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A Numerical Feasibility Study of Three-Component Induction Logging for Three Dimensional Imaging About a Single Borehole
A theoretical analysis has been completed for a proposed induction logging tool designed to yield data which are used to generate three dimensional images of the region surrounding a well bore. The proposed tool consists of three mutually orthogonal magnetic dipole sources and multiple 3 component magnetic field receivers offset at different distances from the source. The initial study employs sensitivity functions which are derived by applying the Born Approximation to the integral equation that governs the magnetic fields generated by a magnetic dipole source located within an inhomogeneous medium. The analysis has shown that the standard coaxial configuration, where the magnetic moments of both the source and the receiver are aligned with the axis of the well bore, offers the greatest depth of sensitivity away from the borehole compared to any other source-receiver combination. In addition this configuration offers the best signal-to-noise characteristics. Due to the cylindrically symmetric nature of the tool sensitivity about the borehole, the data generated by this configuration can only be interpreted in terms of a two-dimensional cylindrical model. For a fill 3D interpretation the two radial components of the magnetic field that are orthogonal to each other must be measured. Coil configurations where both …
Date:
August 1, 1999
Creator:
ALUMBAUGH, DAVID L. & WILT, MICHAEL J.
Object Type:
Report
System:
The UNT Digital Library
Approaches to large scale unsaturated flow in heterogeneous, stratified, and fractured geologic media
This report develops a broad review and assessment of quantitative modeling approaches and data requirements for large-scale subsurface flow in radioactive waste geologic repository. The data review includes discussions of controlled field experiments, existing contamination sites, and site-specific hydrogeologic conditions at Yucca Mountain. Local-scale constitutive models for the unsaturated hydrodynamic properties of geologic media are analyzed, with particular emphasis on the effect of structural characteristics of the medium. The report further reviews and analyzes large-scale hydrogeologic spatial variability from aquifer data, unsaturated soil data, and fracture network data gathered from the literature. Finally, various modeling strategies toward large-scale flow simulations are assessed, including direct high-resolution simulation, and coarse-scale simulation based on auxiliary hydrodynamic models such as single equivalent continuum and dual-porosity continuum. The roles of anisotropy, fracturing, and broad-band spatial variability are emphasized. 252 refs.
Date:
August 1, 1991
Creator:
Ababou, R.
Object Type:
Report
System:
The UNT Digital Library
Results from a search for a neutral Scalar produced in association with a W boson in p pbar collisions at squareroot s = 1.8 TeV
This paper presents a search for production of a hypothetical heavy particle {ital X} in association with a {ital W} boson. For the search presented here, the kinematics and acceptance are modelled under the assumption that the {ital X} particle has the spin and decay properties of the standard model Higgs boson with the modification that only {ital X} {r_arrow} {ital b}{ital {anti b}} decays are allowed. The {ital W} is required to decay via either the electron or muon mode. The complete D{null} 1992-1995 data set is used. This sample has an integrated luminosity of 100 pb{sup -1} and was taken at a center of mass energy of 1.8 TeV. Limits are placed on the number of associated production events and the production cross section.
Date:
August 1, 1996
Creator:
Abachi, S.
Object Type:
Article
System:
The UNT Digital Library
Search for b {yields} X {mu} {sup +} {mu} {sup -} and B {sup 0} {yields} {mu} {sup +} {mu} {sup -} decays in p {anti p} Collisions at {radical} s= 1.8 TeV
We have searched for the flavor-changing neutral current decays b {yields} X{mu}{sup +}{mu}{sup -} and B{sup 0} {yields} {mu}{sup +}{mu}{sup -} in p{anti p} collisions at {radical}s = 1.8 TeV with the D0 detector at Fermilab. Using our observed {mu}{sup +}{mu}{sup - } mass spectrum and the measured b production cross section we determine the 90% confidence limit for the branching fraction B(b {yields} s{mu}{sup +}{mu}{sup -}) < 3.6{times}10{sup -5}. For the exclusive, purely leptonic decay B{sup 0} {yields} {mu}{sup +}{mu}{sup -} we obtain a 90% confidence level limit B(B{sup 0} {yields} {mu}{sup +}{mu}{sup -}) < 8.0{times}10{sup -6}. 9 refs., 3 figs.
