Resource Type

Characterization of Oxy-combustion Impacts in Existing Coal-fired Boilers (open access)

Characterization of Oxy-combustion Impacts in Existing Coal-fired Boilers

Reaction Engineering International (REI) managed a team of experts from University of Utah, Siemens Energy, Praxair, Vattenfall AB, Sandia National Laboratories, Brigham Young University (BYU) and Corrosion Management Ltd. to perform multi-scale experiments, coupled with mechanism development, process modeling and CFD modeling, for both applied and fundamental investigations. The primary objective of this program was to acquire data and develop tools to characterize and predict impacts of CO{sub 2} flue gas recycle and burner feed design on flame characteristics (burnout, NO{sub x}, SO{sub x}, mercury and fine particle emissions, heat transfer) and operational concerns (fouling, slagging and corrosion) inherent in the retrofit of existing coal-fired boilers for oxy-coal combustion. Experimental work was conducted at Sandia National Laboratories’ Entrained Flow Reactor, the University of Utah Industrial Combustion Research Facility, and Brigham Young University. Process modeling and computational fluid dynamics (CFD) modeling was performed at REI. Successful completion of the project objectives resulted in the following key deliverables: 1) Multi-scale test data from 0.1 kW bench-scale, 100 kW and 200 kW laboratory-scale, and 1 MW semi-industrial scale combustors that describe differences in flame characteristics, fouling, slagging and corrosion for coal combustion under air-firing and oxygen-firing conditions, including sensitivity to oxy-burner design and …
Date: September 30, 2013
Creator: Adams, Bradley; Davis, Kevin; Senior, Constance; Shim, Hong Shim; Otten, Brydger; Fry, Andrew et al.
System: The UNT Digital Library
Advanced CO{sub 2} Capture Technology for Low Rank Coal IGCC System (open access)

Advanced CO{sub 2} Capture Technology for Low Rank Coal IGCC System

The overall objective of the project is to demonstrate the technical and economic viability of a new Integrated Gasification Combined Cycle (IGCC) power plant designed to efficiently process low rank coals. The plant uses an integrated CO{sub 2} scrubber/Water Gas Shift (WGS) catalyst to capture over90 percent capture of the CO{sub 2} emissions, while providing a significantly lower cost of electricity (COE) than a similar plant with conventional cold gas cleanup system based on SelexolTM technology and 90 percent carbon capture. TDA’s system uses a high temperature physical adsorbent capable of removing CO{sub 2} above the dew point of the synthesis gas and a commercial WGS catalyst that can effectively convert CO in The overall objective of the project is to demonstrate the technical and economic viability of a new Integrated Gasification Combined Cycle (IGCC) power plant designed to efficiently process low rank coals. The plant uses an integrated CO{sub 2} scrubber/Water Gas Shift (WGS) catalyst to capture over90 percent capture of the CO{sub 2} emissions, while providing a significantly lower cost of electricity (COE) than a similar plant with conventional cold gas cleanup system based on SelexolTM technology and 90 percent carbon capture. TDA’s system uses a high temperature …
Date: September 30, 2013
Creator: Alptekin, Gokhan
System: The UNT Digital Library
Impact of Contaminants Present in Coal-Biomass Derived Synthesis Gas on Water-gas Shift and Fischer-Tropsch Synthesis Catalysts (open access)

Impact of Contaminants Present in Coal-Biomass Derived Synthesis Gas on Water-gas Shift and Fischer-Tropsch Synthesis Catalysts

