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Next Generation Extractants for Cesium Separation from High-Level Waste: From Fundamental Concepts to Site Implementation
This project seeks a fundamental understanding and major improvement in cesium separation from high-level waste by cesium-selective calixcrown extractants. Systems of particular interest involve novel solvent-extraction systems containing specific members of the calix[4]arene-crown-6 family, alcohol solvating agents, and alkylamines. Questions being addressed bear upon cesium binding strength, extraction selectivity, cesium stripping, and extractant solubility. Enhanced properties in this regard will specifically benefit applied projects funded by the USDOE Office of Environmental Management to clean up sites such as the Savannah River Site (SRS), Hanford, and the Idaho National Environmental and Engineering Laboratory. The most direct beneficiary will be the SRS Salt Processing Project, which has recently identified the Caustic-Side Solvent Extraction (CSSX) process employing a calixcrown as its preferred technology for cesium removal from SRS high-level tank waste.
Date:
June 1, 2002
Creator:
Moyer, Bruce A.; Bonnesen, Peter V.; Bryan, Jeffrey C.; Engle, Nancy L.; Keever, Tamara J.; Levitskaia, Tatiana G. et al.
System:
The UNT Digital Library
OPTICAL FIBER SENSOR TECHNOLOGIES FOR EFFICIENT AND ECONOMICAL OIL RECOVERY
Efficient recovery of petroleum reserves from existing oil wells has been proven to be difficult due to the lack of robust instrumentation that can accurately and reliably monitor processes in the downhole environment. Commercially available sensors for measurement of pressure, temperature, and fluid flow exhibit shortened lifetimes in the harsh downhole conditions, which are characterized by high pressures (up to 20 kpsi), temperatures up to 250 C, and exposure to chemically reactive fluids. Development of robust sensors that deliver continuous, real-time data on reservoir performance and petroleum flow pathways will facilitate application of advanced recovery technologies, including horizontal and multilateral wells. This is the final report for the four-year program ''Optical Fiber Sensor Technologies for Efficient and Economical Oil Recovery'', funded by the National Petroleum Technology Office of the U.S. Department of Energy, and performed by the Center for Photonics Technology of the Bradley Department of Electrical and Computer Engineering at Virginia Tech from October 1, 1999 to March 31, 2003. The main objective of this research program was to develop cost-effective, reliable optical fiber sensor instrumentation for real-time monitoring of various key parameters crucial to efficient and economical oil production. During the program, optical fiber sensors were demonstrated for …
Date:
June 1, 2003
Creator:
Wang, Anbo; Cooper, Kristie L. & Pickrell, Gary R.
System:
The UNT Digital Library
Restoring Sustainable Forests on Appalachian Mined Lands for Wood Products, Renewable Energy, Carbon Sequestration, and Other Ecosystems Services Quarterly Report
The overall purpose of this project is to evaluate the biological and economic feasibility of restoring high-quality forests on mined land, and to measure carbon sequestration and wood production benefits that would be achieved from forest restoration procedures. In this quarterly report, we present a preliminary comparison of the carbon sequestration potential of forests growing on 14 mined sites in a seven-state region in the Midwestern and Eastern Coalfields. Carbon contents of these forests were compared to adjacent forests on non-mined land. The study was installed as a 3 x 3 factorial in a random complete block design with three replications at each location. The treatments include three forest types (white pine, hybrid poplar, mixed hardwood) and three silvicultural regimes (competition control, competition control plus tillage, competition control plus tillage plus fertilization). Each individual treatment plot is 0.5 acres. Each block of nine plots requires 4.5 acres, and the complete installation at each site requires 13.5 acres. The plots at all three locations have been installed and the plot corners marked with PVC stakes. GPS coordinates of each plot have been collected. Soil samples were collected from each plot to characterize the sites prior to treatment. Analysis of soil samples …
Date:
June 4, 2004
Creator:
Burger, J.; Galbraith, J.; Fox, T.; Amacher, G.; Sullivan, J. & Zipper, C.
