BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS (open access)

BOILER MATERIALS FOR ULTRASUPERCRITICAL COAL POWER PLANTS

The U.S. Department of Energy (DOE) and the Ohio Coal Development Office (OCDO) have recently initiated a project aimed at identifying, evaluating, and qualifying the materials needed for the construction of the critical components of coal-fired boilers capable of operating at much higher efficiencies than current generation of supercritical plants. This increased efficiency is expected to be achieved principally through the use of ultrasupercritical steam conditions (USC). The project goal initially was to assess/develop materials technology that will enable achieving turbine throttle steam conditions of 760 C (1400 F)/35 MPa (5000 psi), although this goal for the main steam temperature had to be revised down to 732 C (1350 F), based on a preliminary assessment of material capabilities. The project is intended to build further upon the alloy development and evaluation programs that have been carried out in Europe and Japan. Those programs have identified ferritic steels capable of meeting the strength requirements of USC plants up to approximately 620 C (1150 F) and nickel-based alloys suitable up to 700 C (1300 F). In this project, the maximum temperature capabilities of these and other available high-temperature alloys are being assessed to provide a basis for materials selection and application under …
Date: July 30, 2004
Creator: Viswanathan, R.; Coleman, K.; Shingledecker, J.; Sarver, J.; Stanko, G.; Mohn, W. et al.
Object Type: Report
System: The UNT Digital Library
Bonneville Power Administration: Better Management of BPA's Obligation to Provide Power Is Needed to Control Future Costs (open access)

Bonneville Power Administration: Better Management of BPA's Obligation to Provide Power Is Needed to Control Future Costs

A letter report issued by the Government Accountability Office with an abstract that begins "The Bonneville Power Administration (BPA) has experienced significant financial problems in recent years. BPA's cash reserves at the end of fiscal year 2002 had fallen to $188 million, and BPA estimated in February 2003 that it had a 74 percent chance of missing its Treasury debt payment that year. While BPA's finances have recently improved, and the agency made its Treasury payment in 2003, BPA's financial condition is still far from robust. In this context, GAO was asked to report on (1) the advantages and disadvantages BPA faces in marketing electric power in a more competitive environment, (2) the major causes of BPA's recent cost increases, and (3) the extent to which BPA is taking actions to control its costs."
Date: July 9, 2004
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Border Business Indicators, Volume 28, Number 7, July 2004 (open access)

Border Business Indicators, Volume 28, Number 7, July 2004

Monthly publication documenting statistics related to economic information in the Mexico-Texas border areas including types of border crossings, employment, customs revenues, and other related data.
Date: July 2004
Creator: Texas Center for Border Economic and Enterprise Development
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History
Border Security: Additional Actions Needed to Eliminate Weaknesses in the Visa Revocation Process (open access)

Border Security: Additional Actions Needed to Eliminate Weaknesses in the Visa Revocation Process

A letter report issued by the Government Accountability Office with an abstract that begins "The National Strategy for Homeland Security calls for preventing foreign terrorists from entering our country and using all legal means to identify; halt; and where appropriate, prosecute or bring immigration or other civil charges against terrorists in the United States. GAO reported in June 2003 that the visa revocation process needed to be strengthened as an antiterrorism tool and recommended that the Department of Homeland Security (DHS), in conjunction with the Departments of State (State) and Justice, develop specific policies and procedures to ensure that appropriate agencies are notified of revocations based on terrorism grounds and take proper actions. GAO examined whether weaknesses in the visa revocation process identified in its June 2003 report were addressed."
Date: July 13, 2004
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Border Security: Additional Actions Needed to Eliminate Weaknesses in the Visa Revocation Process (open access)

Border Security: Additional Actions Needed to Eliminate Weaknesses in the Visa Revocation Process

