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open access

Classification of hydrostratigraphic units at the Savannah River Site, South Carolina

Description: A detailed synthesis of the hydrologic, geophysical and core data from wells penetrating the updip Mesozoic-Cenozoic Coastal Plain sequence at and near the Savannah River Site (SRS) was conducted to define and classify the hydrostratigraphic units. The purpose of the study was to give the SRS a single unified hydrostratigraphic classification that defines and addresses the hydrogeologic characteristics of the aquifers underlying the site. The characterization, areal distribution and classificat… more
Date: December 1, 1990
Creator: Aadland, R. K. & Bledsoe, H. W.
Partner: UNT Libraries Government Documents Department
open access

Classification of hydrostratigraphic units at the Savannah River Site, South Carolina

Description: A detailed synthesis of the hydrologic, geophysical and core data from wells penetrating the updip Mesozoic-Cenozoic Coastal Plain sequence at and near the Savannah River Site (SRS) was conducted to define and classify the hydrostratigraphic units. The purpose of the study was to give the SRS a single unified hydrostratigraphic classification that defines and addresses the hydrogeologic characteristics of the aquifers underlying the site. The characterization, areal distribution and classificat… more
Date: December 1, 1990
Creator: Aadland, R. K. & Bledsoe, H. W.
Partner: UNT Libraries Government Documents Department
open access

New technologies for item monitoring

Description: This report responds to the Department of Energy`s request that Sandia National Laboratories compare existing technologies against several advanced technologies as they apply to DOE needs to monitor the movement of material, weapons, or personnel for safety and security programs. The authors describe several material control systems, discuss their technologies, suggest possible applications, discuss assets and limitations, and project costs for each system. The following systems are described: … more
Date: December 1, 1993
Creator: Abbott, J. A. & Waddoups, I. G.
Partner: UNT Libraries Government Documents Department
open access

Characterization of surfactants in the presence of oil for steam foam application

Description: The steam foam process has been applied in the oil fields since the late 1970`s. The mechanism of the process, however, is not known fully; particularly the detrimental effects of oil on foam, while known, are still unexplained. Understanding the mechanisms of foam generation, stability, and mobility of foam to improve the development of field level projects has been the focus of the attention of many workers of the oil industry. Extensive laboratory studies have been carried out, mostly withou… more
Date: December 1, 1992
Creator: Abdul-Razzaq & Castanier, L. M.
Partner: UNT Libraries Government Documents Department
open access

Characterization of surfactants in the presence of oil for steam foam application

Description: The steam foam process has been applied in the oil fields since the late 1970's. The mechanism of the process, however, is not known fully; particularly the detrimental effects of oil on foam, while known, are still unexplained. Understanding the mechanisms of foam generation, stability, and mobility of foam to improve the development of field level projects has been the focus of the attention of many workers of the oil industry. Extensive laboratory studies have been carried out, mostly withou… more
Date: December 1, 1992
Creator: Abdul-Razzaq & Castanier, L.M.
Partner: UNT Libraries Government Documents Department
open access

Design characteristics for facilities which process hazardous particulate

Description: Los Alamos National Laboratory is establishing a research and processing capability for beryllium. The unique properties of beryllium, including light weight, rigidity, thermal conductivity, heat capacity, and nuclear properties make it critical to a number of US defense and aerospace programs. Concomitant with the unique engineering properties are the health hazards associated with processing beryllium in a particulate form and the potential for worker inhalation of aerosolized beryllium. Bery… more
Date: December 1, 1998
Creator: Abeln, S.P.; Creek, K. & Salisbury, S.
Partner: UNT Libraries Government Documents Department
open access

