Rare Earth Elements: The Global Supply Chain

Rare Earth Elements: The Global Supply Chain

Date: December 16, 2013
Creator: Humphries, Marc
Description: This report provides a discussion of the major issues and concerns of the global supply chain for rare earth elements (REEs), their major end uses, and legislative and other policy proposals that Congress may consider to improve the U.S. rare earth position.
Contributing Partner: UNT Libraries Government Documents Department
Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress

Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress

Date: December 23, 2013
Creator: Grasso, Valerie Bailey
Description: This report covers concerns that Congress has expressed over U.S. acquisition of rare earth elements, particularly those used in various components of defense weapon systems. Specific concerns are the acquisition of these elements, especially from foreign sources such as China; how dependence of foreign sources affects national security; and methods for decreasing the relationship between reliance on foreign sources and national security.
Contributing Partner: UNT Libraries Government Documents Department
Rare Earth Elements: The Global Supply Chain

Rare Earth Elements: The Global Supply Chain

Date: July 28, 2010
Creator: Humphries, Marc
Description: This report provides a discussion on the major issues and concerns of the global supply chain for rare earth elements, their major end uses, and legislative and other policy proposals that Congress may consider to improve the U.S. rare earth position.
Contributing Partner: UNT Libraries Government Documents Department
The Specialty Metal Provision and the Berry Amendment: Issues for Congress

The Specialty Metal Provision and the Berry Amendment: Issues for Congress

Date: May 14, 2008
Creator: Grasso, Valerie Bailey
Description: This report examines the specialty metal provision which was originally part of the Berry Amendment; the potential oversight issues for Congress, and options that Congress may wish to consider. The debate over the specialty metal provision may also renew interest in the debate over the viability of other domestic source restrictions. There is congressional interest in the specialty metal provision because: (1) the specialty metal restriction affects major defense contractors who produce components for commercial airplanes; (2) some prime defense contractors as well as subcontractors on the second, third, and fourth tiers have stated that they were unable to comply with the Berry Amendment specialty metal requirement; (3) the Department of Defense (DOD) has authorized the use of waivers to purchase non-compliant items (non-compliant specialty metal are metal that do not meet the 100% domestic source requirement of the Berry Amendment); and (4) the long-term impact of the specialty metal provision on the costs of defense equipment and programs, particularly on the requirement that weapon system components be certified as made in the United States.
Contributing Partner: UNT Libraries Government Documents Department
The Specialty Metal Provision and the Berry Amendment: Issues for Congress

The Specialty Metal Provision and the Berry Amendment: Issues for Congress

Date: September 2, 2008
Creator: Grasso, Valerie Bailey
Description: This report examines the specialty metal provision which was originally part of the Berry Amendment; the potential oversight issues for Congress, and options that Congress may wish to consider. The debate over the specialty metal provision may also renew interest in the debate over the viability of other domestic source restrictions. There is congressional interest in the specialty metal provision because: (1) the specialty metal restriction affects major defense contractors who produce components for commercial airplanes; (2) some prime defense contractors as well as subcontractors on the second, third, and fourth tiers have stated that they were unable to comply with the Berry Amendment specialty metal requirement; (3) DOD has authorized the use of waivers to purchase non-compliant items (non-compliant specialty metal are metal that do not meet the 100% domestic source requirement of the Berry Amendment); and (4) the long-term impact of the specialty metal provision on the costs of defense equipment and programs, particularly on the requirement that weapon system components be certified as made in the United States.
Contributing Partner: UNT Libraries Government Documents Department
Seasonal trends in growth and biomass accumulation of selected nutrients and metals in six species of emergent aquatic macrophytes

Seasonal trends in growth and biomass accumulation of selected nutrients and metals in six species of emergent aquatic macrophytes

Date: May 1, 1996
Creator: Behrends, L.L.; Bailey, E.; Bulls, M.J.; Coonrod, H.S. & Sikora, F.J.
Description: Growth and biomass accumulation of selected nutrients and trace metals were monitored for six species of aquatic macrophytes during June, August and November, 1993. Plant species were cultivated in two polyculture treatments, each replicated three times. Polyculture I consisted of Scirpus acutus (hardstem bullrush), Phragmites communes (common reed), and Phalaris arundinacea (canary grass). Polyculture H consisted of Typha spp. (cattail), Scirpus atrovirens (green bullrush), and Scirpus cyperinus (wool grass). Each of the six cells (6 x 9 x 0.6 m), was operated as a gravel-substrate, subsurface-flow wetlands in a continuous recirculating mode. At six week intervals, macro, micro and trace elements were dissolved and added to the sump of the recirculating system. On each of three sampling dates, replicate shoot and root samples were collected, segregated by species and tissue type (roots, rhizomes, stems and leaves), and prepared for gravimetric biomass estimates and chemical analysis. Tissue specific concentrations of N, P, K, Ca, Mg, Fe, Mn, Zn and Cu, were determined on each date for each species and tissue type. Results will be discussed with respect to species specific growth rates, biomass accumulation, and seasonal uptake and translocation of plant nutrients.
Contributing Partner: UNT Libraries Government Documents Department
Cs--U--O Phase Diagram and its Application to Uranium--Plutonium Oxide Fast Reactor Fuel Pins