Co-gasification of biomass and coal in large-scale, Integrated Gasification Combined Cycle (IGCC) plants increases the efficiency and reduces the environmental impact of making synthesis gas ("syngas") that can be used in Coal-Biomass-to-Liquids (CBTL) processes for producing transportation fuels. However, the water-gas shift (WGS) and Fischer-Tropsch synthesis (FTS) catalysts used in these processes may be poisoned by multiple contaminants found in coal-biomass derived syngas; sulfur species, trace toxic metals, halides, nitrogen species, the vapors of alkali metals and their salts (e.g., KCl and NaCl), ammonia, and phosphorous. Thus, it is essential to develop a fundamental understanding of poisoning/inhibition mechanisms before investing in the development of any costly mitigation technologies. We therefore investigated the impact of potential contaminants (H{sub 2}S, NH{sub 3}, HCN, AsH{sub 3}, PH{sub 3}, HCl, NaCl, KCl, AS{sub 3}, NH{sub 4}NO{sub 3}, NH{sub 4}OH, KNO{sub 3}, HBr, HF, and HNO{sub 3}) on the performance and lifetime of commercially available and generic (prepared in-house) WGS and FT catalysts; ferrochrome-based high-temperature WGS catalyst (HT-WGS, Shiftmax 120™, Süd-Chemie), low-temperature Cu/ZnO-based WGS catalyst (LT-WGS, Shiftmax 230™, Süd-Chemie), and iron- and cobalt-based Fischer-Trospch synthesis catalysts (Fe-FT & Co-FT, UK-CAER). In this project, TDA Research, Inc. collaborated with a team at the University of Kentucky …
Date: September 30, 2012
Creator: Alptekin, Gokhan
System: The UNT Digital Library
A Low Cost, High Capacity Regenerable Sorbent for Pre-combustion CO{sub 2} Capture (open access)

A Low Cost, High Capacity Regenerable Sorbent for Pre-combustion CO{sub 2} Capture

The overall objective of the proposed research is to develop a low cost, high capacity CO{sub 2} sorbent and demonstrate its technical and economic viability for pre-combustion CO{sub 2} capture. The specific objectives supporting our research plan were to optimize the chemical structure and physical properties of the sorbent, scale-up its production using high throughput manufacturing equipment and bulk raw materials and then evaluate its performance, first in bench-scale experiments and then in slipstream tests using actual coal-derived synthesis gas. One of the objectives of the laboratory-scale evaluations was to demonstrate the life and durability of the sorbent for over 10,000 cycles and to assess the impact of contaminants (such as sulfur) on its performance. In the field tests, our objective was to demonstrate the operation of the sorbent using actual coal-derived synthesis gas streams generated by air-blown and oxygen-blown commercial and pilot-scale coal gasifiers (the CO{sub 2} partial pressure in these gas streams is significantly different, which directly impacts the operating conditions hence the performance of the sorbent). To support the field demonstration work, TDA collaborated with Phillips 66 and Southern Company to carry out two separate field tests using actual coal-derived synthesis gas at the Wabash River IGCC …
Date: September 30, 2012
Creator: Alptekin, Gokhan
System: The UNT Digital Library
Envisioning an Ecologically Sustainable Campus At New England College (open access)

Envisioning an Ecologically Sustainable Campus At New England College

Appropriation funding for our project Ecologically Sustainable Campus - New England College (NH). 67.09. supported five environmental initiatives: (1) a wood pellet boiler for our Science Building, (2) solar hot water panels and systems for five campus buildings, (3) campus-wide energy lighting efficiency project, (4) new efficiency boiler system in Colby Residence Hall, and (5) energy efficient lighting system for the new artificial athletic turf field. (1) New England College purchased and installed a new wood pellet boiler in the Science Building. This new boiler serves as the primary heating source for this building. Our boiler was purchased through New England Wood Pellet, LLC, located in Jaffrey, New Hampshire. The boiler selected was a Swebo, P500. 300KW wood pellet boiler. The primary goals, objectives, and outcomes of this initiative include the installation of a wood pellet boiler system that is environmentally friendly, highly efficient, and represents a sustainable and renewable resource for New England College. This project was completed on December 15, 2010. (2) New England College purchased and installed solar hot water panels and systems for the Science Building, the Simon Center (student center), the H. Raymond Danforth Library, Gilmore Dining Hall, and Bridges Gymnasium. The College worked with …
Date: September 30, 2010
Creator: Amato, Paula & Palmer, Gregory
System: The UNT Digital Library
Wetland Water Cooling Partnership: The Use of Constructed Wetlands to Enhance Thermoelectric Power Plant Cooling and Mitigate the Demand of Surface Water Use (open access)

