Strongly coupled ionic mixtures and the H/He EOS (open access)

Strongly coupled ionic mixtures and the H/He EOS

This paper summarizes recent work on the strongly coupled OCP and Binary Ionic Mixture equation of state and other thermodynamic quantities in white dwarf interior conditions for both fluid and solid phases with the assumption of a uniform background. Conditions for phase separation of different elements in fluid or solid phases is strongly dependent on deviations from the linear mixing rule which gives the equation of state as an additive function of the OCP equation of state. These deviations turn out to be small (a few parts in 10{sup 5}) and always positive including the case where the fraction of the higher Z component approaches 0. Also the equation of state of strongly coupled light elements (H and He particularly) obtained from simulations with a linear response description of the electrons is given for conditions appropriate to brown dwarf star interiors. Recent Livermore work on a band structure calculation of the enthalpy of H and He mixtures under jovian conditions is discussed. This work leads to a prediction of a high temperature (15,000 K) for miscibility of He in ionized H at 10 Mb.
Date: December 2, 1993
Creator: DeWitt, H. E.
Object Type: Article
System: The UNT Digital Library
Improved measurement accuracy in a Long Trace Profiler: Compensation for laser pointing instability (open access)

Improved measurement accuracy in a Long Trace Profiler: Compensation for laser pointing instability

Laser pointing instability adds to the error of slope measurements taken with the Long Trace Profiler (LTP). As with carriage pitch error, this laser pointing error must be accounted for and subtracted from the surface under test (SUT) slope measurement. In the past, a separate reference beam (REF) allowed characterization of the component of slope error from carriage pitch. However, the component of slope error from laser pointing manifests itself differently in the SUT measured slope. An analysis of angle error propagation is given, and the effect of these errors on measured slope is determined. Then a method is proposed for identifying these errors and subtracting them from the measured SUT slope function. Separate measurements of carriage pitch and laser pointing instability isolate these effects, so that the effectiveness of the error identification algorithm may be demonstrated.
Date: August 2, 1993
Creator: Irick, S. C.
Object Type: Article
System: The UNT Digital Library
Overview of the Chemical Weapons Convention (open access)

Overview of the Chemical Weapons Convention

My subject this morning is a very brief overview of the Chemical Weapons Convention. Much has already been written describing and summarizing the Convention, including several of the Supplementary Papers and the Annex contained within the draft Manual. It is not my goal to restate what many of you already know. Rather, in the short time available, I want to focus on the parts of the Convention that are addressed in the draft Manual, that is, I want to highlight for you those aspects of the CWC that require implementation by individual State Parties. As I do so, I will show you where in the draft Manual each of these matters is addressed so that you can see how our document corresponds to the Convention`s requirements. This will provide a bridge between the plenary sessions and workshops that will consider the implementing measures and the Supplementary Papers in the Manual. In organizing my talk to focus on aspects of the Convention requiring national implementing measures, I necessarily leave out certain of its provisions. Among these intentional omissions are, with all due respect to our hosts, the structure and function of the OPCW, the Annex on Chemicals, and various operational aspects …
Date: December 2, 1993
Creator: Tanzman, E. A.
Object Type: Article
System: The UNT Digital Library
DOE lockout/tagout safety handbook (open access)

DOE lockout/tagout safety handbook

In September 1989, the Occupational Safety and Health Administration (OSHA) issued a final ruling on lockout/tagout procedures. This ruling became effective in January 1990 and was eventually incorporated into the Code of Federal Regulations. The purpose of these procedures is to safeguard employees from hazardous energy while performing service or maintenance activities on machines and equipment. Approximately 39 million workers are protected by lockout/tagout procedures in general industry. OSHA estimates that adherence to the requirements in lockout/tagout procedures will eliminate nearly two percent of all workplace deaths. A lockout/tagout program is essential to the safe operation of all Department of Energy (DOE) facilities. The program outlined in this document consists of energy-control procedures, employee training and periodic inspections, and establishes the minimum requirements for lockout/tagout of equipment or system-energy sources that could cause injury to personnel. Because serious consequences can occur due to a lack of understanding and improper administration of this program, this document also includes a method for: Providing guidance for the control of hazardous energy, protecting employees from injury, defining responsibilities, and protecting equipment and facilities from damage.
Date: September 2, 1993
Creator: Ulm, B.
Object Type: Report
System: The UNT Digital Library
[Research at the Notre Dame Radiation Laboratory]. Quarterly report, April 1--June 30, 1993 (open access)

