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Metal waste forms from treatment of EBR-II spent fuel.
Demonstration of Argonne National Laboratory's electrometallurgical treatment of spent nuclear fuel is currently being conducted on irradiated, metallic driver fuel and blanket fuel elements from the Experimental Breeder Reactor-II (EBR-II) in Idaho. The residual metallic material from the electrometallurgical treatment process is consolidated into an ingot, the metal waste form (MWF), by employing an induction furnace in a hot cell. Scanning electron microscopy (SEM) and chemical analyses have been performed on irradiated cladding hulls from the driver fuel, and on samples from the alloy ingots. This paper presents the microstructures of the radioactive ingots and compares them with observations on simulated waste forms prepared using non-irradiated material. These simulated waste forms have the baseline composition of stainless steel - 15 wt % zirconium (SS-15Zr). Additions of noble metal elements, which serve as surrogates for fission products, and actinides are made to that baseline composition. The partitioning of noble metal and actinide elements into alloy phases and the role of zirconium for incorporating these elements is discussed in this paper.
Date:
May 18, 1998
Creator:
Abraham, D. P.
Object Type:
Article
System:
The UNT Digital Library
Performance of Ultra Hard Carbon Wear Coatings on Microgears Fabricated by Liga
Stiction and friction are of concern for the reliable, long-term application of Ni-alloy micromachines. We have found that the application of a 30-70 nm hard carbon coating produces a significant reduction in the friction coefficient and wear rate of electroformed Ni substrates in reciprocating sliding contact under simulated MEMS operating conditions. To evaluate the performance of coated components, a series of 70-pm-thick microgears ranging in diameter from 0.2 to 2.2 mm were fabricated from electroformed Ni via standard LIGA processes and fixtured on posts in preparation for the coating procedure. A pulsed vacuum- arc deposition process was used to deposit a carbon coating on the gears with the plasma incident at a shallow angle to the gears' top surface. A sample bias of -2 keV was used in order to produce a coating with relatively low stress and good adhesion while maintaining high hardness. This coating process is known to be somewhat comformal to the component surfaces. The coating uniformity, particularly in the high-aspect-ratio areas between the gear teeth, was evaluated with micro-Raman spectroscopy. It is shown that the coating can be applied uniformly on the top gear surface. Between the gear teeth the coating was the same thickness as …
Date:
December 18, 1998
Creator:
Ager, J. W., III; Brown, I. G.; Christenson, T. R.; Dugger, M. T.; Follstaedt, D. M.; Knapp, J. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Report to users of ATLAS - September 1998.
The ATLAS facility has provided a total of 5749 hours of beam for research in FY1998. The accelerator operation had a very high 93% reliability factor during that period. With the startup of Gammasphere in January, our schedule has attempted to minimize scheduled downtime and maximize beam-time for research. Our best performance so far occurred during the month of May when a total of 639 hours was provided for research. From the accelerator point-of-view, recent major highlights have included first operation of a new production configuration for our {sup 17}F beams which increased the beam current on-target to 2 x 10{sup 6} {sup 17}F ions/see. The {sup 17}F production target was moved approximately 4 meters upstream and a new superconducting solenoid was added to the system to refocus the highly divergent secondary beam. This new location also places the target upstream of a new superconducting resonator which was used to reduce the energy spread of the beam delivered to the spectrograph to less than 300 keV (FWHM). An improved, liquid nitrogen cooled, multiple gas cell has also significantly contributed to better performance.
Date:
November 18, 1998
Creator:
Ahmad, I. & Hofman, D.
Object Type:
Report
System:
The UNT Digital Library
The scrounge-atron: a proton radiography demonstration accelerator
The Scrounge-atron is a concept that could provide a demonstration accelerator for proton radiography. As discussed here, the Scrounge-atron would be capable of providing a 20 GeV beam of ten pulses, 10{sup 11} protons each, spaced 250 ns apart. This beam could be delivered once every minute to a single-axis radiographic station centered at the BEEF facility of the Nevada Test Site. These parameters would be sufficient to demonstrate, in five years, the capabilities of a proton-based Advanced Hydrotest Facility, and could return valuable information to the stockpile program, information that could not be obtained in any other way. The Scrounge-atron could be built in two to three years for $50-100 million. To meet this schedule and cost, the Scrounge-atron would rely heavily on the availability of components from the decommissioned Fermilab Main Ring.
Date:
December 18, 1998
Creator:
Alford, O. J.; Barnes, P. D.; Chargin, A. K.; Hartouni, E. F.; Hockman, J. N.; Moore, T. L. et al.