System:
The UNT Digital Library
Final Report for National Transport Code Collaboration PTRANSP
PTRANSP, which is the predictive version of the TRANSP code, was developed in a collaborative effort involving the Princeton Plasma Physics Laboratory, General Atomics Corporation, Lawrence Livermore National Laboratory, and Lehigh University. The PTRANSP/TRANSP suite of codes is the premier integrated tokamak modeling software in the United States. A production service for PTRANSP/TRANSP simulations is maintained at the Princeton Plasma Physics Laboratory; the server has a simple command line client interface and is subscribed to by about 100 researchers from tokamak projects in the US, Europe, and Asia. This service produced nearly 13000 PTRANSP/TRANSP simulations in the four year period FY 2005 through FY 2008. Major archives of TRANSP results are maintained at PPPL, MIT, General Atomics, and JET. Recent utilization, counting experimental analysis simulations as well as predictive simulations, more than doubled from slightly over 2000 simulations per year in FY 2005 and FY 2006 to over 4300 simulations per year in FY 2007 and FY 2008. PTRANSP predictive simulations applied to ITER increased eight fold from 30 simulations per year in FY 2005 and FY 2006 to 240 simulations per year in FY 2007 and FY 2008, accounting for more than half of combined PTRANSP/TRANSP service CPU resource …
Date:
June 14, 2012
Creator:
Kritz, Arnold H.
System:
The UNT Digital Library
Restoring Sustainable Forests on Appalachian Mined Lands for Wood Products, Renewable Energy, Carbon Sequestration, and Other Ecosystems Services Quarterly Report
The overall purpose of this project is to evaluate the biological and economic feasibility of restoring high-quality forests on mined land, and to measure carbon sequestration and wood production benefits that would be achieved from forest restoration procedures. We are currently estimating the acreage of lands in VA, WV, KY, OH, and PA mined under SMCRA and reclaimed to non-forested post-mining land uses that are not currently under active management, and therefore can be considered as available for carbon sequestration. To determine actual sequestration under different forest management scenarios, a field study was installed as a 3 x 3 factorial in a random complete block design with three replications at each of three locations, Ohio, West Virginia, and Virginia. The treatments included three forest types (white pine, hybrid poplar, mixed hardwood) and three silvicultural regimes (competition control, competition control plus tillage, competition control plus tillage plus fertilization). Each individual treatment plot is 0.5 acres. Each block of nine plots is 4.5 acres, and the complete installation at each site is 13.5 acres. During the reporting period we compiled and evaluated all soil properties measured on the study sites. Statistical analysis of the properties was conducted, and first year survival and …
Date:
June 8, 2005
Creator:
Burger, James A.; Galbraith, J.; Fox, T.; Amacher, G.; Sullivan, J. & Zipper, C.
System:
The UNT Digital Library
CdSiAs/sub 2/ thin films for solar cell applications. Final report, April 9, 1979-April 8, 1980
Compounds of Cd-Si-As required for sputtering targets and evaporation charges were synthesized by direct fusion. These include CdSiAs/sub 2/, Cd/sub 3/As/sub 2/, CdAs/sub 2/ and SiAs. Polycrystalline ingots of CdSiAs/sub 2/ were found to be porous, with the chalcopyrite structure, and with minor amounts of other phases such as CdAs/sub 2/, SiAs,As and Cd/sub 3/As/sub 2/. Sputtered films were formed in a single target RF system. A homogeneous CdSiAs/sub 2/ target was initially used, followed by composite targets consisting of CdAs/sub 2/ + Si. Films from the latter targets were superior to the others and were more extensively studied. As deposited films were amorphous, off stoichiometry, with resistivities over 10/sup 8/..cap omega..-cm and band gaps of approx. 1.4 eV. Subsequent reactive heat treatments in the 515/sup 0/ to 615/sup 0/C range resulted in crystalline films, resistivities of 1 to 10 ..cap omega.. cm, CdSiAs/sub 2/ compositions within 1% of stoichiometry, energy gap of approx. 1.55 eV, absorption coefficient of 2 x 10/sup 4/cm/sup -1/ at 0.6 ..mu..m, but with poor mechanical properties (mainly cracking). A Ta/Si0/sub 2/ substrate proved to be the best for these films. Thermal evaporation studies of CdSiAs/sub 2/ established that effusion is preferential toward Cd between …
Date:
June 1, 1980
Creator:
Burton, L.C. & Slack, L.H.
System:
The UNT Digital Library
THREE DIMENSIONAL INTEGRATED CHARACTERIZATION AND ARCHIVING SYSTEM (3D-ICAS)
The overall objective of this project is to develop an integrated system that remotely characterizes, maps, and archives measurement data of hazardous decontamination and decommissioning (D&D) areas. The system will generate a detailed 3-dimensional topography of the area as well as real-time quantitative measurements of volatile organics and radionuclides. The system will analyze substrate materials consisting of concrete, asbestos, and transite. The system will permanently archive the data measurements for regulatory and data integrity documentation. Exposure limits, rest breaks, and donning and removal of protective garments generate waste in the form of contaminated protective garments and equipment. Survey times are increased and handling and transporting potentially hazardous materials incur additional costs. Off-site laboratory analysis is expensive and time-consuming, often necessitating delay of further activities until results are received. The Three Dimensional Integrated Characterization and Archiving System (3D-ICAS) has been developed to alleviate some of these problems. 3D-ICAS provides a flexible system for physical, chemical and nuclear measurements reduces costs and improves data quality. Operationally, 3D-ICAS performs real-time determinations of hazardous and toxic contamination. A prototype demonstration unit is available for use in early 2000. The tasks in this Phase included: (1) Mobility Platforms: Integrate hardware onto mobility platforms, upgrade surface …
Date:
June 18, 2001
Creator:
Jarvis, George
System:
The UNT Digital Library
Summary Report of the Needs Assessment
This report is part of the Web-at-Risk project, one of eight digital preservation projects funded in 2004 by the Library of Congress.
