Engineering development of advanced coal-fired low-emission boiler systems (open access)

Engineering development of advanced coal-fired low-emission boiler systems

Project Work Plan was developed with joint participation by all subsystem teams. Comprehensive overall project activity schedules were developed for all individual B W groups and subcontractors with participation in Phase I.
Date: January 22, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Engineering development of advanced coal-fired low-emission boiler systems. Quarterly technical progress report and monthly status report (open access)

Engineering development of advanced coal-fired low-emission boiler systems. Quarterly technical progress report and monthly status report

Project Work Plan was developed with joint participation by all subsystem teams. Comprehensive overall project activity schedules were developed for all individual B&W groups and subcontractors with participation in Phase I.
Date: January 22, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Enhancing the use of coals by gas reburning-sorbent injection (open access)

Enhancing the use of coals by gas reburning-sorbent injection

The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO[sub x]) and sulfur (SO[sub x]) on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential and cyclone fired. The specific objectives are to demonstrate reductions of 60 percent in NO[sub x] and 50 percent in SO[sub x] emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI). With GR, about 80--85 percent of the coal fuel is fired in the primary combustion zone. The balance of the fuel is added downstream as natural gas to create a slightly fuel rich environment in which NO[sub x] is converted to N[sub 2]. The combustion process is completed by overfire air addition. SO[sub x] emissions are reduced by injecting dry sorbents (usually calcium based) into the upper furnace. The sorbents trap SO[sub x] as solid sulfates that are collected in the particulate control device. This project is conducted in three phases at each site: (1) Design and Permitting, (2) Construction and Startup, and (3) Operation, Data Collection, Reporting and Disposition: Technology transfer to industry is accomplished …
Date: January 22, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Enhancing the use of coals by gas reburning-sorbent injection. Quarterly report No. 21, October 1--December 31, 1992 (open access)

Enhancing the use of coals by gas reburning-sorbent injection. Quarterly report No. 21, October 1--December 31, 1992

The objective of this project is to evaluate and demonstrate a cost effective emission control technology for acid rain precursors, oxides of nitrogen (NO{sub x}) and sulfur (SO{sub x}) on two coal fired utility boilers in Illinois. The units selected are representative of pre-NSPS design practices: tangential and cyclone fired. The specific objectives are to demonstrate reductions of 60 percent in NO{sub x} and 50 percent in SO{sub x} emissions, by a combination of two developed technologies, gas reburning (GR) and sorbent injection (SI). With GR, about 80--85 percent of the coal fuel is fired in the primary combustion zone. The balance of the fuel is added downstream as natural gas to create a slightly fuel rich environment in which NO{sub x} is converted to N{sub 2}. The combustion process is completed by overfire air addition. SO{sub x} emissions are reduced by injecting dry sorbents (usually calcium based) into the upper furnace. The sorbents trap SO{sub x} as solid sulfates that are collected in the particulate control device. This project is conducted in three phases at each site: (1) Design and Permitting, (2) Construction and Startup, and (3) Operation, Data Collection, Reporting and Disposition: Technology transfer to industry is accomplished …
Date: January 22, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Final vegetative cover for closed waste sites (open access)

Final vegetative cover for closed waste sites

Low-level, hazardous, and mixed waste disposal sites normally require some form of plant material to prevent erosion of the final closure cap. Waste disposal sites are closed and capped in a complex scientific manner to minimize water infiltration and percolation into and through the waste material. Turf type grasses are currently being used as an interim vegetative cover for most sites. This coverage allows for required monitoring of the closure cap for settlement and maintenance activities. The purpose of this five year study was to evaluate plant materials for use on wastes sites after the post-closure care period that are quickly and easily established and economically maintained, retard water infiltration, provide maximum year-round evapotranspiration, are ecologically acceptable and do not harm the closure cap. The results of the study suggest that two species of bamboo (Phyllostachys (P.) bissetii and P. rubromarginata) can be utilized to provide long lived, low maintenance, climax vegetation for the waste sites after surveillance and maintenance requirements have ceased.
Date: January 22, 1993
Creator: Cook, J. R. & Salvo, S. K.
Object Type: Report
System: The UNT Digital Library
Final vegetative cover for closed waste sites. Revision 1 (open access)