Testimony issued by the Government Accountability Office with an abstract that begins "The National Strategy for Homeland Security calls for preventing foreign terrorists from entering our country and using all legal means to identify; halt; and where appropriate, prosecute or bring immigration or other civil charges against terrorists in the United States. GAO reported in June 2003 that the visa revocation process needed to be strengthened as an antiterrorism tool and recommended that the Department of Homeland Security (DHS), in conjunction with the Departments of State (State) and Justice, develop specific policies and procedures to ensure that appropriate agencies are notified of revocations based on terrorism grounds and take proper actions. GAO examined whether weaknesses in the visa revocation process identified in our June 2003 report were addressed."
Date: July 13, 2004
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Bounding Peak Ground Velocities for Seismic Events at Yucca Mountain, Nevada (open access)

Bounding Peak Ground Velocities for Seismic Events at Yucca Mountain, Nevada

Earthquake ground motions have been assessed using a probabilistic seismic hazard analysis (PSHA) of the proposed repository for spent nuclear fuel and high-level radioactive wastes at Yucca Mountain, Nevada. To meet the applicable regulations, consideration must be given to ground motions that have probabilities of exceedance as low as 10{sup -8}/yr. In the PSHA, aleatory variability in ground motion attenuation relations is characterized by unbounded lognormal distributions. At extremely low annual probability levels, the tails of these distributions, along with large assessed epistemic uncertainties in ground motions from large, close earthquakes, result in upper-percentile and mean ground motions that are extremely high and probably unphysical. To address this issue, we evaluated site-specific geologic evidence with respect to an upper bound on peak ground velocity (PGV), the ground motion measure that is correlated with damage to underground repository systems. Ground-motion amplitudes are limited by the strength of the materials through which they propagate. At high enough levels of seismic shaking, the rocks at the waste-emplacement level, particularly the lithophysal tuffs, will fracture and fail. A key finding of geologic relations from underground explorations and rock-mechanics modeling is the absence of mechanical damage of the type expected from seismic shaking in the …
Date: July 13, 2004
Creator: King, J.; Coppersmith, K. & Quittmeyer, R.
Object Type: Report
System: The UNT Digital Library
A Brief Case for the MICE Experiment (open access)

A Brief Case for the MICE Experiment

This is a brief prepared for the NSF management to explain the particle and accelerator physics motivations for MICE.
Date: July 22, 2004
Creator: Blondel, Alain; Kaplan, Daniel; Long, Kenneth & Zisman, Michael S.
Object Type: Report
System: The UNT Digital Library
Brownfields and Superfund Issues in the 108th Congress (open access)

Brownfields and Superfund Issues in the 108th Congress

This report is the superfund program for cleaning up the nation's worst hazardous waste sites that was created by the comprehensive environmental Response, Compensation, and Liability Act of 1980, or CERLA.
Date: July 21, 2004
Creator: Reisch, Mark
Object Type: Report
System: The UNT Digital Library
Builder System Performance Package Targeting 30% -- 40% Savings in Space Conditioning Energy Use: Period of Performance; December 2002 to December 2003 (open access)

Builder System Performance Package Targeting 30% -- 40% Savings in Space Conditioning Energy Use: Period of Performance; December 2002 to December 2003

The Consortium for Advanced Residential Building (CARB), one of the Building America teams, describes recommended best practices to achieve 30% - 40% energy savings without compromising health or safety in houses built in cold climates, hot-humid climates, and hot-dry climates.
Date: July 1, 2004
Creator: unknown
Object Type: Report
System: The UNT Digital Library
BUNCH PATTERNS AND PRESSURE RISE IN RHIC. (open access)

BUNCH PATTERNS AND PRESSURE RISE IN RHIC.

