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Waste form development and characterization in pyrometallurgical treatment of spent nuclear fuel.
Electrometallurgical treatment is a compact, inexpensive method that is being developed at Argonne National Laboratory to deal with spent nuclear fuel, primarily metallic and oxide fuels. In this method, metallic nuclear fuel constituents are electrorefined in a molten salt to separate uranium from the rest of the spent fuel. Oxide and other fuels are subjected to appropriate head end steps to convert them to metallic form prior to electrorefining. The treatment process generates two kinds of high-level waste--a metallic and a ceramic waste. Isolation of these wastes has been developed as an integral part of the process. The wastes arise directly from the electrorefiner, and waste streams do not contain large quantities of solvent or other process fluids. Consequently, waste volumes are small and waste isolation processes can be compact and rapid. This paper briefly summarizes waste isolation processes then describes development and characterization of the two waste forms in more detail.
Date:
April 16, 1998
Creator:
Ackerman, J.
Object Type:
Article
System:
The UNT Digital Library
Tank waste information network system II (TWINS2) year 2000 compliance assurance plan
The scope of this plan includes the Tank Waste Information Network System II (TWINS2) that contains the following major components: Tank Characterization Database (TCD), Tank Vapor Database (TVD), Data Source Access (DSA), automated Tank Characterization Report, Best-Basis Inventory Model (BBIM), and Tracker (corrective action tracking) function. The automated Tank Characterization Report application currently in development also will reside on-the TWINS system as will the BBIM. Critical inputs to TWINS occur from the following databases: Labcore and SACS. Output does not occur from TWINS to these two databases.
Date:
April 16, 1998
Creator:
Adams, M.R.
Object Type:
Report
System:
The UNT Digital Library
Study of the high-j states in {sup 249}Cm.
The authors have performed the reaction {sup 248}Cm({sup 4}He, {sup 3}He) using 98.5-MeV alpha particles from the IUCF cyclotron to populate high-j states in {sup 249}Cm. A tentative assignment of the K{sub 17/2} component of the 1/2{sup +}[880] Nilsson state has been made.
Date:
July 16, 1998
Creator:
Ahmad, I.
Object Type:
Article
System:
The UNT Digital Library
Large-Signal Injection-Level Spectroscopy of Impurities in Silicon
Deep level defects in silicon are identified by measuring the recombination lifetime as a function of the injection level. The basic models for recombination at deep and shallow centers is developed. The defect used for the theoretical model is the well-known interstitial Fe ion in silicon. Data are presented on silicon samples ranging in defect content from intentionally Fe-doped samples to an ultra-pure float-zone grown sample. These data are analyzed in terms of the injection-level spectroscopy model.
Date:
October 16, 1998
Creator:
Ahrenkiel, R. K. & Johnston, S. W.
Object Type:
Article
System:
The UNT Digital Library
HAPs-Rx: Precombustion Removal of Hazardous Air Pollutant Precursors
CQ Inc. and its project team members--Howard University, PrepTech Inc., Fossil Fuel Sciences, the United States Geological Survey (USGS), and industry advisors--are applying mature coal cleaning and scientific principles to the new purpose of removing potentially hazardous air pollutants from coal. The team uniquely combines mineral processing, chemical engineering, and geochemical expertise. This project meets more than 11 goals of the U.S. Department of Energy (DOE), the National Energy Strategy, and the 1993 Climate Change Action Plan. During this project: (1) Equations were developed to predict the concentration of trace elements in as-mined and cleaned coals. These equations, which address both conventional and advanced cleaning processes, can be used to increase the removal of hazardous air pollutant precursors (HAPs) by existing cleaning plants and to improve the design of new cleaning plants. (2) A promising chemical method of removing mercury and other HAPs was developed. At bench-scale, mercury reductions of over 50 percent were achieved on coal that had already been cleaned by froth flotation. The processing cost of this technology is projected to be less than $3.00 per ton ($3.30 per tonne). (3) Projections were made of the average trace element concentration in cleaning plant solid waste streams from …
Date:
March 16, 1998
Creator:
Akers, David J. & Raleigh, Clifford E.