Date:
August 1, 1996
Creator:
Abachi, S.
Object Type:
Report
System:
The UNT Digital Library
Small angle muon and b-quark production in p pbar collisions at squareroot s = 1.8 TeV
We report on a measurement of small angle muon production (2.4 < {vert_bar}{ital y}{sup {mu}}{vert_bar} < 3.2) in {ital p}{ital {anti p}} collisions at {radical}s = 1.8 TeV with the D{null} detector at Fermilab. We have determined the fraction of the inclusive {mu} cross section in this region due to {ital b}-quark production and decay. Combining this measurement with our previously measured cross section in the central region, we calculate {ital d}{sigma}/{ital dy} for muons from {ital b} decay with {ital p}{sup {mu}}{sub T} > 5 GeV/c and {ital p}{sup {mu}}{sub T} > 8 GeV/c. These measurements are compared to next-to-leading order QCD calculations.
Date:
August 1, 1996
Creator:
Abachi, S.
Object Type:
Article
System:
The UNT Digital Library
Tests of QCD in W and Z production at Tevatron
We present measurements of the production cross sections times leptonic branching fractions and the transverse momentum distributions of W and Z bosons in p{bar p} collisions at {radical}s = 1.8 TeV using data collected with the DO detector at the Fermilab Tevatron p{bar p} collider. A preliminary measurement of the W charge asymmetry is also presented.
Date:
August 1, 1995
Creator:
Abachi, S.
Object Type:
Article
System:
The UNT Digital Library
Hard single diffractive jet production at D0
Preliminary results from the D{null} experiment on jet production with forward rapidity gaps in {ital p{anti p}} collisions are presented. A class of dijet events with a forward rapidity gap is observed at center-of-mass energies {radical}s = 1800 GeV and 630 GeV. The number of events with rapidity gaps at both center-of-mass energies is significantly greater than the expectation from multiplicity fluctuations and is consistent with a hard single diffractive process. A small class of events with two forward gaps and central dijets is also observed at 1800 GeV. This topology is consistent with hard double pomeron exchange.
Date:
August 1, 1996
Creator:
Abachi, S.; Abbott, B. & Abolins, M.
Object Type:
Article
System:
The UNT Digital Library
Color coherent radiation in multijet events from p{bar p} collisions at {radical}s = 1.8 TeV
We report on a study of color coherence effects in p{bar p} collisions based on data collected by the D0 detector during the 1992-1993 run of the Fermilab Tevatron collider at the center of mass energy {radical}s = 1.8 TeV. We demonstrate initial-to-final state color interference effects by measuring spatial correlations between soft and hard jets in multijet events. The data are compared to Monte Carlo simulations with different color coherence implementations and to the predictions of a NLO parton level calculation.
Date:
August 1, 1995
Creator:
Abachi, S.; Ahn, S. & Baldin, B.
Object Type:
Article
System:
The UNT Digital Library
Stabilization and/or regeneration of spent sorbents from coal gasification. [Quarterly] technical report, December 1, 1991--February 29, 1992
The objective of this investigation is to determine the effects of SO, partial pressure and reaction temperature on the conversion of sulfide containing solid wastes from coal gasifiers to stable and environmentally acceptable calcium-sulfate, while preventing the release of sulfur dioxide through undesirable side reactions during the stabilization step. An additional objective of this program is to investigate the use of the Spent Sorbent Regeneration Process (SSRP) to regenerate spent limestone, from a fluidized-bed gasifier with in-bed sulfur capture, for recycling to the gasifier. To achieve these objectives, selected samples of partially sulfided sorbents will be reacted with oxygen at a variety of operating conditions under sufficient S0{sub 2} partial pressure to prevent release of sulfur from the solids during stabilization that reduces the overall sorbent utilization. Partially sulfided limestone will also be regenerated with water to produce calcium hydroxide and release sulfur as H{sub 2}S. The regenerated sorbent will be dewatered, dried and pelletized. The reactivity of the regenerated sorbent toward H{sub 2}S will also be determined.