Object Type:
Report
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 5, Ed. 1 Tuesday, August 18, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
August 18, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 27, Ed. 1 Friday, September 18, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
September 18, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 69, Ed. 1 Wednesday, November 18, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
November 18, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
"Each One" series explores art education
A newspaper clipping, written by Melanie Allison for Arts & Entertainment, titled "Each One" series explores art education, The article is about the "Each One Teach One" weekly series of cultural presentations by the Center for Cultural Diversity presented by Dr. William McCarter, who will speak about life of artist and art educator John Biggers. McCarter wants to make people aware of their culture and how the role of artists in the culture reflects time and place.
Date:
February 18, 1998
Creator:
Allison, Melaine
Object Type:
Clipping
System:
The UNT Digital Library
IN SITU INFRARED STUDY OF CATALYTIC DECOMPOSITION OF NO
The growing concerns for the environment and increasingly stringent standards for NO emission have presented a major challenge to control NO emissions from electric utility plants and automobiles. Catalytic decomposition of NO is the most attractive approach for the control of NO emission for its simplicity. Successful development of an effective catalyst for NO decomposition will greatly decrease the equipment and operation cost of NO control. Due to lack of understanding of the mechanism of NO decomposition, efforts on the search of an effective catalyst have been unsuccessful. Scientific development of an effective catalyst requires fundamental understanding of the nature of active site, the rate-limiting step, and an approach to prolong the life of the catalyst. Research is proposed to study the reactivity of adsorbates for the direct NO decomposition and to investigate the feasibility of two novel approaches for improving catalyst activity and resistance to sintering. The first approach is the use of silanation to stabilize metal crystallites and supports for Cu-ZSM-5 and promoted Pt catalysts; the second is utilization of oxygen spillover and desorption to enhance NO decomposition activity. An innovative infrared reactor system will be used to observe and determine the dynamic behavior and the reactivity of …
Date:
August 18, 1998
Creator:
Almusaiteer, Khalid; Krishnanurthy, Ram & Chuang, Steven S. C.
Object Type:
Report
System:
The UNT Digital Library
Effect of MST on Crystallinity of CST/Sludge Glasses
In support of the Salt Disposition team, the effects of monosodium titanate (MST) on two glass formulations were investigated. These glass formulations combined a blend-type sludge with Crystalline Silicotitanate (CST) and glass formers (or frit). The objective of the testing was to determine if the MST would lead to crystal formation in the glasses.
Date:
November 18, 1998
Creator:
Andrews, M.K.
Object Type:
Report
System:
The UNT Digital Library
Results of the DWPF Melter Drain Canister, S00209
The Savannah River Technology Center (SRTC) was requested by the Engineering Section of the Defense Waste Processing Facility (DWPF) to characterize the drain canister filled during the DWPF Proficiency Runs. Testing of this canister, along with testing of the glass samples taken from the canister, was performed as part of a continuing effort to demonstrate compliance with the Waste Acceptance Product Specifications (WAPS)1 as outlined in the Waste Form Qualification Coordinating Plan (QCP).2. This report is a summary of the results of the canister filled with glass from the melter drain valve during the DWPF Proficiency Runs. This summary includes the results necessary for Waste Qualification, as well as results and observations from other SRTC tests.
Date:
September 18, 1998
Creator:
Andrews, M.K.
Object Type:
Report
System:
The UNT Digital Library
University Press (Beaumont, Tex.), Vol. 74, No. 34, Ed. 1 Wednesday, February 18, 1998
Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local, national, and campus news along with advertising.
Date:
February 18, 1998
Creator:
Andris, Tonya
Object Type:
Newspaper
System:
The Portal to Texas History
Vocational Education: Legislation to Reauthorize the Carl D. Perkins Vocational and Applied Technology Education Act
This report presents background on the Carl D. Perkins Vocational and Applied Technology Education Act, rovides a funding history of the Act, and tracks and analyzes legislation during the 105th Congress to revise and reauthorize the Perkins Act.
Date:
May 18, 1998
Creator:
Apling, Richard N.
Object Type:
Report
System:
The UNT Digital Library
Vocational Education: Legislation to Reauthorize the Carl D. Perkins Vocational and Applied Technology Education Act
This report presents background on the Carl D. Perkins Vocational and Applied Technology Education Act, provides a funding history of the Act, and tracks and analyzes legislation during the 105 Congress to revise and reauthorize the Perkins Act. Specifically the report th examines H.R. 1853 as passed by the House and H.R. 1385 as passed by the Senate. Key issues include whether and how to change state and substate formulas; what percentage of funds to reserve for statewide activities and administration; and how best to ensure services for “special populations,” such as students with disabilities. The report will be updated as legislative action warrants.
Date:
May 18, 1998
Creator:
Apling, Richard N.