Wetland Water Cooling Partnership: The Use of Constructed Wetlands to Enhance Thermoelectric Power Plant Cooling and Mitigate the Demand of Surface Water Use

Through the Phase I study segment of contract #DE-NT0006644 with the U.S. Department of Energy’s National Energy Technology Laboratory, Applied Ecological Services, Inc. and Sterling Energy Services, LLC (the AES/SES Team) explored the use of constructed wetlands to help address stresses on surface water and groundwater resources from thermoelectric power plant cooling and makeup water requirements. The project objectives were crafted to explore and develop implementable water conservation and cooling strategies using constructed wetlands (not existing, naturally occurring wetlands), with the goal of determining if this strategy has the potential to reduce surface water and groundwater withdrawals of thermoelectric power plants throughout the country. Our team’s exploratory work has documented what appears to be a significant and practical potential for augmenting power plant cooling water resources for makeup supply at many, but not all, thermoelectric power plant sites. The intent is to help alleviate stress on existing surface water and groundwater resources through harvesting, storing, polishing and beneficially re-using critical water resources. Through literature review, development of conceptual created wetland plans, and STELLA-based modeling, the AES/SES team has developed heat and water balances for conventional thermoelectric power plants to evaluate wetland size requirements, water use, and comparative cooling technology costs. …
Date: September 30, 2013
Creator: Apfelbaum, Steven; Duvall, Kenneth; Nelson, Theresa; Mensing, Douglas; Bengtson, Harlan; Eppich, John et al.
System: The UNT Digital Library
Integrated Advanced Energy Systems Research at IIT (open access)

Integrated Advanced Energy Systems Research at IIT

This report consists of Two research projects; Sustainable Buildings and Hydrogen Storage. Sustainable Building Part includes: Wind and the self powered built environment by professor P. Land and his research group and experimental and computational works by professor D. Rempfer and his research group. Hydrogen Storage part includes: Hydrogen Storage Using Mg-Mixed Metal Hydrides by professor H. Arastoopour and his research team and Carbon Nanostructure as Hydrogen Storage Material by professor J. Prakash and his research team.
Date: September 30, 2010
Creator: Arastoopour, Hamid
System: The UNT Digital Library
American Recovery and Reinvestment Act Federal Energy Management Program Technical Assistance Project 184 U.S. Customs and Border Protection Administrative and Laboratory Building, Springfield, Virginia (open access)

American Recovery and Reinvestment Act Federal Energy Management Program Technical Assistance Project 184 U.S. Customs and Border Protection Administrative and Laboratory Building, Springfield, Virginia

This report documents the findings of an on-site energy audit of the U.S. Customs and Border Protection Laboratory in Springfield, Virginia.
Date: September 30, 2010
Creator: Arends, J. & Sandusky, William F.
System: The UNT Digital Library
American Recovery and Reinvestment Act Federal Energy Management Program Technical Assistance Project 184 U.S. Customs and Border Protection Data Center, Springfield, Virginia (open access)

American Recovery and Reinvestment Act Federal Energy Management Program Technical Assistance Project 184 U.S. Customs and Border Protection Data Center, Springfield, Virginia

This report documents the findings of an on-site energy audit of the U.S. Customs and Border Protection (CBP) Data Center in Springfield, Virginia.
Date: September 30, 2010
Creator: Arends, J. & Sandusky, William F.
System: The UNT Digital Library
American Recovery and Reinvestment Act Federal Energy Management Program Technical Assistance Project 184 U.S. Customs and Border Protection Laboratory, Houston, Texas (open access)

American Recovery and Reinvestment Act Federal Energy Management Program Technical Assistance Project 184 U.S. Customs and Border Protection Laboratory, Houston, Texas