The RHIC luminosity is limited by pressure rises with high intensity beams. At injection and store, the dominating cause for the pressure rise was shown to be electron clouds. We discuss bunch distributions along the circumference that minimize the electron cloud effect in RHIC. Simulation results are compared with operational observations.
Date: July 5, 2004
Creator: FISCHER,W. IRISO-ARIZ,U.
Object Type: Article
System: The UNT Digital Library
Business Management for Biodiesel Producers: August 2002--January 2004 (open access)

Business Management for Biodiesel Producers: August 2002--January 2004

The material in this book is intended to provide the reader with information about the biodiesel and liquid fuels industry, biodiesel start-up issues, legal and regulatory issues, and operational concerns.
Date: July 1, 2004
Creator: Van Gerpen, J.
Object Type: Report
System: The UNT Digital Library
Calcium Carbonate Production by Coccolithophorid Algae in Long Term, Carbon Dioxide Sequestration (open access)

Calcium Carbonate Production by Coccolithophorid Algae in Long Term, Carbon Dioxide Sequestration

The principle research research effort for Year 1 of the project in data compilation and the determination of the tectonic and depositional histories of the North Lousiana Salt Basin..
Date: July 30, 2004
Creator: Fabry, V.J.
Object Type: Report
System: The UNT Digital Library
CALFED Bay-Delta Program: Overview of Institutional and Water Use Issues (open access)

CALFED Bay-Delta Program: Overview of Institutional and Water Use Issues

The California Bay-Delta Program (CALFED) was initiated in 1995 to resolve water resources conflicts in the Sacramento/San Joaquin Rivers Delta and San Francisco Bay (Bay-Delta) in California. The program planning effort focused on developing a plan to address three main problem areas in the Bay-Delta: ecosystem health, water quality, and water supply reliability. CALFED was authorized to receive federal funding from FY1998 to FY2000, and is now being considered for reauthorization.
Date: July 26, 2004
Creator: Sheikh, Pervaze A. & Cody, Betsy A.
Object Type: Report
System: The UNT Digital Library
California Energy Commission Public Interest EnergyResearch/Energy System Integration -- Transmission-Planning Research&Development Scoping Project (open access)

California Energy Commission Public Interest EnergyResearch/Energy System Integration -- Transmission-Planning Research&Development Scoping Project

The objective of this Public Interest Energy Research (PIER)scoping project is to identify options for public-interest research and development (R&D) to improve transmission-planning tools, techniques, and methods. The information presented was gathered through a review of current California utility, California Independent System Operator (ISO), and related western states electricity transmission-planning activities and emerging needs. This report presents the project teams findings organized under six topic areas and identifies 17 distinct R&D activities to improve transmission-planning in California and the West. The findings in this report are intended for use, along with other materials, by PIER staff, to facilitate discussions with stakeholders that will ultimately lead to development of a portfolio of transmission-planning R&D activities for the PIER program.
Date: July 1, 2004
Creator: Eto, Joseph H.; Lesieutre, Bernard & Widergren, Steven
Object Type: Report
System: The UNT Digital Library
Campaign Finance: Constitutional and Legal Issues of Soft Money (open access)

Campaign Finance: Constitutional and Legal Issues of Soft Money

Prior to enactment of the Bipartisan Campaign Reform Act of 2002 (BCRA), P.L. 107-155, the term “soft money” generally referred to unregulated funds, perceived as resulting from loopholes in the Federal Election Campaign Act (FECA), 2 U.S.C. §§ 431 et seq. Generally, the intent of BCRA, (effective Nov. 6, 2002), which amends FECA, is to restrict the raising and spending of soft money. This Issue Brief discusses constitutional and legal issues surrounding two major types of soft money that BCRA regulates: political party soft money and soft money used for issue advocacy communications. Corporate and labor union soft money, which FECA exempts from regulation and is not addressed by BCRA, is also discussed.
Date: July 21, 2004
Creator: Whitaker, L. Paige
Object Type: Report
System: The UNT Digital Library
Campaign Financing (open access)

Campaign Financing

This is one report in the series of reports that discuss the campaign finance practices and related issues. Concerns over financing federal elections have become a seemingly perennial aspect of our political system, centered on the enduring issues of high campaign costs and reliance on interest groups for needed campaign funds. The report talks about the today’s paramount issues such as perceived loopholes in current law and the longstanding issues: overall costs, funding sources, and competition.
Date: July 16, 2004
Creator: Cantor, Joseph E.
Object Type: Report
System: The UNT Digital Library
Carbon Dioxide Capture From Flue Gas Using Dry Regenerable Sorbents Quarterly Technical Progress Report: April-June 2004 (open access)