Role of C, O and H in III-V nitrides

Description: The light ion impurities C, 0 and H have been implanted or diffused into GaN and related compounds and their effect on the electrical properties of these materials measured by Hall, C-V and SIMS as a function of annealing temperatures from 300--11OO{degree}C. While C in as-grown GaN appears to create an acceptor under MOMBE conditions, implanted C shows no measurable activity. Similarly, implanted 0 does not show any shallow donor activity after annealing at {le}700{degree}C, but can create hig… more
Date: December 1, 1995
Creator: Abernathy, C. R.; Pearton, S. J.; MacKenzie, J. D.; Lee, J. W.; Vartuli, C. B.; Wilson, R. G. et al.
Partner: UNT Libraries Government Documents Department
open access

Comparison of ICl- and IBr-Based Plasma Chemistries for Inductively Coupled Plasma Etching of GaN, InN and AlN

Description: A parametric study of the etch characteristics of GaN, AIN and InN has been earned out with IC1/Ar and IBr/Ar chemistries in an Inductively Coupled Plasma discharge. The etch rates of InN and AIN were relatively independent of plasma composition, while GaN showed increased etch rates with interhalogen concentration. Etch rates for all materials increased with increasing rf chuck power, indicating that higher ion bombardment energies are more efficient in enhancing sputter resorption of etch pro… more
Date: December 1, 1998
Creator: Abernathy, C.R.; Cho, H.; Donovan, S.M.; Hahn, Y.B.; Han, J.; Hays, D.C. et al.
Partner: UNT Libraries Government Documents Department
open access

A novel approach to highly dispersing catalytic materials in coal for gasification. Final technical report, September 1989--November 1992

Description: The objectives of this project were to investigate the effects of coal surface charge on the uptake of aqueous soluble metal catalysts from solution and to determine the influence of the interfacial interaction on char reactivity. Another goal is to assess the potential of using potassium carbonate, potassium acetate or their mixtures as catalysts for char gasification. The lower cost and the high catalytic activity of the latter compound will produce economic benefits by reducing the amount of… more
Date: December 1, 1992
Creator: Abotsi, G. M. K. & Bota, K. B.
Partner: UNT Libraries Government Documents Department
open access

Characterization plan for Hanford spent nuclear fuel

Description: Reprocessing of spent nuclear fuel (SNF) at the Hanford Site Plutonium-Uranium Extraction Plant (PUREX) was terminated in 1972. Since that time a significant quantity of N Reactor and Single-Pass Reactor SNF has been stored in the 100 Area K-East (KE) and K-West (KW) reactor basins. Approximately 80% of all US Department of Energy (DOE)-owned SNF resides at Hanford, the largest portion of which is in the water-filled KE and KW reactor basins. The basins were not designed for long-term storage o… more
Date: December 1, 1994
Creator: Abrefah, J.; Thornton, T. A.; Thomas, L. E.; Berting, F. M. & Marschman, S. C.
Partner: UNT Libraries Government Documents Department
open access

Preconditioned gradient methods for sparse linear systems for very `large structural` problems

Description: This paper deals with background and practical experience with preconditioned gradient methods for sparse linear systems for `very large` structural problems. The conjugate gradient method with diagonal preconditioning (CG/D) is demonstrated to substantially increase the size of structural problems that can be analyzed, significantly reduce computer storage requirements, and cut computing cost; thus allowing for much more detailed modeling and increased engineering efficiency. For one case for … more
Date: December 1, 1995
Creator: Abu-Shumays, I.K.; Hutula, D.N.; Haan, J.J. & Myers, G.T.
Partner: UNT Libraries Government Documents Department
open access

Healing of lithographically introduced flaws in glass and glass containing ceramics

Description: The morphological evolution of cylindrical pores or ``channels`` and crack-like cavities in glass and glass-containing ceramics at elevated temperatures was studied. The systems studied were: Coming 7056 alkali borosilicate glass, soda-lime glass (microscope slides), a commercially available 96% Al{sub 2}O{sub 3}with {approx}5--10% intergranular glass, 96% Al{sub 2}O{sub 3} bonded to sapphire, and a model sapphire/glass/sapphire system fabricated by diffusion bonding etched and unetched pieces … more
Date: December 1, 1992
Creator: Ackler, H. D.
Partner: UNT Libraries Government Documents Department
open access