This report documents the findings of an on-site energy audit of the U.S. Customs and Border Protection (CBP) Laboratory in Houston, Texas. The focus of the audit was to identify various no-cost and low-cost energy efficiency opportunities that, once implemented, would reduce electricity and gas consumption and increase the operational efficiency of the building. This audit also provided an opportunity to identify potential capital cost projects that should be considered in the future to acquire additional energy (electric and gas) and water savings to further increase the operational efficiency of the building.
Date: September 30, 2010
Creator: Arends, J. & Sandusky, William F.
System: The UNT Digital Library
American Recovery and Reinvestment Act, Federal Energy Management Program, Technical Assistance Project 228 - US Army Installation Management Command - Pacific Region, Honolulu, Hawaii (open access)

American Recovery and Reinvestment Act, Federal Energy Management Program, Technical Assistance Project 228 - US Army Installation Management Command - Pacific Region, Honolulu, Hawaii

This report documents the activities of a resource efficiency manager that served the US Army Installation Management Command - Pacific Region during the period November 23, 2009 and August 31, 2010.
Date: September 30, 2010
Creator: Arends, J. & Sandusky, William F.
System: The UNT Digital Library
Internet Based, GIS Catalog of Non-Traditional Sources of Cooling Water for Use at America's Coal-Fired Power Plants (open access)

Internet Based, GIS Catalog of Non-Traditional Sources of Cooling Water for Use at America's Coal-Fired Power Plants

In recent years, rising populations and regional droughts have caused coal-fired power plants to temporarily curtail or cease production due to a lack of available water for cooling. In addition, concerns about the availability of adequate supplies of cooling water have resulted in cancellation of plans to build much-needed new power plants. These issues, coupled with concern over the possible impacts of global climate change, have caused industry and community planners to seek alternate sources of water to supplement or replace existing supplies. The Department of Energy, through the National Energy Technology Laboratory (NETL) is researching ways to reduce the water demands of coal-fired power plants. As part of the NETL Program, ALL Consulting developed an internet-based Catalog of potential alternative sources of cooling water. The Catalog identifies alternative sources of water, such as mine discharge water, oil and gas produced water, saline aquifers, and publicly owned treatment works (POTWs), which could be used to supplement or replace existing surface water sources. This report provides an overview of the Catalog, and examines the benefits and challenges of using these alternative water sources for cooling water.
Date: September 30, 2011
Creator: Arthur, J. Daniel
System: The UNT Digital Library
Accident Analysis for the NIST Research Reactor Before and After Fuel Conversion (open access)

Accident Analysis for the NIST Research Reactor Before and After Fuel Conversion

Postulated accidents have been analyzed for the 20 MW D2O-moderated research reactor (NBSR) at the National Institute of Standards and Technology (NIST). The analysis has been carried out for the present core, which contains high enriched uranium (HEU) fuel and for a proposed equilibrium core with low enriched uranium (LEU) fuel. The analyses employ state-of-the-art calculational methods. Three-dimensional Monte Carlo neutron transport calculations were performed with the MCNPX code to determine homogenized fuel compositions in the lower and upper halves of each fuel element and to determine the resulting neutronic properties of the core. The accident analysis employed a model of the primary loop with the RELAP5 code. The model includes the primary pumps, shutdown pumps outlet valves, heat exchanger, fuel elements, and flow channels for both the six inner and twenty-four outer fuel elements. Evaluations were performed for the following accidents: (1) control rod withdrawal startup accident, (2) maximum reactivity insertion accident, (3) loss-of-flow accident resulting from loss of electrical power with an assumption of failure of shutdown cooling pumps, (4) loss-of-flow accident resulting from a primary pump seizure, and (5) loss-of-flow accident resulting from inadvertent throttling of a flow control valve. In addition, natural circulation cooling at low …
Date: September 30, 2012
Creator: Baek, J.; Diamond, D.; Cuadra, A.; Hanson, A. L.; Cheng, L. Y. & Brown, N. R.
System: The UNT Digital Library
Internships, Fellowships, and Other Work Experience Opportunities in the Federal Government (open access)