Carbon Dioxide Capture From Flue Gas Using Dry Regenerable Sorbents Quarterly Technical Progress Report: April-June 2004

This report describes research conducted between April 1, 2004 and June 30, 2004 on the preparation and use of dry regenerable sorbents for removal of carbon dioxide from flue gas. Support materials and supported sorbents were prepared by spray drying. Sorbents consisting of 20 to 50% sodium carbonate on a ceramic support were prepared by spray drying in batches of approximately 300 grams. The supported sorbents exhibited greater carbon dioxide capture rates than unsupported calcined sodium bicarbonate in laboratory tests. Preliminary process design and cost estimation for a retrofit application suggested that costs of a dry regenerable sodium carbonate-based process could be lower than those of a monoethanolamine absorption system. In both cases, the greatest part of the process costs come from power plant output reductions due to parasitic consumption of steam for recovery of carbon dioxide from the capture medium.
Date: July 1, 2004
Creator: Green, David A.; Turk, Brian S.; Portzer, Jeffrey W.; Gupta, Raghubir P.; McMichael, William J. & Nelson, Thomas
Object Type: Report
System: The UNT Digital Library
Carbon Sequestration in Reclaimed Mined Soils of Ohio (open access)

Carbon Sequestration in Reclaimed Mined Soils of Ohio

This research project is aimed at assessing the soil organic carbon (SOC) sequestration potential of reclaimed minesoils (RMS). The experimental sites, owned and maintained by the American Electrical Power, are located in Guernsey, Morgan, Noble, and Muskingum Counties of Ohio. These sites, characterized by age chronosequences, were reclaimed with and without topsoil application and are under continuous grass or forest cover. During this quarter, bulk and core soil samples were collected from all 13 experimental sites for 0-15 cm, 15-30 cm, and 30-50 cm depths. In addition, 54 experimental plots (4 x 4 m) were established at three separate locations on reclaimed minesites to assess the influence of compost application on SOC during project period 2. This report presents the results from two sites reclaimed during 1978. The first site is under grass and the other under forest cover. The soil bulk density ({rho}{sub b}), SOC, total nitrogen (TN) concentrations and stocks were determined for these two sites on a 20 x 20 m grid. The preliminary analysis showed that the {rho}{sub b} ranged from 0.88 Mg m{sup -3} to 1.16 Mg m{sup -3} for 0-15 cm, 0.91 Mg m{sup -3} to 1.32 Mg m{sup -3} for 15-30 cm, and …
Date: July 1, 2004
Creator: Shukla, M. K. & Lal, R.
Object Type: Report
System: The UNT Digital Library
Carriers of the astronomical 2175 ? extinction feature (open access)

Carriers of the astronomical 2175 ? extinction feature

The 2175 {angstrom} extinction feature is by far the strongest spectral signature of interstellar dust observed by astronomers. Forty years after its discovery the origin of the feature and the nature of the carrier remain controversial. The feature is enigmatic because although its central wavelength is almost invariant its bandwidth varies strongly from one sightline to another, suggesting multiple carriers or a single carrier with variable properties. Using a monochromated transmission electron microscope and valence electron energy-loss spectroscopy we have detected a 5.7 eV (2175 {angstrom}) feature in submicrometer-sized interstellar grains within interplanetary dust particles (IDPs) collected in the stratosphere. The carriers are organic carbon and amorphous silicates that are abundant and closely associated with one another both in IDPs and in the interstellar medium. Multiple carriers rather than a single carrier may explain the invariant central wavelength and variable bandwidth of the astronomical 2175 {angstrom} feature.
Date: July 20, 2004
Creator: Bradley, J.; Dai, Z.; Ernie, R.; Browning, N.; Graham, G.; Weber, P. et al.
Object Type: Article
System: The UNT Digital Library
Catalyst Additives to Enhance Mercury Oxidation and Capture Quarterly Report: March - June 2004 (open access)