Cs--U--O Phase Diagram and its Application to Uranium--Plutonium Oxide Fast Reactor Fuel Pins

Date: August 1977
Creator: Davis, S. A.; Johnson, C. E.; Johnson, I.; Fee, D. C.; Shinn, W. A. & Staahl, G.
Description: Portions of the cesium-uranium-oxygen system have been investigated between 873 and 1273°K and a phase diagram has been constructed using our data and the data of other workers in the field. Thermodynamic and kinetic data have been used to examine the reactions that occur in fast-reactor fuel pins between fission-product cesium and the uranium oxide blanket. It was concluded that at the low oxygen potentials existing at the interface between the uranium-plutonium mixed-oxide and the uranium oxide blanket, Cs₂UO₄ is the only Cs-U-O compound expected to be formed in the uranium oxide blanket.
Contributing Partner: UNT Libraries Government Documents Department
The Specialty Metal Provision and the Berry Amendment: Issues for Congress

The Specialty Metal Provision and the Berry Amendment: Issues for Congress

Date: October 5, 2010
Creator: Grasso, Valerie Bailey
Description: In order to protect the U.S. industrial base during periods of adversity and war, Congress passed a set of domestic source restrictions which became known as the Berry Amendment. Specialty metal represented one of fourteen items previously covered under the Berry Amendment. Congress took action in the FY2007 National Defense Authorization Act to move the specialty metal provision from the Berry Amendmgent into a separate section of Title 10. This report examines the specialty metal provision, potential oversight issues for Congress, and options that Congress may choose to consider.
Contributing Partner: UNT Libraries Government Documents Department
Advanced emissions control development project. Phase I, Final report, November 1, 1993--February 19, 1996

Advanced emissions control development project. Phase I, Final report, November 1, 1993--February 19, 1996

Date: February 29, 1996
Creator: unknown
Description: The primary objective of the Advanced Emissions Control Development Program (AECDP) is to develop practical, cost-effective strategies for reducing the emissions of air toxics from coal-fired boilers. Ideally, the project aim is to effectively control air toxic emissions through the use of conventional flue gas cleanup equipment such as electrostatic precipitators (ESP`s), fabric filters (baghouse), and wet flue gas desulfurization. B&W`s Clean Environment Development Facility (CEDF) and the AECDP equipment combined to form a state-of-the-art facility for integrated evaluation of combustion and post-combustion emissions control options. Phase 1 activities were primarily aimed at providing a reliable, representative test facility for conducting air toxic emissions control development work later in the project. This report summarizes the AECDP Phase I activities which consisted of the design, installation, shakedown, verification, and air toxics benchmarking of the AECDP facility. All verification and air toxic tests were conducted with a high sulfur, bituminous Ohio coal.
Contributing Partner: UNT Libraries Government Documents Department
Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress

Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress

Date: April 11, 2012
Creator: Grasso, Valerie Bailey
Description: Some Members of Congress have expressed concern over U.S. acquisition of rare earth materials composed of rare earth elements used in various components of defense weapon systems. On March 13, 2012, President Obama announced that the United States had joined with Japan and the European Union to bring a World Trade Organization joint dispute resolution case against China because of China's restrictive policies on rare earths and other minerals. Congress may encourage DOD to develop a collaborative, long-term, well-thought-out strategy designed to identify any material weaknesses and vulnerabilities associated with rare earths and to protect long-term U.S. national security interests.
Contributing Partner: UNT Libraries Government Documents Department
Rational Synthesis of Imprinted Organofunctional Sol-Gel Materials for Toxic Metal Separation - Final Report - 09/15/1997 - 09/14/2001

Rational Synthesis of Imprinted Organofunctional Sol-Gel Materials for Toxic Metal Separation - Final Report - 09/15/1997 - 09/14/2001