Internships, Fellowships, and Other Work Experience Opportunities in the Federal Government

This report describes Internet resources on major internship, fellowship, and work experience programs within the federal government. It is intended as a selective guide for students of all levels: high school, undergraduate, graduate, and postgraduate.
Date: September 30, 2016
Creator: Bailey, Christina M. & Manning, Jennifer E.
System: The UNT Digital Library
Final Report for DE-FG36-08GO18007 "All-Inorganic, Efficient Photovoltaic Solid State Devices Utilizing Semiconducting Colloidal Nanocrystal Quantum Dots" (open access)

Final Report for DE-FG36-08GO18007 "All-Inorganic, Efficient Photovoltaic Solid State Devices Utilizing Semiconducting Colloidal Nanocrystal Quantum Dots"

We demonstrated robust colloidal quantum dot (QD) photovoltaics with high internal quantum efficiencies. In our structures, device durability is derived from use of all-inorganic atmospherically-stable semiconducting metal-oxide films together with QD photoreceptors. We have shown that both QD and metal-oxide semiconducting films and contacts are amenable to room temperature processing under minimal vacuum conditions, enabling large area processing of PV structures of high internal efficiency. We generated the state of the art devices with power conversion efficiency of more than 4%, and have shown that efficiencies as high as 9% are achievable in the near-term, and as high as 17% in the long-term.
Date: September 30, 2011
Creator: Bawendi, Vladimir Bulovic and Moungi
System: The UNT Digital Library
Energy and Water Development: FY2011 Appropriations (open access)

Energy and Water Development: FY2011 Appropriations

This report discusses the energy and water development appropriations bill that provides funding for civil works projects of the Army Corps of Engineers, the Department of the Interior's Bureau of Reclamation, the Department of Energy (DOE), and a number of independent agencies.
Date: September 30, 2010
Creator: Behrens, Carl E.
System: The UNT Digital Library
Recovery Act: Low Cost Integrated Substrate for OLED Lighting Development (open access)

Recovery Act: Low Cost Integrated Substrate for OLED Lighting Development

PPG pursued the development of an integrated substrate, including the anode, external, and internal extraction layers. The objective of PPG’s program was to achieve cost reductions by displacing the existing expensive borosilicate or double-side polished float glass substrates and developing alternative electrodes and scalable light extraction layer technologies through focused and short-term applied research. One of the key highlights of the project was proving the feasibility of using PPG’s high transmission Solarphire® float glass as a substrate to consistently achieve organic lightemitting diode (OLED) devices with good performance and high yields. Under this program, four low-cost alternatives to the Indium Tin Oxide (ITO) anode were investigated using pilot-scale magnetron sputtered vacuum deposition (MSVD) and chemical vapor deposition (CVD) technologies. The anodes were evaluated by fabricating small and large phosphorescent organic lightemitting diode (PHOLED) devices at Universal Display Corporation (UDC). The device performance and life-times comparable to commercially available ITO anodes were demonstrated. A cost-benefit analysis was performed to down-select two anodes for further low-cost process development. Additionally, PPG developed and evaluated a number of scalable and compatible internal and external extraction layer concepts such as scattering layers on the outside of the glass substrate or between the transparent anode and …
Date: September 30, 2012
Creator: Benton, Scott & Bhandari, Abhinav
System: The UNT Digital Library
Hydrogeologic Model for the Gable Gap Area, Hanford Site (open access)