Catalyst Additives to Enhance Mercury Oxidation and Capture Quarterly Report: March - June 2004

None
Date: July 2004
Creator: Gale, Thomas K.
Object Type: Report
System: The UNT Digital Library
The CDFII Silicon Detector (open access)

The CDFII Silicon Detector

The CDFII silicon detector consists of 8 layers of double-sided silicon micro-strip sensors totaling 722,432 readout channels, making it one of the largest silicon detectors in present use by an HEP experiment. After two years of data taking, we report on our experience operating the complex device. The performance of the CDFII silicon detector is presented and its impact on physics analyses is discussed. We have already observed measurable effects from radiation damage. These results and their impact on the expected lifetime of the detector are briefly reviewed.
Date: July 23, 2004
Creator: Thom, Julia
Object Type: Article
System: The UNT Digital Library
Cellulose Synthesis in Agrobacterium tumefaciens (open access)

Cellulose Synthesis in Agrobacterium tumefaciens

We have cloned the celC gene and its homologue from E. coli, yhjM, in an expression vector and expressed the both genes in E. coli; we have determined that the YhjM protein is able to complement in vitro cellulose synthesis by extracts of A. tumefaciens celC mutants, we have purified the YhjM protein product and are currently examining its enzymatic activity; we have examined whole cell extracts of CelC and various other cellulose mutants and wild type bacteria for the presence of cellulose oligomers and cellulose; we have examined the ability of extracts of wild type and cellulose mutants including CelC to incorporate UDP-14C-glucose into cellulose and into water-soluble, ethanol-insoluble oligosaccharides; we have made mutants which synthesize greater amounts of cellulose than the wild type; and we have examined the role of cellulose in the formation of biofilms by A. tumefaciens. In addition we have examined the ability of a putative cellulose synthase gene from the tunicate Ciona savignyi to complement an A. tumefaciens celA mutant. The greatest difference between our knowledge of bacterial cellulose synthesis when we started this project and current knowledge is that in 1999 when we wrote the original grant very few bacteria were known to …
Date: July 31, 2004
Creator: White, Alan R. & Matthysse, Ann G.
Object Type: Report
System: The UNT Digital Library
Certification of Completion of Level-2 Milestone 405: Deploy Next-Generation Data Management and Analysis Environment (open access)

Certification of Completion of Level-2 Milestone 405: Deploy Next-Generation Data Management and Analysis Environment

This summary report describes data management and visualization activities in the Advanced Simulation and Computing (ASC) program at Lawrence Livermore National Laboratory (LLNL). The report covers the period from approximately October 2003 to June 2004 and describes activities within the Visual Interactive Environment for Weapons Simulation (VIEWS) ASC program element. This report and the references herein are intended to document the completion of the following Level 2 Milestone from the ASC FY04-05 Implementation Plan, due at the end of Quarter 3 in FY04:
Date: July 28, 2004
Creator: Long, J W; Frank, R J; Brugger, E & Louis, S
Object Type: Report
System: The UNT Digital Library
Characterization of Defense Waste Processing Facility (DWPF) Glass and Deposit Samples from Melter No.2 (open access)

Characterization of Defense Waste Processing Facility (DWPF) Glass and Deposit Samples from Melter No.2

The Defense Waste Processing Facility (DWPF) Engineering requested characterization of three glass samples that were taken from Melter number 2 after the waste loading had been increased, e.g. after the new quasicrystalline liquidus model had been implemented and after DWPF switched from processing with Frit 200 to Frit 320. These samples were taken after DWPF observed very rapid buildup of deposits in the upper pour spout bore and on the pour spout insert while processing the high waste loading (approximate 38 wt percent feedstock). Rapid deposition in these locations had not occurred prior to this and, in turn, stopped after waste loading decreased. These samples were evaluated at SRTC using various analytical techniques for potential impacts on pouring problems recently experienced by the DWPF.
Date: July 8, 2004
Creator: Jantzen, Carol M.; Cozzi, A. D. & Bibler, N. E.
Object Type: Report
System: The UNT Digital Library