Date: September 14, 2001
Creator: Xue, Ziling (Ben); Barnes, Craig E. & Dai, Shang
Description: Current cost estimates for the environmental remediation of contaminated installations under the auspices of the Department of Energy (DOE) are staggering. On this basis alone, there is a critical need to develop the scientific basis for new approaches to the treatment and disposal of toxic metal ions from wastes or contaminated areas at many DOE sites. The overall goal of this project is to rationally design and synthesize imprinted, hybrid inorganic-organic sol-gel materials containing metal binding sites through template approaches, and to develop a scientific basis for metal ion binding and recognition by such tailored hybrid inorganic-organic materials. After removal of the template M, functionalized cavities are created which contain both grafted binding sites and functionality inherent to the silica network (Si-OH, Si-O-Si). These cavities are expected to ''recognize'' and bind the target metal ions through the high affinities between the binding sites and M, and their retained shapes. Our approaches utilize both the metal ion binding and the tailored impressions of the template metal ions in the imprinted cavities. Such imprinted organofunctional sol-gel networks are expected to exhibit both high selectivity and capacity for binding targeted ions in fluid waste streams. The principles of sol-gel chemistry and imprinting techniques ...
Contributing Partner: UNT Libraries Government Documents Department
Corrective Action Investigation Plan for Corrective Action Unit 252: Area 25 Engine Test Stand 1 Decontamination Pad, Nevada Test Site, Nevada

Corrective Action Investigation Plan for Corrective Action Unit 252: Area 25 Engine Test Stand 1 Decontamination Pad, Nevada Test Site, Nevada

Date: August 20, 1999
Creator: U.S. Department of Energy, Nevada Operations Office
Description: This Corrective Action Investigation Plan contains the U.S. Department of Energy, Nevada Operations Office's approach to collect the data necessary to evaluate corrective action alternatives appropriate for the closure of Corrective Action Unit 252 under the Federal Facility Agreement and Consent Order. Corrective Action Unit 252 consists of Corrective Action Site (CAS) 25-07-02, Engine Test Stand-1 (ETS-1) Decontamination Pad. Located in Area 25 at the intersection of Road H and Road K at the Nevada Test Site, ETS-1 was designed for use as a mobile radiation checkpoint and for vehicle decontamination. The CAS consists of a concrete decontamination pad with a drain, a gravel-filled sump, two concrete trailer pads, and utility boxes. Constructed in 1966, the ETS-1 facility was part of the Nuclear Rocket Development Station (NRDS) complex and used to test nuclear rockets. The ETS-1 Decontamination Pad and mobile radiation check point was built in 1968. The NRDS complex ceased primary operations in 1973. Based on site history, the focus of the field investigation activities will be to determine if any primary contaminants of potential concern (COPCs) (including radionuclides, total volatile organic compounds, total semivolatile organic compounds, total petroleum hydrocarbons as diesel-range organics, Resource Conservation and Recovery Act metals, ...
Contributing Partner: UNT Libraries Government Documents Department
Corrective Action Decision Document/Closure Report for Corrective Action Unit 232: Area 25 Sewage Lagoons, Nevada Test Site, Nevada

Corrective Action Decision Document/Closure Report for Corrective Action Unit 232: Area 25 Sewage Lagoons, Nevada Test Site, Nevada

Date: December 23, 1999
Creator: Office, US Department of Energy Nevada Operations
Description: This Corrective Action Decision Document/Closure Report (CADD/CR) has been prepared for Corrective Action Unit (CAU) 232, Area 25 Sewage Lagoons, in accordance with the Federal Facility Agreement and Consent Order. Located at the Nevada Test Site in Nevada, approximately 65 miles northwest of Las Vegas, CAU 232 is comprised of Corrective Action Site 25-03-01, Sewage Lagoon. This CADD/CR identifies and rationalizes the U.S. Department of Energy, Nevada Operations Office's (DOE/NV's) recommendation that no corrective action is deemed necessary for CAU 232. The Corrective Action Decision Document and Closure Report have been combined into one report because sample data collected during the July 1999 corrective action investigation (CAI) activities disclosed no evidence of contamination at the site. Contaminants of potential concern (COPCs) addressed during the CAI included total volatile organic compounds, total semivolatile organic compounds, total Resource Conservation and Recovery Act metals, total pesticides, total herbicides, total petroleum hydrocarbons (gasoline and diesel/oil range), polychlorinated biphenyls, isotopic uranium, isotopic plutonium, strontium-90, and gamma-emitting radionuclides. The data confirmed that none of the COPCs identified exceeded preliminary action levels outlined in the CAIP; therefore, no corrective actions were necessary for CAU 232. After the CAI, best management practice activities were completed and included installation ...
Contributing Partner: UNT Libraries Government Documents Department
Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress

Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress

Date: September 17, 2013
Creator: Grasso, Valerie Bailey
Description: This report covers concerns that Congress has expressed over U.S. acquisition of rare earth elements, particularly those used in various components of defense weapon systems. Specific concerns are the acquisition of these elements, especially from foreign sources such as China; how dependence of foreign sources affects national security; and methods for decreasing the relationship between reliance on foreign sources and national security.
Contributing Partner: UNT Libraries Government Documents Department
Rare Earth Elements: The Global Supply Chain

Rare Earth Elements: The Global Supply Chain

Date: September 30, 2010
Creator: Humphries, Marc
Description: The concentration of production of rare earth elements (REEs) outside the United States raises the important issue of supply vulnerability. REEs are used for new energy technologies and national security applications. This report provides a discussion on the major issues and concerns of the global supply chain for rare earth elements, their major end uses, and legislative and other policy proposals that Congress may consider to improve the U.S. rare earth position.
Contributing Partner: UNT Libraries Government Documents Department
Rare Earth Elements: The Global Supply Chain

Rare Earth Elements: The Global Supply Chain

Date: June 8, 2012
Creator: Humphries, Marc
Description: This report provides a discussion on the major issues and concerns of the global supply chain for rare earth elements, their major end uses, and legislative and other policy proposals that Congress may consider to improve the U.S. rare earth position. The concentration of production of rare earth elements (REEs) outside the United States raises the important issue of supply vulnerability, since they are used for new energy technologies and national security applications.
Contributing Partner: UNT Libraries Government Documents Department
Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress

Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress

Date: June 8, 2011
Creator: Bailey Grasso, Valerie
Description: This report covers concerns that Congress has expresses over U.S. acquisition of rare earth elements, particularly those used in various components of defense weapon systems. Specific concerns are the acquisition of these elements, especially from foreign sources such as China; how dependence of foreign sources affects national security; and methods for decreasing the relationship between reliance on foreign sources and national security.
Contributing Partner: UNT Libraries Government Documents Department
Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress

Rare Earth Elements in National Defense: Background, Oversight Issues, and Options for Congress

Date: March 31, 2011
Creator: Bailey Grasso, Valerie
Description: This report covers concerns that Congress has expressed over U.S. acquisition of rare earth elements, particularly those used in various components of defense weapon systems. Specific concerns are the acquisition of these elements, especially from foreign sources such as China; how dependence of foreign sources affects national security; and methods for decreasing the relationship between reliance on foreign sources and national security.
Contributing Partner: UNT Libraries Government Documents Department
Control of toxic metallic emissions formed during the combustion of Ohio coals. Final report, September 1, 1993--August 31, 1994

Control of toxic metallic emissions formed during the combustion of Ohio coals. Final report, September 1, 1993--August 31, 1994

Date: February 1, 1995
Creator: Biswas, P.; Owens, T.M. & Wu, Chang-Yu
Description: The objective of the project was to characterize metallic emissions from representative coals and develop strategies for their control. Though metallic emissions from coal combustors have been extensively studied, more studies need to be performed to better characterize the interaction of various species which is required for the selection and design of sorbents for effective control of these emissions. Some coals are rich in sulfur, and utilities using these coals will have to use some form of Flue Gas Desulfurization (FGD). A technique for FGD is the use of calcium based sorbents, and the degree of metals capture of these sorbents under different conditions will be researched. The objective of the first year of the study was to understand the evolution of metallic aerosol size distributions and the capture characteristics of various sorbents. Also, the metallic emissions resulting from the combustion of two seams of Ohio coals were to be characterized. Studies on the evolution of the metallic aerosol size distributions have been completed and the use of silicon and calcium based sorbents for capture of lead species has been examined. Co-injection of metallic compounds along with organometallic silicon indicated a high degree of capture of lead in a certain ...
Contributing Partner: UNT Libraries Government Documents Department
Selenium emission control at high temperatures with mineral sorbents, Final report, September 1, 1993--August 13, 1994

Selenium emission control at high temperatures with mineral sorbents, Final report, September 1, 1993--August 13, 1994