Object Type:
Report
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 25, Ed. 1 Wednesday, September 16, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
September 16, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 46, Ed. 1 Friday, October 16, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
October 16, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Vol. 83, No. 67, Ed. 1 Monday, November 16, 1998
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
November 16, 1998
Creator:
Allam, Heather
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Radiological background levels found on glass fiber filters used for low-level environmental surveillance air sampling
Environmental surveillance of low-level radioactive particles in air requires a thorough understanding of low-level techniques and air sample collection media. High-volume air sampling for radioactive particles around Lawrence Livermore National Laboratory (LLNL) employs glass-fiber filters that are analyzed for gross alpha and gross beta activity and for specific isotopes. This study was conducted to determine the activities of radionuclides contained in blank glass-fiber filters. Data from this study provided a partial explanation of differences between current reported concentrations of radionuclides in air and those reported historically when cellulose filters were used in the LLNL monitoring effort.
Date:
September 16, 1998
Creator:
Althouse, P. E.
Object Type:
Article
System:
The UNT Digital Library
Bigplate: an oblique angle explosive EOS test
Bigplate is an advanced explosive equation of state (EOS) test. It consists of a point detonator driving a large disc (100 mm radius) of explosive, which pushes a 0.5 mm thick copper or tantalum plate. The plate is observed by a five-beam Fabry-Perot interferometer, which has beams at 0, 10, 20,40 and 80 mm on the plate. A short Fabry gives the jump-off to high accuracy; a long Fabry runs out to I0-15 microsec. A detailed error analysis is given, with the final velocity measurements considered good to ±0.066 mm/microsec. Jump-offs are measured to 0.01-0.02 microsec. Spall is seen in all shots, which creates a time delay on both the first and second velocity plateaus. A 0.1 microsec delay in jump-off of unknown origin is also seen at 80 mm. In order of decreasing explosive ideality, the explosives tired have been LX-14, LX-04 and LX-17. To partially negate the time delays, the data and code runs are overlaid at each radial position between the first and second plateaus. Traditional JWL's model LX-14 and LX-04 within accuracy, but not so for LX-17. The spall may be partly modeled using the pmin model but high resolution zoning is required. At longer times, …
Date:
April 16, 1998
Creator:
Anderson, S; Avara, R; Fried, L; Janzen, J; McGuire, E; Souers, P C et al.
Object Type:
Report
System:
The UNT Digital Library
ELECTROMOTIVE FORCE, EMF (CELLS)
The voltage or electric potential difference across the terminals of a cell when no current is drawn from it. The emf of a cell is the sum of the electric potential differences (PDs) produced by a separation of charges (electrons or ions) that can occur at each phase boundary (or interface) in the cell. The magnitude of each PD depends on the chemical nature of the two contacting phases. Thus, at the interface between two different metals, some electrons will have moved from the metal with a higher free energy of electrons to the metal with a lower free energy of electrons. The resultant charge separation will produce a PD (just as charge separation produces a voltage across a capacitor) that, at equilibrium, exactly opposes further electron flow. Similarly, PDs can be produced when electrons partition across a metal/solution interface or metal/solid interface, and when ions partition across a solution/membrane/solution interface.
Date:
September 16, 1998
Creator:
Archer, M. D. & Feldberg, S. W.
Object Type:
Text
System:
The UNT Digital Library
[Photograph 2012.201.B0139.0154]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Norman's Tigers were a super team without a superstar."
Date:
March 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0254.0496]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Red Earth Festival
Photograph of a scene during the Red Earth Festival.
Date:
June 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Red Earth Festival
Photograph of a scene during the Red Earth Festival.
Date:
June 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Red Earth Festival
Photograph of a scene during the Red Earth Festival.
Date:
June 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Red Earth Festival
Photograph of a scene during the Red Earth Festival.
Date:
June 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Red Earth Festival
Photograph of a scene during the Red Earth Festival.
Date:
June 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Red Earth Festival
Photograph of a scene during the Red Earth Festival.
Date:
June 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Red Earth Festival
Photograph of a scene during the Red Earth Festival.
Date:
June 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Red Earth Festival
Photograph of a scene during the Red Earth Festival.
Date:
June 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Red Earth Festival
Photograph of a scene during the Red Earth Festival.
Date:
June 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Red Earth Festival
Photograph of a scene during the Red Earth Festival.
Date:
June 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Red Earth Festival
Photograph of a scene during the Red Earth Festival.
Date:
June 16, 1998
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History