Final vegetative cover for closed waste sites. Revision 1

Low-level, hazardous, and mixed waste disposal sites normally require some form of plant material to prevent erosion of the final closure cap. Waste disposal sites are closed and capped in a complex scientific manner to minimize water infiltration and percolation into and through the waste material. Turf type grasses are currently being used as an interim vegetative cover for most sites. This coverage allows for required monitoring of the closure cap for settlement and maintenance activities. The purpose of this five year study was to evaluate plant materials for use on wastes sites after the post-closure care period that are quickly and easily established and economically maintained, retard water infiltration, provide maximum year-round evapotranspiration, are ecologically acceptable and do not harm the closure cap. The results of the study suggest that two species of bamboo (Phyllostachys (P.) bissetii and P. rubromarginata) can be utilized to provide long lived, low maintenance, climax vegetation for the waste sites after surveillance and maintenance requirements have ceased.
Date: January 22, 1993
Creator: Cook, J. R. & Salvo, S. K.
Object Type: Report
System: The UNT Digital Library
Simulation of salt waste evaporation/crystallization (open access)

Simulation of salt waste evaporation/crystallization

The database of ProChem software has been enhanced to account for the formation of the mineral, Burkite which can form in alkaline tank wastes during evaporation. This mineral was not suspected until recent evaporation/crystallization studies suggested its presence. The enhanced data base will predict its occurrence and realm of existence. If salt cake temperatures drop below 30{degrees}C the Burkite phase is unstable toward hydrated sodium carbonates and sulfates. ProChem will not predict if this phase is more or less rapidly dissolved than its component salts. The enhanced database improves our ability to simulate waste chemistry.
Date: January 22, 1993
Creator: Orebaugh, E. G.
Object Type: Report
System: The UNT Digital Library
Simulation of salt waste evaporation/crystallization (open access)

Simulation of salt waste evaporation/crystallization

The database of ProChem software has been enhanced to account for the formation of the mineral, Burkite which can form in alkaline tank wastes during evaporation. This mineral was not suspected until recent evaporation/crystallization studies suggested its presence. The enhanced data base will predict its occurrence and realm of existence. If salt cake temperatures drop below 30[degrees]C the Burkite phase is unstable toward hydrated sodium carbonates and sulfates. ProChem will not predict if this phase is more or less rapidly dissolved than its component salts. The enhanced database improves our ability to simulate waste chemistry.
Date: January 22, 1993
Creator: Orebaugh, E. G.
Object Type: Report
System: The UNT Digital Library
Geographos asteroid flyby and autonomous navigation study (open access)

Geographos asteroid flyby and autonomous navigation study

Deep Space Program Science Experiment (DSPSE), also known as Clementine, is a collection of science experiments conducted in near-earth with the goal of demonstrating Strategic Defense Initiative Office (SDIO) developed technologies. The 785 lb (fully fueled) spacecraft will be launched into low Earth orbit in February 1994 together with a Star 37 solid kick motor and interstage. After orbit circulation using Clementine`s 110 lb Delta-V thruster, the Star 37 will execute a trans-lunar injection burn that will send the spacecraft toward lunar obit. The 110-lb will then be used in a sequence of burns to insert Clementine into a trimmed, polar orbit around the moon. After a two month moon mapping mission, Clementine will execute burns to leave lunar orbit, sling-shot around Earth, and flyby the moon on a 9.4 million km journey toward the asteroid Geographos. After about three months in transit, Clementine will attempt a flyby with a closest point of approach of 100 km from the asteroid on August 31, 1994. During its approach to Geographos, Clementine will be tracked by the Deep Space Network (DSN) and receive guidance updates. The last update and correction burn will occur about one day out of the flyby. Multiple experiments …
Date: February 22, 1993
Creator: Ng, L. C.; Pines, D. J.; Patz, B. J. & Perron, D. C.
Object Type: Article
System: The UNT Digital Library
Longitudinal beam dynamics for heavy ion fusion using WARPrz (open access)