[Research at the Notre Dame Radiation Laboratory]. Quarterly report, April 1--June 30, 1993

Forty-four abstracts are presented of research projects in radiation chemistry, photochemistry, and related topics.
Date: August 2, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Regenerative fuel cells for High Altitude Long Endurance Solar Powered Aircraft (open access)

Regenerative fuel cells for High Altitude Long Endurance Solar Powered Aircraft

High Altitude Long Endurance (HALE) unmanned missions appear to be feasible using a lightweight, high efficiency, span-loaded, Solar Powered Aircraft (SPA) which includes a Regenerative Fuel Cell (RFC) system and novel tankage for energy storage. An existing flightworthy electric powered flying wing design was modified to incorporate present and near-term technologies in energy storage, power electronics, aerodynamics, and guidance and control in order to design philosophy was to work with vendors to identify affordable near-term technological opportunities that could be applied to existing designs in order to reduce weight, increase reliability, and maintain adequate efficiency of components for delivery within 18 months. The energy storage subsystem for a HALE SPA is a key driver for the entire vehicle because it can represent up to half of the vehicle weight and most missions of interest require the specific energy to be considerably higher than 200 W-hr/kg for many cycles. This stringent specific energy requirement precludes the use of rechargeable batteries or flywheels and suggests examination of various RFC designs. An RFC system using lightweight tankage, a single fuel cell (FC) stack, and a single electrolyzer (EC) stack separated by the length of a spar segment (up to 39 ft), has specific …
Date: June 2, 1993
Creator: Mitlitsky, F.; Colella, N. J.; Myers, B. & Anderson, C. J.
Object Type: Article
System: The UNT Digital Library
Wetland Treatment of Oil and Gas Well Wastewaters. Quarterly Technical Report, November 25, 1992--February 24, 1993 (open access)

Wetland Treatment of Oil and Gas Well Wastewaters. Quarterly Technical Report, November 25, 1992--February 24, 1993

During the first quarter of the above contract, all the elements of Task 1 were completed. The first quarterly report presented an overview of a wetland and its increasing use in industrial wastewater treatment. An idealized, reaction engineering description of wetlands was presented to demonstrate how the various processes that occur in a wetland can be modeled. Previous work on the use of wetlands to remove BOD, TSS, Phosphorus and Nitrogen was reviewed. Recent literature on the application of wetland technology to the treatment of petroleum-related wastewater was critically evaluated and an outline of the research plans for the first year was delineated. Further, our literature search (nominally completed under Task 1) unearthed more recent studies (some unpublished) and a summary was included in the second quarterly report. In the second quarterly report, results of our efforts on the construction of a laboratory-type wetland were also reported. Initial studies on the use of wetland amendments such as modified-clays and algae cells were presented and discussed. Adsorption of heavy metal ions, Cu{sup 2+} and Cr(VI) onto soils drawn from the laboratory-type wetland built as a part of this contract has been undertaken and these results are presented and discussed in this …
Date: April 2, 1993
Creator: Kadlec, R. H. & Srinivasan, K. R.
Object Type: Report
System: The UNT Digital Library
Environmental assessment for the recycling of slightly activated copper coil windings from the 184-Inch Cyclotron at Lawrence Berkeley Laboratory, Berkeley, California (open access)

Environmental assessment for the recycling of slightly activated copper coil windings from the 184-Inch Cyclotron at Lawrence Berkeley Laboratory, Berkeley, California

