendations and needs. These tribes, were the Creek, Pueblo, Cherokee, St. Regis …
Date: April 27, 1999
Creator: Carroll, Herbert B.; Johnson, William I. & Kokesh, Judith H.
Object Type: Report
System: The UNT Digital Library
Fuel property effects on engine combustion processes. Final report (open access)

Fuel property effects on engine combustion processes. Final report

A major obstacle to improving spark ignition engine efficiency is the limitations on compression ratio imposed by tendency of hydrocarbon fuels to knock (autoignite). A research program investigated the knock problem in spark ignition engines. Objective was to understand low and intermediate temperature chemistry of combustion processes relevant to autoignition and knock and to determine fuel property effects. Experiments were conducted in an optically and physically accessible research engine, static reactor, and an atmospheric pressure flow reactor (APFR). Chemical kinetic models were developed for prediction of species evolution and autoignition behavior. The work provided insight into low and intermediate temperature chemistry prior to autoignition of n-butane, iso-butane, n-pentane, 1-pentene, n-heptane, iso-octane and some binary blends. Study of effects of ethers (MTBE, ETBE, TAME and DIPE ) and alcohols (methanol and ethanol) on the oxidation and autoignition of primary reference fuel (PRF) blends.
Date: April 27, 1995
Creator: Cernansky, N.P. & Miller, D.L.
Object Type: Report
System: The UNT Digital Library
WhiteCap System, structural analysis reports. Progress report, April 1995--June 1995 (open access)

WhiteCap System, structural analysis reports. Progress report, April 1995--June 1995

The authors have completed an engineering investigation of the CoolRoof System as applicable to typical building construction in the Sacramento Valley. The purpose of this investigation is to provide structural engineering recommendations regarding structural modifications to typical building construction required by CoolRoof. This report presents the results of our investigation.
Date: April 27, 1995
Creator: Chai, Y. H. & Romstad, K. M.
Object Type: Report
System: The UNT Digital Library
Design considerations and performance of a scalable version of a nonhydrostatic atmospheric model (open access)

Design considerations and performance of a scalable version of a nonhydrostatic atmospheric model

The Naval Research Laboratory's Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS) is being developed into a parallel, scalable model in a joint collaborative effort with Lawrence Livermore National Laboratory. The initial focus is on the atmospheric forecast model, which solves a coupled, three-dimensional set of dynamical equations using finite differences. A distributed/shared memory parallel programming paradigm is used. Distributed memory parallelism is achieved through a two-dimensional domain decomposition technique, with internodal communication accomplished using Message Passing Interface (MPI), and OpenMP is used to provide parallelism within a node. Initial performance results on both the IBM-SP and Cray-T3E are presented.
Date: April 27, 1999
Creator: Chen, S.; Hodur, R. M.; Mirin, A. A.; Schmidt, J. M. & Sugiyama, G.
Object Type: Article
System: The UNT Digital Library
Calculation of DWPF Canister Decay Heat for Sludge Macro-Batches 1B to 9 (open access)

Calculation of DWPF Canister Decay Heat for Sludge Macro-Batches 1B to 9

The rates of heat generation of DWPF glass canisters due to radioactive decay have been estimated for the remaining nine macro-batches of sludge feed. The estimated decay heat ranged from 177.5 Watts for each Macro-batch 1B canister to 498.4 Watts for each Macro-batch 8 canister. These projections are based on the HLW radionuclide inventory data available as of 4/1/98, and do not reflect further decay since then. It was assumed that each DWPF glass canister would also contain a nominal quantity of salt waste based on the reference coupled feed flowsheet. Issue of this report successfully closes a recent technical assistance request (HLW/DWPF-TAR-990003).
Date: April 27, 1999
Creator: Choi, A. S.
Object Type: Report
System: The UNT Digital Library