Healing of lithographically introduced flaws in glass and glass containing ceramics

Description: The morphological evolution of cylindrical pores or channels'' and crack-like cavities in glass and glass-containing ceramics at elevated temperatures was studied. The systems studied were: Coming 7056 alkali borosilicate glass, soda-lime glass (microscope slides), a commercially available 96% Al[sub 2]O[sub 3]with [approx]5--10% intergranular glass, 96% Al[sub 2]O[sub 3] bonded to sapphire, and a model sapphire/glass/sapphire system fabricated by diffusion bonding etched and unetched pieces of… more
Date: December 1, 1992
Creator: Ackler, H. D.
Partner: UNT Libraries Government Documents Department
open access

The design and construction of a double-sided Silicon Microvertex Detector for the L3 experiment at CERN

Description: A Silicon Microvertex Detector (SMD) has been commissioned for the L3 experiment at the Large Electron-Positron colliding-beam accelerator (LEP) at the European Center for Nuclear Physics, (CERN). The SMD is a 72,672 channel, two layer barrel tracker that is comprised of 96 ac-coupled, double-sided silicon detectors. Details of the design and construction are presented.
Date: December 1, 1993
Creator: Adam, A.; Ahlen, S.; Marin, A.; Zhou, B.; Ambrosi, G.; Babucci, E. et al.
Partner: UNT Libraries Government Documents Department
open access

High efficiency shale oil recovery. First quarter report, January 1, 1992--March 31, 1992

Description: The overall project objective is to demonstrate the high efficiency of the Adams Counter-Current shale oil recovery process. The efficiency will first be demonstrated at bench-scale, in the current phase, after which the demonstration will be extended to the operation of a small pilot plant. Thus the immediate project objective is to obtain data on oil shale retorting operations in a small batch rotary kiln that will be representative of operations in the proposed continuous process pilot plant… more
Date: December 1, 1992
Creator: Adams, D. C.
Partner: UNT Libraries Government Documents Department
open access

Steam generator secondary pH during a steam generator tube rupture

Description: The Nuclear Regulatory Commission requires utilizes to determine the response of a pressurized water reactor to a steam generator tube rupture (SGTR) as part of the safety analysis for the plant. The SGTR analysis includes assumptions regarding the partitioning of iodine between liquid and vapor in steam generator secondary. Experimental studies have determined that the partitioning of iodine in water is very sensitive to the pH. Based on this experimental evidence, the NRC requested the INEL t… more
Date: December 1, 1991
Creator: Adams, J. P. & Peterson, E. S.
Partner: UNT Libraries Government Documents Department
open access

Steam generator secondary pH during a steam generator tube rupture

Description: The Nuclear Regulatory Commission requires utilizes to determine the response of a pressurized water reactor to a steam generator tube rupture (SGTR) as part of the safety analysis for the plant. The SGTR analysis includes assumptions regarding the partitioning of iodine between liquid and vapor in steam generator secondary. Experimental studies have determined that the partitioning of iodine in water is very sensitive to the pH. Based on this experimental evidence, the NRC requested the INEL t… more
Date: December 1, 1991
Creator: Adams, J. P. & Peterson, E. S.
Partner: UNT Libraries Government Documents Department
open access

Monitoring Stresses on the Pv-4 Isostatic Press From 1960 to 1997

Description: The PV-4 isostatic press has a very large working volume (98 ft{sup 3}) that was designed for routine operations at internal pressures up to 30 ksi and is, therefore, a unique and valuable component of the U.S. DOE Y-12 manufacturing capability. More than 13,000 pressing operations have been conducted since initiation of operations in September 1960. The pressure vessel portion consists of three concentric cylinders of high-strength steel with the outer two cylinders shrink-fitted on the imermo… more
Date: December 1, 1998
Creator: Adamski, R. E.; Frazier, J. L.; Horak, J. A.; Howard, D. C. & Kelley, D. K.
Partner: UNT Libraries Government Documents Department
open access