Date: February 1, 1995
Creator: Fan, L.S.; Ghost-Dastidar, A.; Mahuli, S. & Agnihotri, R.
Description: The focus of this project is on toxic heavy metal removal by sorbent injection in the upper-furnace region of a coal-fired boiler. Selenium is chosen as the candidate heavy metal to be studied because of its high volatility and associated difficulty in removal. The preliminary sorbent screening experiments were performed in a differential reactor, built in the first year of this project. A host of sorbents, such as, alumina, kaotinite, limestone and also hydrated lime were tested at a reaction temperature of 900{degrees}C, and for reaction duration of 4 hrs. The reason for choosing these minerals was because of their proven moderate to high capability of lead and cadmium capture, and also for moderate selenium capture at high temperatures, reported by recent studies. The sorbent screening experiments have used selenium dioxide as the Se source, since in the oxidizing atmosphere of the furnace, that is reported to be the existing form of selenium species. The preliminary sorbent screening experiments have shown that Ca(OH){sub 2} is the most promising sorbent for selenium capture out of all the sorbents tested. A careful review of the sorption results for Ca(OH){sub 2} has also revealed the strong possibility for occurrence of a chemical reaction. ...
Contributing Partner: UNT Libraries Government Documents Department
Creep Resistant Zinc Alloy

Creep Resistant Zinc Alloy

Date: December 31, 2002
Creator: Goodwin, Frank E.
Description: This report covers the development of Hot Chamber Die Castable Zinc Alloys with High Creep Strengths. This project commenced in 2000, with the primary objective of developing a hot chamber zinc die-casting alloy, capable of satisfactory service at 140 C. The core objectives of the development program were to: (1) fill in missing alloy data areas and develop a more complete empirical model of the influence of alloy composition on creep strength and other selected properties, and (2) based on the results from this model, examine promising alloy composition areas, for further development and for meeting the property combination targets, with the view to designing an optimized alloy composition. The target properties identified by ILZRO for an improved creep resistant zinc die-casting alloy were identified as follows: (1) temperature capability of 1470 C; (2) creep stress of 31 MPa (4500 psi); (3) exposure time of 1000 hours; and (4) maximum creep elongation under these conditions of 1%. The project was broadly divided into three tasks: (1) Task 1--General and Modeling, covering Experimental design of a first batch of alloys, alloy preparation and characterization. (2) Task 2--Refinement and Optimization, covering Experimental design of a second batch of alloys. (3) Task 3--Creep ...
Contributing Partner: UNT Libraries Government Documents Department
Oxidation of Al-containing austenitic stainless steels as related to the formation of strong glass-ceramic to metal seals

Oxidation of Al-containing austenitic stainless steels as related to the formation of strong glass-ceramic to metal seals

Date: August 1, 1996
Creator: Moddeman, W.E.; Birkbeck, J.C.; Bowling, W.C.; Burke, A.R. & Cassidy, R.T.
Description: In glass-ceramic to metal seals used in pyrotechnic actuators and ignitors, Ni-based alloys and Al-containing austenitic stainless steels are used. Metal attack by the glass is severe if Ni based alloys are used, less so for the Al-containing alloys. In this paper, lithia-alumina-silica glass-ceramic was sealed to Al-containing alloys that were first oxidized prior to sealing (preoxidation). Results show that this preoxidation substantially reduces the probability of glass/metal reactions during seal formation, thus improving the overall quality of the interface without loss of seal bond strength. Mechanism of surface oxide formation of these Al- containing steels is discussed. Auger data show the composition of the resulting oxides to be a function of oxidation temperature. There are two theories on the oxidation mechanism: (1) oxidation occurring at the air/oxide interface (Abderrazik et al, 1987), and (2) oxidation taking place at the oxide/metal interface (Hindam and Smeltzer, 1980). To test the theories, oxidation of the Al-containing alloys was carried out, first in pure oxygen-16, and then followed by pure oxygen-18. SIMS showed no layered structure, but did show a mixture of oxides. Thus, the oxidation mechanism is not simple and must be allowing oxygen to have access at all stages of the ...
Contributing Partner: UNT Libraries Government Documents Department
Analytical laboratory and mobile sampling platform. Progress report, January 1, 1995--March 31, 1995

Analytical laboratory and mobile sampling platform. Progress report, January 1, 1995--March 31, 1995

Date: May 1, 1995
Creator: Stetzenbach, K.
Description: Rock samples from Nevada, including tuff samples from the Yucca Mountain area, were analyzed. Analytical results are presented.
Contributing Partner: UNT Libraries Government Documents Department
Analytical electron microscopy of rapidly solidified metals

Analytical electron microscopy of rapidly solidified metals

Date: December 1991
Creator: Kelly, T. F.; Holzman, L. M.; Shin, K.; Kim, Y. W.; Bae, J. C.; Flinn, J. E. et al.
Description: Examples of the need to characterize rapidly solidified metals on submicron scale are given for centrifugally atomized steel powder and electrohydrodynamically atomized submicron spheres. Materials studied include Fe-40wt% Ni, 304 SS, Fe-20at.%Co, and pure V.
Contributing Partner: UNT Libraries Government Documents Department
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