Longitudinal beam dynamics for heavy ion fusion using WARPrz

WARPrz is a 2.5 dimensional, cylindrically symmetric, electrostatic, particle-in-cell code. It is part of the WARP family of codes which has been developed to study heavy ion fusion driver issues. WARPrz is being used to study the longitudinal dynamics of heavy ion beams including a longitudinal instability that is driven by the impedance of the LINAC accelerating modules. This instability is of concern because it can enhance longitudinal momentum spread; chromatic abhoration in the lens system restricts the amount of momentum spread allowed in the beam in the final focusing system. The impedance of the modules is modeled by a continuum of resistors and capacitors in parallel in WARPrz. We discuss simulations of this instability including the effect of finite temperature and reflection of perturbations off the beam ends. We also discuss intermittency of axial confining fields (``ears`` fields) as a seed for this instability.
Date: February 22, 1993
Creator: Callahan, D. A.; Langdon, A. B.; Friedman, A. & Haber, I.
Object Type: Article
System: The UNT Digital Library
Model building, control and optimization of large scale systems (open access)

Model building, control and optimization of large scale systems

This report covers the research progress made during the calendar year 1992. The new results obtained during this period are described, keyed to the references listed on the last two pages of this report.
Date: February 22, 1993
Creator: Basar, T.
Object Type: Report
System: The UNT Digital Library
Model building, control and optimization of large scale systems. Progress report, January 1992--January 1993 (open access)

Model building, control and optimization of large scale systems. Progress report, January 1992--January 1993

This report covers the research progress made during the calendar year 1992. The new results obtained during this period are described, keyed to the references listed on the last two pages of this report.
Date: February 22, 1993
Creator: Basar, T.
Object Type: Report
System: The UNT Digital Library
Overview of WARP, a particle code for Heavy Ion Fusion (open access)

Overview of WARP, a particle code for Heavy Ion Fusion

The beams in a Heavy Ion beam driven inertial Fusion (HIF) accelerator must be focused onto small spots at the fusion target, and so preservation of beam quality is crucial. The nonlinear self-fields of these space-charge-dominated beams can lead to emittance growth; thus a self-consistent field description is necessary. We have developed a multi-dimensional discrete-particle simulation code, WARP, and are using it to study the behavior of HIF beams. The code`s 3d package combines features of an accelerator code and a particle-in-cell plasma simulation, and can efficiently track beams through many lattice elements and around bends. We have used the code to understand the physics of aggressive drift-compression in the MBE-4 experiment at Lawrence Berkeley Laboratory (LBL). We have applied it to LBL`s planned ILSE experiments, to various ``recirculator`` configurations, and to the study of equilibria and equilibration processes. Applications of the 3d package to ESQ injectors, and of the r, z package to longitudinal stability in driver beams, are discussed in related papers.
Date: February 22, 1993
Creator: Friedman, A.; Grote, D. P.; Callahan, D. A.; Langdon, A. B. & Haber, I.
Object Type: Article
System: The UNT Digital Library
PIC space-charge emission with finite {Delta}t and {Delta}z (open access)

PIC space-charge emission with finite {Delta}t and {Delta}z

A new algorithm for space charge emission has been developed to provide the correct (to a few percent) Child-Langmuir steady-state current limits as the number of mesh points in the voltage gap drops to O(10). Further, the transient behavior of such flows compares well with idealized, analytic cases, lending confidence as we extend these algorithms into full RZ geometry with curved emitting surfaces to investigate transient characteristics of realistic injector designs.
Date: February 22, 1993
Creator: Hewett, D. W. & Chen, Yu-Jiuan
Object Type: Article
System: The UNT Digital Library
Precision of source response inside dimpled HAD brass tubes (open access)

Precision of source response inside dimpled HAD brass tubes

We have measured the variation in response of the {sup 137}CS source as positioned in 10 samples of the brass source tubes, dimpled at {plus_minus}5 cm from the center of a scintillator tile. We find an RMS in the signals of 2.5%.
Date: February 22, 1993
Creator: Jankowski, D. J. & Stanek, R.
Object Type: Report
System: The UNT Digital Library
Precision of source response inside dimpled HAD brass tubes (open access)

Precision of source response inside dimpled HAD brass tubes

We have measured the variation in response of the [sup 137]CS source as positioned in 10 samples of the brass source tubes, dimpled at [plus minus]5 cm from the center of a scintillator tile. We find an RMS in the signals of 2.5%.
Date: February 22, 1993
Creator: Jankowski, D. J. & Stanek, R.
Object Type: Report
System: The UNT Digital Library
Microcomputer resource inspection/self-inspection program (open access)