Date:
August 1, 1992
Creator:
Abbasian, J.; Hill, A. H. & Wangerow, J. R.
Object Type:
Report
System:
The UNT Digital Library
Development of novel copper-based sorbents for hot-gas cleanup. [Quarterly] technical report, December 1, 1991--February 29, 1992
The objective of this investigation is to evaluate several novel copper-based binary oxides for their suitability as regenerable sorbents for hot gas cleanup application in the temperature range of 650{degrees} to 850{degrees}C. To achieve this objective, several novel copper-based binary oxide sorbents will be prepared. Experimental tests will be conducted at ambient pressure to determine the stability, sulfidation capacity, regenerability, and sulfidation kinetics of the novel sorbents. Tests will also be conducted at high pressure for the determination of the sulfidation reactivity, regenerability, and durability of the sorbents. The attrition characteristics of the sorbents will also be determined.
Date:
August 1, 1992
Creator:
Abbasian, J.; Hill, A. H.; Wangerow, J. R.; Flytzani-Stephanopoulos, M.; Bo, L. & Patel, C.
Object Type:
Report
System:
The UNT Digital Library
Optimal choice of cupola furnace nominal operating point
One of the main goals in the operation of a cupola furnace is to keep the molten iron properties within prescribed bounds while maintaining the most economical operation for the cupola. In this paper the authors present a procedure to obtain the nominal values for the manipulated process variables. The nominal values are calculated by solving a constrained nonlinear programming optimization problem. Two different optimization problems are discussed and examples for using the procedure are presented.
Date:
August 1, 1998
Creator:
Abdelrahman, M.A. & Moore, K.L.
Object Type:
Article
System:
The UNT Digital Library
Analytical steam injection model for layered systems
Screening, evaluation and optimization of the steam flooding process in homogeneous reservoirs can be performed by using simple analytical predictive models. In the absence of any analytical model for layered reservoirs, at present, only numerical simulators can be used. And these are expensive. In this study, an analytical model has been developed considering two isolated layers of differing permeabilities. The principle of equal flow potential is applied across the two layers. Gajdica`s (1990) single layer linear steam drive model is extended for the layered system. The formulation accounts for variation of heat loss area in the higher permeability layer, and the development of a hot liquid zone in the lower permeability layer. These calculations also account for effects of viscosity, density, fractional flow curves and pressure drops in the hot liquid zone. Steam injection rate variations in the layers are represented by time weighted average rates. For steam zone calculations, Yortsos and Gavalas`s (1981) upper bound method is used with a correction factor. The results of the model are compared with a numerical simulator. Comparable oil and water flow rates, and breakthrough times were achieved for 100 cp oil. Results with 10 cp and 1000 cp oils indicate the need …
Date:
August 1, 1993
Creator:
Abdual-Razzaq; Brigham, W. E. & Castanier, L. M.
Object Type:
Report
System:
The UNT Digital Library
Progress and commissioning of the SLD Cherenkov Ring Imaging Detector
We report the recent progress of the SLD Cherenkov Ring Imaging Detector. All of the individual components of the device (TPCs, mirrors, liquid radiator trays) have been completed and installed. Almost half of the electronics packages are installed and operational, and the data acquisition system has been commissioned. The liquid C{sub 6}F{sub 14} recirculation system is functioning. The drift gas supply systems are operating well with TMAE, and the gaseous freon C{sub 5}F{sub 12} recirculator is being brought on-line. Our monitor and control systems are fully functional. The commissioning of all 40 TPCs at full operating voltage has gone very smoothly. The system shows a remarkable immunity to the SLC backgrounds, and yields very clean events, while operating with a single electron sensitivity. 9 refs., 2 figs.
