States

Advanced Lost Foam Casting Technology (open access)

Advanced Lost Foam Casting Technology

This report describes the research done under the six tasks to improve the process and make it more functional in an industrial environment. Task 1: Pattern Pyrolysis Products and Pattern Properties Task 2: Coating Quality Control Task 3: Fill and Solidification Code Task 4: Alternate Pattern Materials Task 5: Casting Distortion Task 6: Technology Transfer
Date: November 30, 2000
Creator: Bates, Charles E.; Littleton, Harry E.; Askeland, Don; Molibog, Taras; Hopper, Jason & Vatankhah, Ben
Object Type: Report
System: The UNT Digital Library
Alkaloid-derived molecules in low rank Argonne premium coals. (open access)

Alkaloid-derived molecules in low rank Argonne premium coals.

Molecules that are probably derived from alkaloids have been found in the extracts of the subbituminous and lignite Argonne Premium Coals. High resolution mass spectrometry (HRMS) and liquid chromatography mass spectrometry (LCMS) have been used to characterize pyridine and supercritical extracts. The supercritical extraction used an approach that has been successful for extracting alkaloids from natural products. The first indication that there might be these natural products in coals was the large number of molecules found containing multiple nitrogen and oxygen heteroatoms. These molecules are much less abundant in bituminous coals and absent in the higher rank coals.
Date: November 30, 2000
Creator: Winans, R. E.; Tomczyk, N. A. & Hunt, J. E.
Object Type: Article
System: The UNT Digital Library
Assessment of Reusing 14-ton, Thin-Wall, Depleted UF{sub 6} Cylinders as LLW Disposal Containers (open access)

Assessment of Reusing 14-ton, Thin-Wall, Depleted UF{sub 6} Cylinders as LLW Disposal Containers

Approximately 700,000 MT of DUF{sub 6} is stored, or will be produced under a current agreement with the USEC, at the Paducah site in Kentucky, Portsmouth site in Ohio, and ETTP site in Tennessee. On July 21, 1998, the 105th Congress approved Public Law 105-204 (Ref; 1), which directed that facilities be built at the Kentucky and Ohio sites to convert DUF{sub 6} to a stable form for disposition. On July 6, 1999, the Department of Energy (DOE) issued the ''Final Plan for the Conversion of Depleted Uranium Hexafluoride as Required by Public Law 105-204 (Ref. 2), in which DOE committed to develop a Depleted Uranium Hexafluoride Materials Use Roadmap''. On September 1, 2000, DOE issued the Draft Depleted Uranium Hexafluoride Materials Use Roadmap (Ref. 3) (Roadmap), which provides alternate paths for the long-term storage, beneficial use, and eventual disposition of each product form and material that will result from the DUF{sub 6} conversion activity. One of the paths being considered for DUF{sub 6} cylinders is to reuse the empty cylinders as containers to transport and dispose of LLW, including the converted DU. The Roadmap provides results of the many alternate uses and disposal paths for conversion products and the …
Date: November 30, 2000
Creator: O'Connor, D.G.
Object Type: Report
System: The UNT Digital Library
CAT Guide and Beamline Directory. A key to APS collaborative access teams. (open access)

CAT Guide and Beamline Directory. A key to APS collaborative access teams.

None
Date: November 30, 2000
Creator: unknown
Object Type: Report
System: The UNT Digital Library
CH2M Hill Hanford Group, Inc. Standards and Requirements Identification Document (SRID) Requirements Management System and Requirements Specification (open access)

CH2M Hill Hanford Group, Inc. Standards and Requirements Identification Document (SRID) Requirements Management System and Requirements Specification