Microcomputer resource inspection/self-inspection program

A Computer Security Program is more than just a concept. It is real action by real people. Under direction of DOE Orders, Martin Marietta Energy systems, Inc., personnel have developed a Microcomputer Security Program that is both effective and sensible. this program works because those involved have a sincere desire to protect DOE information and assets. The Oak Ridge Y-12 Plant is located in Oak Ridge, Tennessee. This facility covers 2.25 miles in the Bear Creek area and consists of approximately 500 buildings, which are located in Protected, Exclusion, and Property Protection Areas. There are some 50 different Energy Systems organizations that comprise the Y-12 Plant. There are approximately 700 classified microcomputers and approximately 5,300 unclassified microcomputers at the site. These resources are used for many different functions including: word processing, computer Aided Design operations, database management, servers for local area networks, and terminal emulators. Most microcomputers are used in a stand-alone mode of operation.
Date: March 22, 1993
Creator: Hockett, E. L. Jr. & Marlow, K. A.
Object Type: Article
System: The UNT Digital Library
Road Transportable Analytical Laboratory (RTAL) system. Quarterly technical report, December 1992--February 1993 (open access)

Road Transportable Analytical Laboratory (RTAL) system. Quarterly technical report, December 1992--February 1993

The goal of this contractual effort is the development and demonstration of a Road Transportable Analytical Laboratory (RTAL) system to meet the unique needs of the Department of Energy (DOE) for rapid, accurate analysis of a wide variety of hazardous and radioactive contaminants in soil, groundwater, and surface waters. This laboratory system will be designed to provide the field and laboratory analytical equipment necessary to detect and quantify radionuclides, organics, heavy metals and other inorganics, and explosive materials. The planned laboratory system will consist of a set of individual laboratory modules deployable independently or as an interconnected group to meet each DOE site`s specific needs.
Date: March 22, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
FORTE log periodic antenna. Phase 1, Final report (open access)

FORTE log periodic antenna. Phase 1, Final report

This report summarizes the results of ABLE`s design study of the FORTE deployable log periodic antenna. The resulting Baseline Design of the antenna is the basis for ABLE`s proposal for Phase II of this program. ABLE`s approach to meeting the requirements is to use a coilable ABLE mast as the deployable structure ``backbone`` of the antenna and to use deployable tubes for. the log periodic dipole elements of the antenna. This general approach was adopted at the outset of the Phase I Design Study. The remainder of the study was devoted to detailed design and analysis to properly size these types of mast and antenna elements and to design their deployment mechanisms. Demonstration models of the mast and antenna element deployer were fabricated as part of Phase I study. The study showed that ABLE`s design approach is feasible and can meet all the specified design requirements except the mass limit of 13.5 kg. Results of the design and analysis studies are summarized in this report. The mast and dipole element deployer are to be demonstrated to LANL personnel at the conclusion of this Phase I study.
Date: April 22, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
High efficiency shale oil recovery (open access)

High efficiency shale oil recovery

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 on a small 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. Although an oil shale batch sample is sealed in the batch kiln from the start until the end of the run, the process conditions for the batch are the same as the conditions that an element of oil shale would encounter in a continuous process kiln. Similar chemical and physical conditions (heating, mixing, pyrolysis, oxidation) exist in both systems.The two most important data objectives in this phase of the project are to demonstrate (1) that the heat recovery projected for this project is reasonable and (2) that an oil shale kiln will run well and not plug up due to sticking and agglomeration. The following was completed this quarter. (1) Twelve pyrolysis runs were made on five different oil shales. …
Date: April 22, 1993
Creator: Adams, D.C.
Object Type: Report
System: The UNT Digital Library
High efficiency shale oil recovery. Fifth quarterly report, January 1, 1993--March 31, 1993 (open access)

High efficiency shale oil recovery. Fifth quarterly report, January 1, 1993--March 31, 1993

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 on a small 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. Although an oil shale batch sample is sealed in the batch kiln from the start until the end of the run, the process conditions for the batch are the same as the conditions that an element of oil shale would encounter in a continuous process kiln. Similar chemical and physical conditions (heating, mixing, pyrolysis, oxidation) exist in both systems.The two most important data objectives in this phase of the project are to demonstrate (1) that the heat recovery projected for this project is reasonable and (2) that an oil shale kiln will run well and not plug up due to sticking and agglomeration. The following was completed this quarter. (1) Twelve pyrolysis runs were made on five different oil shales. …
Date: April 22, 1993
Creator: Adams, D. C.
Object Type: Report
System: The UNT Digital Library
High SO[sub 2] removal efficiency testing (open access)