The dynamic inelastic response of delaminated plates

Description: A generalized theory for laminated plates with delaminations is used to consider the influence of inelastic deformations on the dynamic behavior of composite plates with delaminations. The laminate model is based on a generalized displacement formulation implemented at the layer level. The delamination behavior can be modeled using any general interfacial fracture law: however, for the current work a linear model is employed. The interfacial displacement jumps are expressed in an internally con… more
Date: December 1, 1996
Creator: Addessio, F.L. & Williams, T.O.
Partner: UNT Libraries Government Documents Department
open access

Removal of trichloroethylene contamination from the subsurface: A comparative evaluation of different remediation strategies by means of numerical simulation

Description: Volatile organic compounds such as petroleum hydrocarbons and halogenated hydrocarbon solvents are common contaminants of the subsurface environment. Although immiscible with water, many of these organics have large enough aqueous phase solubilities to significantly degrade the quality of groundwater with which they come in contact. In addition, many of these substances exhibit high vapor pressures, causing them to partition strongly into the gas phase in their surroundings. Because of these pr… more
Date: December 1, 1990
Creator: Adenekan, A.E.; Pruess, K. & Falta, R.W.
Partner: UNT Libraries Government Documents Department
open access

Technical Support Section annual work plan for FY 1998

Description: The Technical Support Section (TSS) of the Instrumentation and Controls (I and C) Division of Oak Ridge National Laboratory (ORNL) provides technical services such as fabrication, modification, installation, calibration, operation, repair, and preventive maintenance of instruments and other related equipment. Because the activities and priorities of TSS must be adapted to the technical support needs of ORNL, the TSS Annual Work Plan is derived from, and is driven directly by, current trends in … more
Date: December 1, 1997
Creator: Adkisson, B. P.; Allison, K. L.; Effler, R. P.; Hess, R. A.; Keeble, T. A.; Odom, S. M. et al.
Partner: UNT Libraries Government Documents Department
open access

Photo- and Electroproduction of J{sup PC} = 1 {sup {-+}} exotics

Description: The authors estimate the kinematic dependence of the exclusive photo- and electroproduction of J{sup PC} = 1{sup {-+}} exotic mesons due to {pi} exchange. They show that the kinematic dependence is largely independent of the exotic meson form factor, which is explicitly derived for a 1{sup {-+}} isovector hybrid meson in the flux-tube model of Isgur and Paton. The relevance to experiments currently planned at Jefferson Lab is indicated.
Date: December 1, 1997
Creator: Afanasev, Andrei & Page, Philip R.
Partner: UNT Libraries Government Documents Department
open access

Relativistic charge form factor of the deuteron

Description: Relativistic integral representation in terms of experimental neutron-proton scattering phase shifts alone is used to compute the charge form factor of the deuteron G{sub Cd}(Q{sup 2}). The results of numerical calculations of {vert_bar}G{sub Cd}(Q{sup 2}){vert_bar} are presented in the interval of the four-momentum transfers squared 0 {<=} Q{sup 2} {<=} 35 fm{sup {minus}2}. Zero and the prominent secondary maximum in {vert_bar}G{sub Cd}(Q{sup 2}){vert_bar} are the direct consequences of … more
Date: December 1, 1997
Creator: Afanasev, Andrei V.; Afanasev, V.D. & Trubnikov, S.V.
Partner: UNT Libraries Government Documents Department
open access

Chemical composition profiles during alkaline flooding at different temperatures and extended residence times

Description: The objective of this work was to investigate whether or not caustic sweeps the major portion of the reservoir efficiently during an alkaline flood process. It was also the objective of this work to study the state of final equilibrium during a caustic flood through determination of the pH and chemical composition profiles along the porous medium. For this purpose, a long porous medium which provided extended residence times was required. It was necessary to set up the porous medium such that t… more
Date: December 1, 1992
Creator: Aflaki, R. & Handy, L. L.
Partner: UNT Libraries Government Documents Department
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