Object Type:
Report
System:
The UNT Digital Library
Archer County News (Archer City, Tex.), No. 25, Ed. 1 Thursday, June 18, 1998
Weekly newspaper from Archer City, Texas that includes local, state and national news along with advertising.
Date:
June 18, 1998
Creator:
Armstrong, Sonny
Object Type:
Newspaper
System:
The Portal to Texas History
Ion Beam Induced Charge Collection (IBICC) from Integrated Circuit Test Structures Using a 10 MeV Carbon Microbeam
As future sizes of Integrated Circuits (ICs) continue to shrink the sensitivity of these devices, particularly SRAMs and DRAMs, to natural radiation is increasing. In this paper, the Ion Beam Induced Charge Collection (IBICC) technique is utilized to simulate neutron-induced Si recoil effects in ICS. The IBICC measurements, conducted at the Sandia National Laboratories employed a 10 MeV carbon microbeam with 1pm diameter spot to scan test structures on specifically designed ICS. With the aid of layout information, an analysis of the charge collection efficiency from different test areas is presented. In the present work a 10 MeV Carbon high-resolution microbeam was used to demonstrate the differential charge collection efficiency in ICS with the aid of the IC design Information. When ions strike outside the FET, the charge was only measured on the outer ring, and decreased with strike distance from this diode. When ions directly strike the inner and ring diodes, the collected charge was localized to these diodes. The charge for ions striking the gate region was shared between the inner and ring diodes. I The IBICC measurements directly confirmed the interpretations made in the earlier work.
Date:
November 18, 1998
Creator:
Aton, T.J.; Doyle, B.L.; Duggan, J.L.; El Bouanani, M.; Guo, B.N.; McDaniel, F.D. et al.
Object Type:
Article
System:
The UNT Digital Library
Radiographic simulations and analysis for ASCI
In this paper, the authors describe their work on developing quantitatively accurate radiographic simulation and analysis tools for ASCI hydro codes. they have extended the ability of HADES, the code which simulates radiography through a mesh, to treat the complex meshes used in ASCI calculations. The ultimate goal is to allow direct comparison between experimental radiographs and full physics simulated radiographs of ASCI calculations. They describe the ray-tracing algorithm they have developed for fast, accurate simulation of dynamic radiographs with the meshes used in ALE3D, an LLNL ASCI code. Spectral effects and material compositions are included. In addition to the newness of the mesh types, the distributed nature of domain decomposed problems requires special treatment by the radiographic code. Because of the size of such problems, they have parallelized the radiographic simulation, in order to have quick turnaround time. presently, this is done using the domain decomposition from the hydro code. They demonstrate good parallel scaling as the size of the problem is increased. They show a comparison between an experimental radiograph of a high explosive detonation and a simulated radiograph of an ALE3D calculation. They conclude with a discussion of future work.
Date:
December 18, 1998
Creator:
Aufderheide, M.; Stone, D. & VonWittenau, A.
Object Type:
Article
System:
The UNT Digital Library
Modeling the interacting detonation fronts observed by low energy radiography
We have completed a series of experiments in which we made radiographs of interacting detonation fronts in a high explosive. Although the fronts and interactions were observed, the experimental data were insufficient to distinguish between two computer models which we employed to simulate the experiments.
Date:
September 18, 1998
Creator:
Aufderheide, M; Egan, P O; Morgan, D L & Vantine, H C
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Melvin R. Baird, 1998
Access:
Use of this item is restricted to the UNT Community
Interview with Navy veteran Melvin R. "Pancho" Baird. It includes a combination of interviewing and reading from Baird's personal correspondence about his pre-World War II experiences with the U.S. Asiatic Fleet and his later experiences in the Pacific Theater during World War II. Baird talks about his stationing aboard the destroyer USS Alden as a radioman, the grounding of the SS President Hoover off of Hoishito Island, the Sino-Japanese War, liberty ashore various Asian port cities, events on the South China Patrol, civilian activities after his discharge, activities as a radio technician on Blue Beach during the Okinawan Campaign, kamikaze actions on Okinawa, and typical shipboard routine.
Date:
August 18, 1998
Creator:
Baird, James & Baird, Melvin R.
Object Type:
Book
System:
The UNT Digital Library
Design for Ceramic Membrane Reactor with two Reactant Gases at Different Pressures
The invention is a ceramic membrane reactor for syngas production having a reaction chamber, an inlet in the reactor for natural gas intake, a plurality of oxygen permeating ceramic slabs inside the reaction chamber with each slab having a plurality of passages paralleling the gas flow for transporting air through the reaction chamber, a manifold affixed to one end of the reaction chamber for intake of air connected to the slabs, a second manifold affixed to the reactor for removing the oxygen depleted air, and an outlet in the reaction chamber for removing syngas.