High SO[sub 2] removal efficiency testing

This document provides a discussion of the technical progress on DOE-PETC Project Number AC22-92PC91338, High Efficiency SO[sub 2] Removal Testing,'' for the time period from January 1 through March 31, 1993. The project involves testing at full-scale utility flue gas desulfurization (FGD) systems to evaluate low capital cost upgrades that may allow these systems to achieve up to 98% SO[sub 2] removal efficiency. The options to be evaluated primarily involve the addition of organic acid buffers to the FGD systems. The base'' project involves testing at one site, Tampa Electric Company's Big Bend Station. Up to five optional sites may be added to the program at the discretion of DOE-PETC. By March 31, 1993, four of those five options had been exercised. The options include testing at Hoosier Energy's Merom Station (Option I), Southwestern Electric Power Company's (SWEPCo) Pirkey Station (Option II), PSI Energy's Gibson Station (Option III), and Duquesne Light's Elrama Station (Option IV). The remainder of this document is divided into three sections. Section 2, Project Summary, provides a brief overview of the technical efforts on this project during the quarter. Section 3, Results, summarizes the outcome of those technical efforts. Results for the Base Program and for …
Date: April 22, 1993
Creator: Blythe, G.
Object Type: Report
System: The UNT Digital Library
High SO{sub 2} removal efficiency testing. Technical progress report, [January 1--March 31, 1993] (open access)

High SO{sub 2} removal efficiency testing. Technical progress report, [January 1--March 31, 1993]

This document provides a discussion of the technical progress on DOE-PETC Project Number AC22-92PC91338, ``High Efficiency SO{sub 2} Removal Testing,`` for the time period from January 1 through March 31, 1993. The project involves testing at full-scale utility flue gas desulfurization (FGD) systems to evaluate low capital cost upgrades that may allow these systems to achieve up to 98% SO{sub 2} removal efficiency. The options to be evaluated primarily involve the addition of organic acid buffers to the FGD systems. The ``base`` project involves testing at one site, Tampa Electric Company`s Big Bend Station. Up to five optional sites may be added to the program at the discretion of DOE-PETC. By March 31, 1993, four of those five options had been exercised. The options include testing at Hoosier Energy`s Merom Station (Option I), Southwestern Electric Power Company`s (SWEPCo) Pirkey Station (Option II), PSI Energy`s Gibson Station (Option III), and Duquesne Light`s Elrama Station (Option IV). The remainder of this document is divided into three sections. Section 2, Project Summary, provides a brief overview of the technical efforts on this project during the quarter. Section 3, Results, summarizes the outcome of those technical efforts. Results for the Base Program and for …
Date: April 22, 1993
Creator: Blythe, G.
Object Type: Report
System: The UNT Digital Library
Positron annihilation study of Sr Doping in La{sub 2-x}Sr{sub x}CuO{sub 4} (open access)

Positron annihilation study of Sr Doping in La{sub 2-x}Sr{sub x}CuO{sub 4}

We present a combined experimental and threshold study of effects of Sr doping on electronic structure of La{sub 2-x}Sr{sub x}CuO{sub 4}. Electron-positron momentum distributions have been measured to high statistical precision (> 4 {times} 10{sup 8} counts) at room temperature for samples with Sr concentrations of x = 0.0, 0.1, 0.13 and 0.2. Analysis of all four spectra reveal strong features due to electron-positron wavefunction overlap, in quantitative agreement with theoretical calculations. The Sr doped samples show discontinuities consistent with presence of a Fermi surface. The form and position of these features are in general agreement with the predictions of band theory. Correspondence between theory and experiment, as well as some differences, are revealed by a detailed study of the changes in electron-position momentum density with increasing Sr doping.
Date: April 22, 1993
Creator: Sterne, P. A.; Howell, R. H.; Fluss, M. J.; Kaiser, J. H.; Kitazawa, K. & Kojima, H.
Object Type: Article
System: The UNT Digital Library