The proposed action is to recycle slightly activated copper that is currently stored in a warehouse leased by Lawrence Berkeley Laboratory (LBL) to a scrap metal dealer. Subsequent reutilization of the copper would be unrestricted. This document addresses the potential environmental effects of recycling and reutilizing the activated copper. In addition, the potential environmental effects of possible future uses by the dealer are addressed. Direct environmental effects from the proposed action are assessed, such as air emissions from reprocessing the activated copper, as well as indirect beneficial effects, such as averting air emissions that would result from mining and smelting an equivalent quantity of copper ore. Evaluation of the human health impacts of the proposed action focuses on the pertinent issues of radiological doses and protection of workers and the public. Five alternatives to the proposed action are considered, and their associated potential impacts are addressed. The no-action alternative is the continued storage of the activated copper at the LBL warehouse. Two recycling alternatives are considered: recycling the activated copper at the Scientific Ecology Group (SEG) facility for re-use at a DOE facility and selling or giving the activated copper to a foreign government. In addition, two disposal alternatives evaluate …
Date: August 2, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
PNL-MA-70 QA Plan (open access)

PNL-MA-70 QA Plan

The Instrument and External Dosimetry Section provides the calibration service for all portable radiation monitoring measuring and test equipment used on the Hanford Site. This document outlines the quality assurance (QA) plan for the Instrument Calibration and Evaluation Program. The scope of the QA plan in outlined, requirement specifications are provided, and QA program/organization and impact level are discussed.
Date: June 2, 1993
Creator: Ethridge, L. J.
Object Type: Report
System: The UNT Digital Library
D0 Solenoid Upgrade Project: Vacuum Pumping Calculations for the D0 Solenoid (open access)

D0 Solenoid Upgrade Project: Vacuum Pumping Calculations for the D0 Solenoid

This engineering note documents the calculations done to determine the vacuum pumping speed for the D-Zero solenoid. The raw calculations are attached. A summary of the results are listed. The vacuum pumping speed of the solenoid is determined by the conductance of the pumping path. At higher pressure ranges during initial pumpdown, the conductances will be rather high. Calculations were not done for the transient pumpdown period, only the steady state type pumping situation. The pressure is assumed to be on the order of 10E-7 torr. This is the free molecular flow regime based on Knudsen number. This pressure regime is also where the pumping speed would be least. The conductances were calculated based on pumping helium gas at a temperature of 300 Kelvin. The total conductance of the pumping path from the solenoid to the inlet of the turbomolecular pump is 11.8 L/s. The effective pumping speed of a 1000 L/s turbo pump attached to this pumping path is 11.7 L/s. The minimum required pumping speed for design purposes was set at 4.3 L/s. This value was arrived at by assuming a warm leak size (10E-8 atm-cc/sec) was not detected during fabrication of the solenoid. It is then assumed …
Date: August 2, 1993
Creator: Rucinski, R.
Object Type: Report
System: The UNT Digital Library
Energy information sheets (open access)

Energy information sheets

The National Energy Information Center (NEIC), as part of its mission, provides energy information and referral assistance to Federal, State, and local governments, the academic community, business and industrial organizations, and the general public. Written for the general public, the EIA publication Energy Information Sheets was developed to provide information on various aspects of fuel production, prices, consumption and capability. The information contained herein pertains to energy data as of December 1991. Additional information on related subject matter can be found in other EIA publications as referenced at the end of each sheet.
Date: December 2, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Analytic properties of the OCP and ionic mixtures in the strongly coupled fluid state (open access)

Analytic properties of the OCP and ionic mixtures in the strongly coupled fluid state

Exact results for the Madelung constants and first order anharmonic energies are given for the inverse power potentials with the Coulomb potential as the softest example. Similar exact results are obtained using the analysis of Rosenfeld on the {Gamma} {yields} {infinity} limit for the OCP internal energy, direct correlation function, screening function, and bridge functions. Knowing these exact limits for the fluid phase of the OCP allows one to determine the nature of the thermal corrections to the strongly coupled results. Solutions of the HNC equation modified with the hard sphere bridge function give an example.
Date: December 2, 1993
Creator: DeWitt, H. E.
Object Type: Article
System: The UNT Digital Library
Graphical user interface for AMOS and POISSON (open access)