The current Tank Farm Contractor (TFC) for the U. S. Department of Energy, Office of River Protection (ORP), River Protection Project (RPP), CH2M Hill Hanford Group, Inc. (CHG), will use a computer based requirements management system. The system will serve as a tool to assist in identifying, capturing, and maintaining the Standards/Requirements Identification Document (S/RID) requirements and links to implementing procedures and other documents. By managing requirements as one integrated set, CHG will be able to carry out its mission more efficiently and effectively. CHG has chosen the Dynamic Object Oriented Requirements System (DOORS{trademark}) as the preferred computer based requirements management system. Accordingly, the S/RID program will use DOORS{trademark}. DOORS{trademark} will replace the Environmental Requirements Management Interface (ERMI) system as the tool for S/RID data management. The DOORS{trademark} S/RID test project currently resides on the DOORSTM test server. The S/RID project will be migrated to the DOORS{trademark} production server. After the migration the S/RID project will be considered a production project and will no longer reside on the test server.
Date: November 30, 2000
Creator: Johnson, A. L.
Object Type: Report
System: The UNT Digital Library
Comparison of Advanced Distillation Control Methods, Final Technical Report (open access)

Comparison of Advanced Distillation Control Methods, Final Technical Report

Detailed dynamic simulations of three industrial distillation columns (a propylene/propane splitter, a xylene/toluene column, and a depropanizer) have been used to evaluate configuration selections for single-ended and dual-composition control, as well as to compare conventional and advanced control approaches. In addition, a simulator of a main fractionator was used to compare the control performance of conventional and advanced control. For each case considered, the controllers were tuned by using setpoint changes and tested using feed composition upsets. Proportional Integral (PI) control performance was used to evaluate the configuration selection problem. For single ended control, the energy balance configuration was found to yield the best performance. For dual composition control, nine configurations were considered. It was determined that the use of dynamic simulations is required in order to identify the optimum configuration from among the nine possible choices. The optimum configurations were used to evaluate the relative control performance of conventional PI controllers, MPC (Model Predictive Control), PMBC (Process Model-Based Control), and ANN (Artificial Neural Networks) control. It was determined that MPC works best when one product is much more important than the other, while PI was superior when both products were equally important. PMBC and ANN were not found to …
Date: November 30, 2000
Creator: Riggs, James B.
Object Type: Report
System: The UNT Digital Library
Comparison of AMOS computer code wakefield real part impedances with analytic results (open access)

Comparison of AMOS computer code wakefield real part impedances with analytic results

We have performed eleven AMOS (Azimuthal Mode Simulator)[1] code runs with a simple, right circular cylindrical accelerating cavity inserted into a circular, cylindrical, lossless beam pipe to calculate the real part of the n = 1(dipole) transverse wakefield impedance of this structure. We have compared this wakefield impedance in units of ohms/m(Wm) over the frequency range of 0-1 GHz to analytic predictions from Equation (2.3.8) of Briggs et al[2]. The results from Equation (2.3.8) were converted from the CGS units of statohms to the MKS units of ohms({Omega}) and then multiplied by (2{pi}f)/c = {Omega}/c = 2{pi}/{lambda}, where f is the frequency in Hz, c is the speed of light in vacuum in m/sec, {omega} is the angular frequency in radians/sec, and {lambda} is the wavelength in m. The dipole transverse wakefield impedance written to file from AMOS must be multiplied by c/o to convert it from units of {Omega}/m to units of {Omega}. The agreement between the AMOS runs and the analytic predictions are excellent for computational grids with square cells (dz = dr) and good for grids with rectangular cells (dz < dr). The quantity dz is the fixed-size axial grid spacing, and dr is the fixed-size radial …
Date: November 30, 2000
Creator: Mayhall, D J & Nelson, S D
Object Type: Report
System: The UNT Digital Library
Data Qualification Report: PRecipitation and Surface Geology Data for Use on the Yucca Mountain Project (open access)

Data Qualification Report: PRecipitation and Surface Geology Data for Use on the Yucca Mountain Project