Date:
August 1, 1991
Creator:
Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H. (Tohoku Univ., Sendai (Japan). Dept. of Physics); Antilogus, P.; Aston, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Energy conservation opportunities in small commercial buildings
As part of a joint project between Duke Power Co. and Oak Ridge National Laboratory (ORNL), a study was performed to determine the energy savings potential of small commercial buildings, located in the Duke Power service territory. This relatively untouched portion of the commercial sector has the potential for reducing energy consumption by 13% - 25%, which corresponds to a reduction in average annual operating costs of $500 - $1000 per building. A database of over sixty customers was used to target five buildings with unusually high levels of energy consumption and/or peak demand. Conservation measures in these buildings were selected on the basis of cost-effectiveness and relative non-intrusiveness on the occupants. Together, ORNL and Duke Power representatives worked on data analysis, site-audits, and measure recommendations. Duke Power supplied hourly and monthly utility data, customer survey information and participated in site-audits. ORNL analyzed the data, developed targeting indices, performed site-audits and corresponding first-order energy simulations on candidate buildings, and recommended individualized conservation retrofits. For the five buildings examined, retrofits including lighting, controls, and HVAC systems accounted for a total reduction in consumption of 32%, and in peak demand of 22%. In addition, the study emphasizes the importance of continuous attention …
Date:
August 1, 1995
Creator:
Abraham, M. M. & MacDonald, J. M.
Object Type:
Report
System:
The UNT Digital Library
Preliminary analysis of the ORNL Liquid Low-Level Waste system
The objective of this report is to summarize the status of the Liquid Low-Level Waste (LLLW) Systems Analysis project. The focus of this project has been to collect and tabulate data concerning the LLLW system, analyze the current LLLW system operation, and develop the information necessary for the development of long-term treatment options for the LLLW generated at ORNL. The data used in this report were collected through a survey of Oak Ridge National Laboratory (ORNL) literature, various letter reports, and a survey of all current LLLW generators. These data are also being compiled in a user friendly database for ORNL-wide distribution. The database will allow the quick retrieval of all information collected on the ORNL LLLW system and will greatly benefit any LLLW analysis effort. This report summarizes the results for the analyses performed to date on the LLLW system.
Date:
August 1, 1994
Creator:
Abraham, T. J.; DePaoli, S. M.; Robinson, S. M. & Walker, A. B.
Object Type:
Report
System:
The UNT Digital Library
Health effects models for nuclear power plant accident consequence analysis: Modifications of models resulting from recent reports on health effects of ionizing radiation
The Nuclear Regulatory Commission has sponsored several studies to identify and quantify the potential health effects of accidental releases of radionuclides from nuclear power plants. The most recent health effects models resulting from these efforts were published in two reports, NUREG/CR-4214, Rev. 1, Part 1 (1990) and Part 2 (1989). Several major health effects reports have been published recently that may impact the health effects models presented in these reports. This addendum to the Part 2 (1989) report, provides a review of the 1986 and 1988 reports by the United Nations Scientific Committee on the Effects of Atomic Radiation, the National Academy of Sciences/National Research Council BEAR 5 Committee report and Publication 60 of the International Commission on Radiological Protection as they relate to this report. The three main sections of this addendum discuss early occurring and continuing effects, late somatic effects, and genetic effects. The major changes to the NUREG/CR-4214 health effects models recommended in this addendum are for late somatic effects. These changes reflect recent changes in cancer risk factors that have come from longer followup and revised dosimetry in major studies like that on the Japanese A-bomb survivors. The results presented in this addendum should be used …
Date:
August 1, 1991
Creator:
Abrahamson, S.; Bender, M. A.; Boecker, B. B.; Scott, B. R. & Gilbert, E. S.
Object Type:
Report
System:
The UNT Digital Library
ARAC`s site workstation final design and deployment
The Atmospheric Release Advisory Capability (ARAC) Center located at Lawrence Livermore National Laboratory, provides real-time estimates of the environmental consequences of accidental releases of radioactivity or other hazardous materials into the atmosphere anywhere in the world. ARAC`s expertise includes integrating a suite of local, regional and global dispersion models into a highly automated system. Since 1979, on-site computers have provided the link between DOE and DOD facilities around the U.S. and the ARAC Center. Beginning in 1993, these facilities have been replacing their personal computers with UNIX workstations running ARAC`s Site Workstation Systems (SWS) software. The SWS consists of a collection of applications that help sites prepare for and respond to incidents involving an atmospheric release. The SWS can be used either as a real-time emergency-response tool or to make historical or hypothetical assessments of releases.