Graphical user interface for AMOS and POISSON

A graphical user interface (GUI) exists for building model geometry for the time-domain field code, AMOS. This GUI has recently been modified to build models and display the results of the Poisson electrostatic solver maintained by the Los Alamos Accelerator Code Group called POISSON. Included in the GUI is a 2-D graphic editor allowing interactive construction of the model geometry. Polygons may be created by entering points with the mouse, with text input, or by reading coordinates from a file. Circular arcs have recently been added. Once polygons are entered, points may be inserted, moved, or deleted. Materials can be assigned to polygons, and are represented by different colors. The unit scale may be adjusted as well as the viewport. A rectangular mesh may be generated for AMOS or a triangular mesh for POISSON. Potentials from POISSON are represented with a contour plot and the designer is able to mouse click anywhere on the model to display the potential value at that location. This was developed under the X windowing system using the Motif look and feel.
Date: March 2, 1993
Creator: Swatloski, T. L.
Object Type: Article
System: The UNT Digital Library
X-324: An upgrade to the NSLS X-Ray Ring using B factory technology (open access)

X-324: An upgrade to the NSLS X-Ray Ring using B factory technology

Through much of the last decade, the NSLS has been America`s preeminent source of synchrotron radiation. In the near future, The NSLS will face formidable competition from the third generation light sources, designed to produce high brightness beams from undulators. Because of the lattice design of the NSLS rings and the limited number of straight sections for new undulators it will be impossible to compete with the new rings in brightness at short wavelengths. It is not clear, however, how many experiments really need brightness and how many just need flux. A good strategy could lie in keeping the NSLS the highest flux synchrotron light source in the country and leaving the brightness frontier to the third generation rings. By using the technology developed for the SLAC B factory we can simultaneously raise the X-Ray Ring energy to 3.0 GeV and the current to 2.4 Amp. From these parameters I am calling the proposed upgrade X-324. After the X-324 upgrade, the X-Ray Ring will produce twenty times more synchrotron radiation power than is produced by today`s 250 mA, 2.5 GeV beams. This is a qualitative change from today`s conditions and will place great demands on the RF and vacuum systems. …
Date: December 2, 1993
Creator: Blum, E. B.
Object Type: Report
System: The UNT Digital Library
Soil washwater treatment system operating procedure (open access)

Soil washwater treatment system operating procedure

This report describes the Met-Pro Physical Chemical Treatment System which incorporates numerous integrated processes either physical or chemical in nature. They include the following: coagulation with chemicals; rapid mixing to assure intimate contact of influent and coagulant; controlled flocculation for maximum flock growth via addition of polymer; extended time clarification for optimum settling of solids; solids collection and disposal, and recycle for seeding; filtration for additional suspended solids removal; and ion exchange removal of uranium and heavy metals.
Date: November 2, 1993
Creator: Green, J. W.
Object Type: Report
System: The UNT Digital Library
Riverland ERA maintenance pad site diesel contamination risk assessment (open access)

Riverland ERA maintenance pad site diesel contamination risk assessment

The maintenance pad site consists of a concrete pad and underlying soils, approximately 15 by 46 m in area, and a drainage ditch with dimensions of 2.4 by 91 m. The ditch is located approximately 60 m from the concrete pad and is oriented parallel to the pads long axis. The facility was built in 1943, at which time the concrete pad was the floor of a maintenance shed for railroad activities. In 1955, use of the facility as a maintenance shed was discontinued. Between 1955 and 1957, the facility was used as a radioactivity decontamination area for railroad cars; acetone-soaked rags were used to remove surface contamination from the cars. The concrete pad was washed down with a mixture of water and diesel fuel, which was then flushed via clay pipe to the drainage ditch. In 1963, the maintenance shed was torn down and the concrete pad covered with approximately one-half meter of fill. The concrete pad was re-exposed in 1993. The site was sampled for Toxicity Characteristic Leachate Procedure (TCLP) metals, volatile, and semi-volatile compounds, as well as for extractable fuel hydrocarbons. A total of 17 samples were collected from surface concrete, soil beneath surface concrete, and ditch …
Date: December 2, 1993
Creator: Valcich, P. J.
Object Type: Report
System: The UNT Digital Library
Geologic research of conventional and unconventional hydrocarbon resources. Quarterly report, October 1, 1992--March 1, 1993 (open access)