The unqualified data addressed in this qualification report have been cited in an Analysis Model Report (AMR) to support the Site Recommendation in determining the suitability of Yucca Mountain as a repository for high-level radioactive waste. The unqualified data include precipitation volumes and surface geology maps The precipitation data consist of daily precipitation volumes measured at Yucca Mountain. The surface geology data include identification of the types and surface expressions of geologic units and associated structural features such as faults. These data were directly used in AMR U0010, Simulation of Net Infiltration for Modern and Potential Future Climates, ANL-NBS-HS-000032 (Hevesi et al. 2000), to estimate net infiltration into Yucca Mountain. This report evaluates the unqualified data within the context of supporting studies of this type for the Yucca Mountain Site Characterization Project (YMP). The purpose of this report is to identify data that can be cited as qualified for use in technical products to support the YMP Site Recommendation and that may also be used to support the License Application. The qualified data may either be retained in the original Data Tracking Number (DTN) or placed in new DTNs generated as a result of the evaluation. The appropriateness and limitations …
Date: November 30, 2000
Creator: Wilson, C.
Object Type: Report
System: The UNT Digital Library
A distributed application server for automatic differentiation. (open access)

A distributed application server for automatic differentiation.

The ADIC Application Server brings the accuracy and efficiency of automatic differentiation to the World Wide Web. Users of the ADIC Application Server can upload source code written in ANSI-C, manage remote files, differentiate selected functions, and download code augmented with derivative computations. Using a simple driver and linking to the appropriate libraries, the user can compile and run the differentiated code locally. We discuss the unique requirements for an automatic differentiation application server and describe the implementation of the ADIC Application Server.
Date: November 30, 2000
Creator: Norris, B. & Hovland, P. D.
Object Type: Article
System: The UNT Digital Library
Enhanced Geothermal Systems (EGS) R&D Program: US Geothermal Resources Review and Needs Assessment (open access)

Enhanced Geothermal Systems (EGS) R&D Program: US Geothermal Resources Review and Needs Assessment

The purpose of this report is to lay the groundwork for an emerging process to assess U.S. geothermal resources that might be suitable for development as Enhanced Geothermal Systems (EGS). Interviews of leading geothermists indicate that doing that will be intertwined with updating assessments of U.S. higher-quality hydrothermal resources and reviewing methods for discovering ''hidden'' hydrothermal and EGS resources. The report reviews the history and status of assessment of high-temperature geothermal resources in the United States. Hydrothermal, Enhanced, and Hot Dry Rock resources are addressed. Geopressured geothermal resources are not. There are three main uses of geothermal resource assessments: (1) They inform industry and other interest parties of reasonable estimates of the amounts and likely locations of known and prospective geothermal resources. This provides a basis for private-sector decisions whether or not to enter the geothermal energy business at all, and for where to look for useful resources. (2) They inform government agencies (Federal, State, local) of the same kinds of information. This can inform strategic decisions, such as whether to continue to invest in creating and stimulating a geothermal industry--e.g., through research or financial incentives. And it informs certain agencies, e.g., Department of Interior, about what kinds of tactical …
Date: November 30, 2000
Creator: Entingh, Dan & McLarty, Lynn
Object Type: Report
System: The UNT Digital Library
The experiment road to the heavier quarks and other heavy objects (open access)

The experiment road to the heavier quarks and other heavy objects

None
Date: November 30, 2000
Creator: Appel, Jeffrey A.
Object Type: Article
System: The UNT Digital Library
Fast track triggering for the CDF II Detector (open access)

Fast track triggering for the CDF II Detector

None
Date: November 30, 2000
Creator: Bloom, Kenneth
Object Type: Article
System: The UNT Digital Library
Final technical report: DE FG02-98ER45688 (open access)