Date:
August 1, 1994
Creator:
Abriam, R. O. & Moore, R. M.
Object Type:
Article
System:
The UNT Digital Library
INEL BNCT Program
This Bulletin presents a summary of accomplishments and highlights in the Idaho National Engineering Laboratory's (INEL) Boron Neutron Capture Therapy (BNCT) Program for August 1991. This bulletin includes information on the brain tumor and melanoma research programs, Power Burst Facility (PBF) technical support and modifications, PBF operations, and updates to the animal data charts.
Date:
August 1, 1991
Creator:
Ackermann, A. L.
Object Type:
Report
System:
The UNT Digital Library
Power Burst Facility/Boron Neutron Capture Therapy Program for cancer treatment
This report discusses monthly progress in the Power Boron Facility/Boron Neutron Capture Therapy (PBF/BNCT) Program for Cancer Treatment. Highlights of the PBF/BNCT Program during August 1990 include progress within the areas of: Gross Boron Analysis in Tissue, Blood, and Urine, boron microscopic (subcellular) analytical development, noninvasive boron quantitative determination, analytical radiation transport and interaction modeling for BNCT, large animal model studies, neutron source and facility preparation, administration and common support and PBF operations.
Date:
August 1, 1990
Creator:
Ackermann, A.L. (ed.) & Dorn, R.V. III.
Object Type:
Report
System:
The UNT Digital Library
Spectrofluorometric Probe Method for Examining Preferential Solvation in Binary Solvent Mixtures
Article on spectrofluorometric probe method for examining preferential solvation in binary solvent mixtures.
Date:
August 1, 1993
Creator:
Acree, William E. (William Eugene); Wilkins, Denise C. & Tucker, Sheryl A. (Sheryl Ann)
Object Type:
Article
System:
The UNT Digital Library
Effect of Solvent Polarity on the Fluorescence Emission Spectra of Select Five- and Six-Ring Pyrene Derivatives
Article on the effect of solvent polarity on the fluorescence emission spectra of select five- and six-ring pyrene derivatives.
Date:
August 1, 1990
Creator:
Acree, William E. (William Eugene); Zvaigzne, Anita I. & Fetzer, John C.
Object Type:
Article
System:
The UNT Digital Library
Lagrangian with off-shell vertices and field redefinitions
Meson exchange diagrams following from a lagrangian with off-shell meson-nucleon couplings are compared with those generated from conventional dynamics. The off-shell interactions can be transformed away with the help of a nucleon field redefinition. Contributions to the NN- and 3N-potentials and nonminimal contact e.m. meson-exchange currents are discussed, mostly for an important case of scalar meson exchange.
Date:
August 1, 1997
Creator:
Adam, J.; Gross, Franz & Orden, J.W. Van
Object Type:
Article
System:
The UNT Digital Library
Alarm annunciation in a graphical environment
Well-designed graphical user interfaces, such as Microsoft Windows{trademark} or UNIX{trademark} -- based X-Windows, provide a capability for enhanced display of security alarm information. Conversely, a poorly designed interface can quickly overwhelm an operator. This paper describes types of graphical information that can be displayed and offers guidance on how to best display that information. Limits are proposed for the complexity of the user interface, and guidelines are suggested for the display of maps and sensors.
Date:
August 1, 1994
Creator:
Adams, D. G.
Object Type:
Article
System:
The UNT Digital Library
National Low-Level Waste Management Program radionuclide report series. Volume 13, Curium-242
This report, Volume 13 of the National Low-Level Waste Management Program Radionuclide Report Series, discusses the radiological and chemical characteristics of curium-242 ({sup 242}Cm). This report also includes discussions about waste types and forms in which {sup 242}Cm can be found and {sup 242}Cm behavior in the environment and in the human body.
Date:
August 1, 1995
Creator:
Adams, J.P.
Object Type:
Report
System:
The UNT Digital Library