Hydrogeologic Model for the Gable Gap Area, Hanford Site

Gable Gap is a structural and topographic depression between Gable Mountain and Gable Butte within the central Hanford Site. It has a long and complex geologic history, which includes tectonic uplift synchronous with erosional downcutting associated with the ancestral Columbia River during both Ringold and Cold Creek periods, and by the later Ice Age (mostly glacial Lake Missoula) floods. The gap was subsequently buried and partially backfilled by mostly coarse-grained, Ice Age flood deposits (Hanford formation). Erosional remnants of both the Ringold Formation and Cold Creek unit locally underlie the high-energy flood deposits. A large window exists in the gap where confined basalt aquifers are in contact with the unconfined suprabasalt aquifer. Several paleochannels, of both Hanford and Ringold Formation age, were eroded into the basalt bedrock across Gable Gap. Groundwater from the Central Plateau presently moves through Gable Gap via one or more of these shallow paleochannels. As groundwater levels continue to decline in the region, groundwater flow may eventually be cut off through Gable Gap.
Date: September 30, 2010
Creator: Bjornstad, Bruce N.; Thorne, Paul D.; Williams, Bruce A.; Last, George V.; Thomas, Gregory S.; Thompson, Michael D. et al.
System: The UNT Digital Library
ULTRACOATINGS: Enabling Energy and Power Solutions in High Contact Stress Environments through Next-Generation Nanocoatings (open access)

ULTRACOATINGS: Enabling Energy and Power Solutions in High Contact Stress Environments through Next-Generation Nanocoatings

This industry-driven project was the result of a successful response by Eaton Corporation to a DOE/ITP Program, Grand Challenge, industry call. It consisted of a one-year effort in which ORNL participated in the area of friction and wear testing. In addition to Eaton Corporation and ORNL (CRADA), the project team included: Ames Laboratory, who developed the underlying concept for titanium- zirconium-boron (TZB) based nanocomposite coatings; Borg-Warner Morse TEC, an automotive engine timing chain manufacturer in Ithaca, New York, with its own proprietary hard coating; and Pratt & Whitney Rocketdyne, Inc., a dry-solids pump manufacturer in San Fernando Valley, California. This report focuses only on the portion of work that was conducted by ORNL, in a CRADA with Eaton Corporation. A comprehensive final report for the entire effort, which ended in September 2010, has been prepared for DOE by the team. The term 'ultracoatings' derives from the ambitious technical target for the new generation of nanocoatings. As applications, Eaton was specifically considering a fuel pump and a gear application in which the product of the contact pressure and slip velocity during operation of mating surfaces, commonly called the 'PV value', was equal to or greater than 70,000 MPa-m/s. This ambitious target …
Date: September 30, 2011
Creator: Blau, P.; Qu, J. & Higdon, C., III
System: The UNT Digital Library
Materials for High-Pressure Fuel Injection Systems (open access)

Materials for High-Pressure Fuel Injection Systems

The high-level goal of this multi-year effort was to facilitate the Advanced Combustion Engine goal of 20% improvement (compared to 2009 baseline) of commercial engine efficiency by 2015. A sub-goal is to increase the reliability of diesel fuel injectors by investigating modelbased scenarios that cannot be achieved by empirical, trial and error methodologies alone. During this three-year project, ORNL developed the methodology to evaluate origins and to record the initiation and propagation of fatigue cracks emanating from holes that were electrodischarge machined (EDM), the method used to form spray holes in fuel injector tips. Both x-ray and neutron-based methods for measuring residual stress at four different research facilities were evaluated to determine which, if any, was most applicable to the fuel injector tip geometry. Owing to the shape and small volumes of material involved in the sack area, residual stress data could only be obtained in the walls of the nozzle a few millimeters back from the tip, and there was a hint of only a small compressive stress. This result was consistent with prior studies by Caterpillar. Residual stress studies were suspended after the second year, reserving the possibility of pursuing this in the future, if and when methodology …
Date: September 30, 2011
Creator: Blau, P.; Shyam, A.; Hubbard, C.; Howe, J.; Trejo, R.; Yang, N. (Caterpillar, Inc. Technical Center) et al.
System: The UNT Digital Library
Hydrogen and Fuel Cell Education at California State University, Los Angeles (open access)