Final technical report: DE FG02-98ER45688

Research using the Advanced Light Source Spectro-microscopy facility is described. Three closely related techniques, x-ray photoelectron spectroscopy, x-ray absorption spectroscopy, and x-ray fluorescence spectroscopy, have become widely accepted as important tools for the study of the chemical composition and electronic properties of surfaces, overlayers, and interfaces. There is now a major effort to push these spectroscopic techniques into a new realm of applications with very high spatial resolution, at and below 1 micron. This results in a new set of probes which can create images of chemical composition with great subtlety. The field is growing rapidly as high brightness sources of x-rays become available. This 6 month project was used to initiate research applications of soft x-ray spectro-microscopes at the Advanced Light Source. Due to its short duration, only preliminary results were obtained. The term ''spectromicroscopy'' is an ugly and unwieldy word to impose on an experimental endeavor, but it has been adopted by a number of disciplines and is likely to remain in use for some time. The word is obviously a contraction of the phrase ''spectroscopic microscopy,'' but there is also a distinction sometimes made between this, and the reverse combination, ''microscopic spectroscopy'', or ''microspectroscopy''. Microspectroscopy is a …
Date: November 30, 2000
Creator: Tonner, Brian P.
Object Type: Report
System: The UNT Digital Library
A Galerkin Implementation of the Generalized Helmholtz Decomposition for Vorticy Formulations (open access)

A Galerkin Implementation of the Generalized Helmholtz Decomposition for Vorticy Formulations

None
Date: November 30, 2000
Creator: INGBER,MARC STUART & KEMPKA,STEVEN N.
Object Type: Article
System: The UNT Digital Library
GAMMASPHERE+FMA : a journey beyond the proton drip-line. (open access)

GAMMASPHERE+FMA : a journey beyond the proton drip-line.

The majority of experiments performed during the 2-year long stay of GAMMAS-PHERE at the Argonne National Laboratory aimed to study proton-rich nuclei far from the line of stability at and beyond the proton drip-line. A high reaction channel selectivity was required to assign in-beam {gamma}-ray transitions to weakly populated exotic nuclei in the presence of background from strong reaction channels. In many of the experiments this was achieved by using the Argonne fragment mass analyzer to separate heavy-ion fusion-evaporation reaction products from scattered beam and disperse them according to their mass-over-charge-state ratio. For medium mass and heavy a and proton emitters the Recoil-Decay Tagging method was implemented. In-beam {gamma}-ray transitions were observed in several proton emitters between Z=50 and Z=82. Among others, rotational bands were assigned to {sup 141}Ho and {sup 131}Eu. A quadruple deformation of {beta}=0.25(4) was deduced for the ground state in {sup 141}Ho from the extracted dynamic moment of inertia. Based on observed band crossings and signature splittings the 7/2{sup {minus}} [523] and 1/2{sup +}[411] configurations were proposed for the ground state and the isomeric state, respectively. Comparison with particle-rotor calculations indicates, however, that {sup 141}Ho may have significant hexadecapole deformation and could be triaxial.
Date: November 30, 2000
Creator: Seweryniak, D.; Woods, P. J.; Ressler, J. J.; Davids, C. N.; Heinz, A.; Sonzogni, A. A. et al.
Object Type: Article
System: The UNT Digital Library
Geometric Reasoning in Generative Process Planning (open access)

Geometric Reasoning in Generative Process Planning

None
Date: November 30, 2000
Creator: Calton, T.L.
Object Type: Article
System: The UNT Digital Library
A grid-enabled MPI : message passing in heterogeneous distributed computing systems. (open access)

A grid-enabled MPI : message passing in heterogeneous distributed computing systems.

Application development for high-performance distributed computing systems, or computational grids as they are sometimes called, requires grid-enabled tools that hide mundate aspects of the heterogeneous grid environment without compromising performance. As part of an investigation of these issues, they have developed MPICH-G, a grid-enabled implementation of the Message Passing Interface (MPI) that allows a user to run MPI programs across multiple computers at different sites using the same commands that would be used on a parallel computer. This library extends the Argonne MPICH implementation of MPI to use services provided by the globus grid toolkit. In this paper, they describe the MPICH-G implementation and present preliminary performance results.
Date: November 30, 2000
Creator: Foster, I. & Karonis, N. T.
Object Type: Article
System: The UNT Digital Library
Improbability of Nuclear Criticality When Disposing of Transuranic Waste at the Waste Isolation Pilot Plant (open access)

Improbability of Nuclear Criticality When Disposing of Transuranic Waste at the Waste Isolation Pilot Plant