Date:
June 18, 2006
Creator:
Murray, Kathleen R. & Hsieh, Inga K.
System:
The UNT Digital Library
Human radiation studies: Remembering the early years. Oral history of physiologist Nello Pace, Ph.D., August 16, 1994
Dr. Nello Pace was interviewed by representatives of the US DOE Office of Human Radiation Experiments (OHRE). Dr. Pace was selected fro the interview because of the positions he held with the US Navy, at the University of California, Berkeley, and as Director of the White Mountain Research Station near Bishop, California. Following a brief biographical sketch, Dr. Pace related his remembrances concerning tritium injections experiments in animals and humans during World War II, the development of Medical Physics Degree Programs at UC Berkeley, conducting the first radiation survey at Nagasaki after the bomb, and the establishment of a research laboratory at White Mountain. He also offers reflections on Shields Warren and comments on the public`s attitudes towards radiation both then and now.
Date:
June 1, 1995
Creator:
unknown
System:
The UNT Digital Library
Military Service Records and Unit Histories: A Guide to Locating Sources
This report provides information on locating military unit histories and individual service records of discharged, retired, and deceased military personnel. It includes contact information for military history centers, websites for additional sources of research, and a bibliography of other publications.
Date:
June 15, 2010
Creator:
Gomez-Granger, Julissa & Leland, Anne
System:
The UNT Digital Library
Human radiation studies: Remembering the early years: Oral history of radiologist Henry I. Kohn, M.D., Ph.D., conducted September 13, 1994
This report is a transcript of an interview of Dr. Henry I. Kohn by representatives of the US DOE Office of Human Radiation Experiments. Dr. Kohn was selected for this interview because of the positions he held at Oak Ridge National Laboratory, University of California at San Francisco, and Harvard Medical School. Dr. Kohn discussed his remembrances of his experiences in blood chemistry of animals and patients exposed to radiation, and his remembrances of several radiobiologists.
Date:
June 1, 1995
Creator:
unknown
System:
The UNT Digital Library
Security Classified and Controlled Information: History, Status, and Emerging Management Issues
None
Date:
June 26, 2006
Creator:
Relyea, Harold C.
System:
The UNT Digital Library
Digitization of Government Information
Report submitted by an American Libraries Association (ALA) Government Documents Round Table (GODORT) ad hoc committee charged to "create a report advising GODORT on the best practices and procedures in the digital library field and advise GODORT on the most effective organizational structure for support of the government information community in pursuing digital library initiatives" (p. 2).
Date:
June 14, 2002
Creator:
American Library Association. Government Documents Round Table. Ad Hoc Committee on Digitization Of Government Information.
System:
The UNT Digital Library
Geothermal regimes of the Clearlake region, northern California
The first commercial production of power from geothermal energy, at The Geysers steamfield in northern California in June 1960, was a triumph for the geothermal exploration industry. Before and since, there has been a search for further sources of commercial geothermal power in The Geysers--Clear Lake geothermal area surrounding The Geysers. As with all exploration programs, these were driven by models. The models in this case were of geothermal regimes, that is, the geometric distribution of temperature and permeability at depth, and estimates of the physical conditions in subsurface fluids. Studies in microseismicity and heat flow, did yield geophysical information relevant to active geothermal systems. Studies in stable-element geochemistry found hiatuses or divides at the Stoney Creek Fault and at the Collayomi Fault. In the region between the two faults, early speculation as to the presence of steamfields was disproved from the geochemical data, and the potential existence of hot-water systems was predicted. Studies in isotope geochemistry found the region was characterized by an isotope mixing trend. The combined geochemical data have negative implications for the existence of extensive hydrothermal systems and imply that fluids of deep origin are confined to small, localized systems adjacent to faults that act as …
Date:
June 1, 1998
Creator:
Amador, M.; Burns, K. L. & Potter, R. M.