Hydrogen and Fuel Cell Education at California State University, Los Angeles

California State University, Los Angeles, has partnered with the Department of Energy in addressing the workforce preparation and public education needs of the fuel cell industry and the US economy through a comprehensive set of curriculum development and training activities: * Developing and offering several courses in fuel cell technologies, hydrogen and alternative fuels production, alternative and renewable energy technologies as means of zero emissions hydrogen economy, and sustainable environment. * Establishing a zero emissions PEM fuel cell and hydrogen laboratory supporting curriculum and graduate students’ teaching and research experiences. * Providing engaging capstone projects for multi-disciplinary teams of senior undergraduate students. * Fostering partnerships with automotive OEMs and energy providers. * Organizing and participating in synergistic projects and activities that grow the program and assure its sustainability.
Date: September 30, 2011
Creator: Blekhman, David
System: The UNT Digital Library
Gluons and the quark sea at high energies: distributions, polarization, tomography (open access)

Gluons and the quark sea at high energies: distributions, polarization, tomography

This report is based on a ten-week program on Gluons and the quark sea at high-energies, which took place at the Institute for Nuclear Theory (INT) in Seattle in Fall 2010. The principal aim of the program was to develop and sharpen the science case for an Electron-Ion Collider (EIC), a facility that will be able to collide electrons and positrons with polarized protons and with light to heavy nuclei at high energies, offering unprecedented possibilities for in-depth studies of quantum chromodynamics (QCD). This report is organized around the following four major themes: (i) the spin and flavor structure of the proton, (ii) three dimensional structure of nucleons and nuclei in momentum and configuration space, (iii) QCD matter in nuclei, and (iv) Electroweak physics and the search for physics beyond the Standard Model. Beginning with an executive summary, the report contains tables of key measurements, chapter overviews for each of the major scientific themes, and detailed individual contributions on various aspects of the scientific opportunities presented by an EIC.
Date: September 30, 2011
Creator: Boer, D.; Venugopalan, R.; Diehl, M.; Milner, R.; Vogelsang, W. & al., et
System: The UNT Digital Library
Radionuclide Retention in Concrete Wasteforms (open access)

Radionuclide Retention in Concrete Wasteforms

Assessing long-term performance of Category 3 waste cement grouts for radionuclide encasement requires knowledge of the radionuclide-cement interactions and mechanisms of retention (i.e., sorption or precipitation); the mechanism of contaminant release; the significance of contaminant release pathways; how wasteform performance is affected by the full range of environmental conditions within the disposal facility; the process of wasteform aging under conditions that are representative of processes occurring in response to changing environmental conditions within the disposal facility; the effect of wasteform aging on chemical, physical, and radiological properties; and the associated impact on contaminant release. This knowledge will enable accurate prediction of radionuclide fate when the wasteforms come in contact with groundwater. The information present in the report provides data that (1) measures the effect of concrete wasteform properties likely to influence radionuclide migration; and (2) quantifies the rate of carbonation of concrete materials in a simulated vadose zone repository.
Date: September 30, 2011
Creator: Bovaird, Chase C.; Jansik, Danielle P.; Wellman, Dawn M. & Wood, Marcus I.
System: The UNT Digital Library
American Recovery and Reinvestment Act (ARRA) Federal Energy Management Program Technical Assistance Project 282 Renewable Energy Opportunities at Fort Gordon, Georgia (open access)

American Recovery and Reinvestment Act (ARRA) Federal Energy Management Program Technical Assistance Project 282 Renewable Energy Opportunities at Fort Gordon, Georgia

This document provides an overview of renewable resource potential at Fort Gordon, based primarily upon analysis of secondary data sources supplemented with limited on-site evaluations. This effort focuses on grid-connected generation of electricity from renewable energy sources and also on ground source heat pumps for heating and cooling buildings. The effort was funded by the American Recovery and Reinvestment Act (ARRA) as follow-on to the 2005 Department of Defense (DoD) Renewables Assessment. The site visit to Fort Gordon took place on March 9, 2010.
Date: September 30, 2010
Creator: Boyd, Brian K.; Gorrissen, Willy J.; Hand, James R.; Horner, Jacob A.; Orrell, Alice C.; Russo, Bryan J. et al.
System: The UNT Digital Library