None
Date: November 30, 2000
Creator: Rechard, R.P.
Object Type: Article
System: The UNT Digital Library
The Observation of an Optimal Wire Number Range in Long Implosion Time Aluminum Z-Pinches (open access)

The Observation of an Optimal Wire Number Range in Long Implosion Time Aluminum Z-Pinches

None
Date: November 30, 2000
Creator: Coverdale, Christine A.; Deeney, Christopher; Douglas, Melissa R.; Apruzese, J. P.; Whitney, K. G.; Thornhill, J. W. et al.
Object Type: Article
System: The UNT Digital Library
Oxide film microstructure: the link between surface preparation processes and strength/durability of adhesively bonded aluminum. Final report (open access)

Oxide film microstructure: the link between surface preparation processes and strength/durability of adhesively bonded aluminum. Final report

Strength and durability of adhesive bonding of aluminum alloys structures are intrinsically determined by the surface microstructures and interfacial failure micromechanisms. The current project presents a multidisciplinary approach to addressing critical issues controlling the strength and durability of adhesive bonds of aluminum alloys. Three main thrust areas have been pursued: surface treatment technology development to achieve desirable surface microstructures; relationship between surface structure and properties of adhesive bonds; and failure mechanisms of adhesively bonded components.
Date: November 30, 2000
Creator: Hsia, K. Jimmy; Pearlstein, Arne J.; Scheeline, Alexander & Shang, Jian Ku
Object Type: Report
System: The UNT Digital Library
Saturated Plasma X-Ray Laser at 19 nm (open access)

Saturated Plasma X-Ray Laser at 19 nm

Saturated operation of a tabletop laser plasma X-ray laser at 19 nm is demonstrated with output energy of 2.5 {micro}J. The narrow beam divergence, high repetition rate, wavelength scalability, short pulse duration, high monochromaticity and high brightness make it a potential tool for X-ray laser applications, including seeding a future X-ray free electron laser.
Date: November 30, 2000
Creator: Li, Y.; Dunn, J.; Nilsen, J.; Osterheld, A.; Barbee, T. W., Jr. & Shlyaptsev, V. N.
Object Type: Article
System: The UNT Digital Library
Search for single top production with CDF (open access)

Search for single top production with CDF

None
Date: November 30, 2000
Creator: al., Pierre Savard et
Object Type: Article
System: The UNT Digital Library
Systems Engineering Implementation Plan for Single Shell Tanks (SST) Retrieval Projects (open access)

Systems Engineering Implementation Plan for Single Shell Tanks (SST) Retrieval Projects

This document communicates the planned implementation of the Systems Engineering processes and products for the SST retrieval projects as defined in the Systems Engineering Management Plan for the Tank Farm Contractor.
Date: November 30, 2000
Creator: LEONARD, M.W. & HOFFERBER, G.A.
Object Type: Report
System: The UNT Digital Library
Tanks Focus Area Alternative Salt Processing Research and Development Program Plan (open access)

Tanks Focus Area Alternative Salt Processing Research and Development Program Plan

In March 2000, DOE-Headquarters (HQ) requested the Tanks Focus Area (TFA) to assume management responsibility for the Salt Processing Project technology development program at Savannah River Site. The TFA was requested to conduct several activities, including review and revision of the technology development roadmaps, development of down-selection criteria, and preparation of a comprehensive Research and Development (R&D) Program Plan for three candidate cesium removal technologies, as well as the Alpha and strontium removal processes that must also be carried out. The three cesium removal candidate technologies are Crystalline Silicotitanate (CST) Non-Elutable Ion Exchange, Caustic Side Solvent Extraction (CSSX), and Small Tank Tetraphenylborate Precipitation (STTP). This plan describes the technology development needs for each process that must be satisfied in order to reach a down-selection decision, as well as continuing technology development required to support conceptual design activities.
Date: November 30, 2000
Creator: Harmon, Harry D.
Object Type: Report
System: The UNT Digital Library