System:
The UNT Digital Library
National Digital Stewardship Alliance Web Archiving Survey Report: 2012
The National Digital Stewardship Alliance is a member organization whose mission is to establish, maintain, and advance the capacity to preserve our nation's digital resources for the benefit of present and future generations. From October 3 through October 31, 2011, the Content Working Group conducted a survey of organizations in the United States that are actively involved in, or planning to start, programs to archive content from the web. The goal of the survey was to better understand the landscape of web archiving activities in the United States, including identifying the organizations or individuals involved, the types of web content being preserved, the tools and services being used, and the types of access being provided. This summary report examines participant responses for the purposes of discerning trends, themes, and emerging practices and challenges in web-based content acquisition and preservation.
Date:
June 19, 2012
Creator:
National Digital Stewardship Alliance (U.S.)
System:
The UNT Digital Library
Study to Conduct National Register of Historic Places Evaluations of Submerged Sites on the Gulf of Mexico Outer Continental Shelf
This report covers the preliminary research necessary to apply for the National Register of Historic Places to protect historic shipwrecks located in shallow portions of the northern part of the Gulf of Mexico.
Date:
June 2006
Creator:
Enright, Jeffrey M.; Gearhart, Robert, II; Jones, Doug & Enright, Jenna
System:
The UNT Digital Library
Former Camp Wolters Historical Aerial Photographic Analysis, June 2003
Report containing aerial photography of portions of Parker and Palo Pinto Counties, Texas, for the purpose of mapping historical locations of Camp Wolters onto the modern landscape.
Date:
June 2003
Creator:
Engineer Research and Development Center (U.S.)
System:
The Portal to Texas History
Security Classification Policy and Procedure: E.O. 12958, as Amended
This report describes security classification policy and procedure, largely prescribed in a series of successive presidential executive orders issued over the past 50 years. This policy provides the rationale and arrangements for designating information officially secret for reasons of national security, and for its declassification as well.
Date:
June 4, 2009
Creator:
Kosar, Kevin R.
System:
The UNT Digital Library
Freedom of Information Act: Key Website Is Generally Reliable, but Action Is Needed to Ensure Completeness of Its Reports
A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Justices (Justice) website called FOIA.gov presents data from agencies annual Freedom of Information Act (FOIA) reports. Agencies submit their annual reports to Justice in print and in electronic form and Justice posts the electronic data onto the website. For fiscal year 2010, the data GAO reviewed on the website were generally consistent with the data in the agencies print versions. According to Justice officials, the department has taken steps to ensure accuracy and consistency of the data. These steps include providing annual training to agency personnel who are responsible for preparation of the FOIA annual reports and posting guidance for report completion and submission on the Office of Information Policy website. In addition, the department has implemented checks to ensure data consistency between the two report versions. Specifically, it has developed and provided agencies with a tool to be used in creating the electronic version for the website. The tool contains features that assist agencies in compiling their data and math checks to help ensure consistency. Further, Justice officials have a checklist they use as a guide for checking the consistency of the …
Date:
June 28, 2012
Creator:
United States. Government Accountability Office.
System:
The UNT Digital Library
U.S.-China Military Contacts: Issues for Congress
This CRS report, updated as warranted, discusses policy issues regarding military-to-military (mil-to-mil) contacts with the People's Republic of China (PRC) and provides a record of major contacts and crises since 1993.
Date:
June 19, 2012
Creator:
Kan, Shirley A.
System:
The UNT Digital Library
[Office of Hanford Directed Operations events of importance for week ending June 1, 1949]
This report details events of importance reported by the Hanford Operations Office for the week ending June 1, 1949.
Date:
June 3, 1949
Creator:
Schlemmer, F. C.
System:
The UNT Digital Library
[Office of Hanford Directed Operations events of importance for week ending June 8, 1949]
This report details events of importance reported by the Hanford Operations Office for the week ending June 8, 1949.
Date:
June 10, 1949
Creator:
Schlemmer, F. C.
System:
The UNT Digital Library
Financial Services and General Government (FSGG): FY2011 Appropriations
This report discusses the Financial Services and General Government (FSGG) FY2011 appropriations bill, which includes funding for the Department of the Treasury, the Executive Office of the President (EOP), the judiciary, the District of Columbia, and 26 independent agencies, including the Small Business Administration and the United States Postal Service.
Date:
June 14, 2011
Creator:
Hatch, Garrett
System:
The UNT Digital Library
Events of importance for week ending June 15, 1949
This report details events of importance reported by the Hanford Operations Office for the week ending June 15, 1949.
Date:
June 17, 1949
Creator:
Schlemmer, F. C.
System:
The UNT Digital Library