Geologic research of conventional and unconventional hydrocarbon resources. Quarterly report, October 1, 1992--March 1, 1993

This report covers the period from October 1, 1992 to March 1, 1993. The overall goals of the program task are to provide a final synthesis of six deep seismic reflection profiles and other geological and geophysical data from the southern Washington Cascades region where a probable extensive deep sedimentary basin has been discovered. This deep sedimentary basin is hypothesized from geological, regional magnetotelluric (MT), gravity, magnetic , and seismic reflection data as described in the American Association of Petroleum Geologists (AAPG) article by Stanley and others (1992). This report analyzed three seismic reflection profiles acquired by the Morgantown Energy Technology Centers in combination with the extensive MT and other data to outline a probable geological model for a thick conductive section of rocks in the southern Washington Cascades (called the Southern Washington Cascades conductor, SWCC). Earlier MT models suggested that the section consisted of an east-dipping package that extended to depths of as much as 20 km but appeared to surface in the Bear Canyon area near Morton, Washington and along the axis of the Carbon River and Morton anticlines. Interpretation of the first three DOE seismic reflection approximately confirmed the MT interpretation and added new information on anticlinal …
Date: March 2, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Advanced steady-state operating scenarios (open access)

Advanced steady-state operating scenarios

The goal for advanced steady-state operation in ITER should be to demonstrate the operation of the plasma core for a steady-state fusion reactor. To accomplish this the authors must develop steady-state operating scenarios at high beta for high fusion power density, low auxiliary power requirements (Q{sub CD} {ge} 25, where Q{sub CD} {triple_bond}P fusion/P{sub CD} and P{sub DC} is the power required for sustaining the plasma current) for low recirculating power requirements, and at moderate safety factor (q{sub {psi}} {le} 4.5) to minimize the cost for the tokamak core of a steady-state demonstration power reactor based on the operating modes demonstrated in ITER. The key to achieving steady-state operation at high fusion power in ITER will be the development of operating scenarios with very high bootstrap current fractions (f{sub BS} {ge} 90%) in which the radial profile of the bootstrap current density is well aligned with that of the total plasma current density, and for which the MHD {beta}-limit exceeds {beta}{sub n}{sup *} = 0.05 T{minus}m/MA. They are in the process of developing such operating modes for ITER. In {section}1 they propose two advanced steady-state operating points; a preliminary operating point that was the basis for the MHD studies reported …
Date: December 2, 1993
Creator: Nevins, W. M.; Bulmer, R. H.; Pearlstein, L. D.; Haney, S. W. & Manickam, J.
Object Type: Report
System: The UNT Digital Library
Uranium in soils integrated demonstration site characterization at Fernald, Ohio. Report of uranium concentrations in soil determined by in situ LA-ICP-AES (open access)

Uranium in soils integrated demonstration site characterization at Fernald, Ohio. Report of uranium concentrations in soil determined by in situ LA-ICP-AES

Laser ablation-inductively coupled plasma-atomic emission spectrometry was used for in situ determination of uranium and thorium concentrations in soil at 80 sampling sites in the Sewage Treatment Plant area. This work was performed by the Environmental Technology Development Program of the Ames Laboratory using a completely self-contained mobile laboratory. This laboratory, the mobile demonstration laboratory for environmental screening technologies and the robotic sampling accessory, were designed and constructed by the Ames Laboratory during FY 1992. The instrumentation is capable of analyzing each sample for twenty operator-defined elements simultaneously. Using the MDLEST/RSA, the uranium concentrations in the soil at the 80 sampling sites were found to range from <20 parts-per-million (ppM)(<13.5 pCi/g) to 303 ppM (205 pCi/g). The 95% confidence interval for these field determined values range from 80 to 110 ppM. Bore hole samples from two sites were analyzed. No measurable uranium concentration was detected below the one foot depth. Seven samples taken from sites within an area currently under remediation were analyzed and found to contain uranium concentrations ranging from 101 ppM (68.3 pCi/g) to 788 ppM (532 pCi/g). Soil samples were taken from twelve of the 80 sampling sites in the field, using conventional sampling techniques. These samples …
Date: February 2, 1993
Creator: Baldwin, D.; Zamzow, D. & Bajic, S. J.
Object Type: Report
System: The UNT Digital Library
Material properties and fracture mechanics in relation to ceramic machining (open access)