Date:
November 18, 1998
Creator:
Balachandran, Uthamalingam & Mieville, Rodney L.
Object Type:
Patent
System:
The UNT Digital Library
News Bulletin (Castroville, Tex.), Vol. 39, No. 25, Ed. 1 Thursday, June 18, 1998
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
June 18, 1998
Creator:
Barnes, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Imploding Liner Material Strength Measurements at High-Strain and High Strain Rate
Imploding, cylindrical liners provide a unique, shockless means of simultaneously accessing high strain and high-strain-rate for measurement of strength of materials in plastic flow. The radial convergence in the liner geometry results in the liner thickening as the circumference becomes smaller. Strains of up to {approximately}1.25 and strain rates of up to {approximately}10{sup 6} sec{sup -1} can be readily achieved in a material sample placed inside of an aluminum driver liner, using the Pegasus II capacitor bank. This provides yield strength data at conditions where none presently exists. The heating from work done against the yield strength is measured with multichannel pyrometry from infrared radiation emitted by the material sample. The temperature data as a function of liner position are unfolded to give the yield strength along the strain, strain-rate trajectory. Proper design of the liner and sample configuration ensures that the current diffused into the sample adds negligible heating. An important issue, in this type of temperature measurement, is shielding of the pickup optics from other sources of radiation. At strains greater than those achievable on Pegasus, e.g. the LANL Atlas facility, some materials may be heated all the way to melt by this process. Recent data on 6061-T6 …
Date:
October 18, 1998
Creator:
Bartsch, R. R.; Lee, H.; Holtkamp, D.; Wright, B.; Stokes, J.; Morgan, D. et al.
Object Type:
Article
System:
The UNT Digital Library
YUCCA Mountain Project - Argonne National Laboratory, Annual Progress Report, FY 1997 for activity WP 1221 unsaturated drip condition testing of spent fuel and unsaturated dissolution tests of glass.
This document reports on the work done by the Nuclear Waste Management Section of the Chemical Technology Division of Argonne National Laboratory in the period of October 1996 through September 1997. Studies have been performed to evaluate the behavior of nuclear waste glass and spent fuel samples under the unsaturated conditions (low-volume water contact) that are likely to exist in the Yucca Mountain environment being considered as a potential site for a high-level waste repository. Tests with actinide-doped waste glasses, in progress for over 11 years, indicate that the transuranic element release is dominated by colloids that continuously form and span from the glass surface. The nature of the colloids that form in the glass and spent fuel testing programs is being investigated by dynamic light scattering to determine the size distribution, by autoradiography to determine the chemistry, and by zeta potential to measure the electrical properties of the colloids. Tests with UO{sub 2} have been ongoing for 12 years. They show that the oxidation of UO{sub 2} occurs rapidly, and the resulting paragenetic sequence of secondary phases forming on the sample surface is similar to that observed for uranium found in natural oxidizing environments. The reaction of spent fuel …
Date:
September 18, 1998
Creator:
Bates, J. K.; Buck, E. C.; Emery, J. W.; Finch, R. J.; Finn, P. A.; Fortner, J. et al.
Object Type:
Report
System:
The UNT Digital Library
Corrosion behavior of environmental assessment glass in product consistency tests of extended duration.
We have conducted static dissolution tests to study the corrosion behavior of the Environmental Assessment (EA) glass, which is the benchmark glass for high-level waste glasses being produced at US Department of Energy facilities. These tests were conducted to evaluate the behavior of the EA glass under the same long-term and accelerated test conditions that are being used to evaluate the corrosion of waste glasses. Tests were conducted at 90 C in a tuff groundwater solution at glass surface area/solution volume (WV) ratios of about 2000 and 20,000 m{sup {minus}1}. The glass dissolved at three distinct dissolution rates in tests conducted at 2000 m{sup {minus}1}. Based on the release of boron, dissolution within the first seven days occurred at a rate of about 0.65 g/(m{sup 2} {center_dot} d). The rate between seven and 70 days decreased to 0.009 g/(m{sup 2} {center_dot} d). An increase in the dissolution rate occurred at longer times after the precipitation of zeolite phases analcime, gmelinite, and an aluminum silicate base. The dissolution rate after phase formation was about 0.18 g/(m{sup 2} {center_dot} d). The formation of the same zeolite alteration phases occurred after about 20 days in tests at 20,000 m{sup {minus}}. The average dissolution …
Date:
November 18, 1998
Creator:
Bates, J.K.; Buck, E.C.; Ebert, W.L.; Luo, J.S. & Tam, S.W.
Object Type:
Report
System:
The UNT Digital Library