Material properties and fracture mechanics in relation to ceramic machining

Material removal rate, surface finish, and subsurface damage are largely governed by fracture mechanics and plastic deformation, when ceramics are machined using abrasive methods. A great deal of work was published on the fracture mechanics of ceramics in the late 1970s and early 1980s, although this work has never resulted in a comprehensive model of the fixed abrasive grinding process. However, a recently published model describes many of the most important features of the loose abrasive machining process, for example depth of damage, surface roughness, and material removal rate. Many of the relations in the loose abrasive machining model can be readily discerned from fracture mechanics models, in terms of material properties. By understanding the mechanisms of material removal, from a material properties perspective, we can better estimate how one material will machine in relation to another. Although the fracture mechanics models may have been developed for loose abrasive machining, the principles of crack initiation and propagation are equally valuable for fixed abrasive machining. This report provides a brief review of fracture in brittle materials, the stress distribution induced by abrasives, critical indenter loads, the extension of cracks, and the relation of the fracture process to material removal.
Date: December 2, 1993
Creator: Griffith, L. V.
Object Type: Report
System: The UNT Digital Library
Nuclear weapons issues in South Asia (open access)

Nuclear weapons issues in South Asia

This report discusses how the US can play a productive mediating role in South Asia by engaging India and Pakistan in an international forum to manage nuclear weapons, as Edward Teller advocated. India and Pakistan have developed their nuclear capabilities because they fear their neighbors, not because they want to threaten fear their neighbors, not because they want to threaten the US. The appropriate response for the US, therefore, is diplomatic engagement and negotiations. In addition to the international approach, encouragement and facilitation of regional and bilateral interactions will also be important. Formal arms control agreements have been reached, but less formal confidence-building measures, and unilateral security pledges may well be combined to form a more secure strategic environment in South Asia than a nuclear armed confrontation across the porous South Asian border.
Date: July 2, 1993
Creator: Joeck, N.
Object Type: Article
System: The UNT Digital Library
Economics of electron beam and electrical discharge processing for post-combustion NO{sub x} control in internal combustion engines (open access)

Economics of electron beam and electrical discharge processing for post-combustion NO{sub x} control in internal combustion engines

This paper discusses the physics and chemistry of non-thermal plasma processing for post-combustion NO{sub x} control in internal combustion engines. A comparison of electron beam and electrical discharge processing is made regarding their power consumption, radical production, NO{sub x} removal mechanisms, and by-product formation. Pollution control applications present a good opportunity for transferring pulsed power techniques to the commercial sector. However, unless advances are made to drastically reduce the price and power consumption of electron beam sources and pulsed power systems, these plasma techniques will not become commercially competitive with conventional thermal or surface-catalytic methods.
Date: August 2, 1993
Creator: Penetrante, B. M.
Object Type: Article
System: The UNT Digital Library
Welding of niobium to stainless (open access)

Welding of niobium to stainless

Experiences are reported of welding niobium to stainless steel for the TESLA accelerator superconducting cavities.
Date: November 2, 1993
Creator: Kuchnir, M. & Hiller, R. E.
Object Type: Report
System: The UNT Digital Library
Cost and quality of fuels for electric utility plants, 1992 (open access)

Cost and quality of fuels for electric utility plants, 1992

This publication presents an annual summary of statistics at the national, Census division, State, electric utility, and plant levels regarding the quantity, quality, and cost of fossil fuels used to produce electricity. The purpose of this publication is to provide energy decision-makers with accurate and timely information that may be used in forming various perspectives on issues regarding electric power.
Date: August 2, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library