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THE USE OF POLYMERS IN RADIOACTIVE WASTE PROCESSING SYSTEMS

Description: The Savannah River Site (SRS), one of the largest U.S. Department of Energy (DOE) sites, has operated since the early 1950s. The early mission of the site was to produce critical nuclear materials for national defense. Many facilities have been constructed at the SRS over the years to process, stabilize and/or store radioactive waste and related materials. The primary materials of construction used in such facilities are inorganic (metals, concrete), but polymeric materials are inevitably used … more
Date: April 15, 2013
Creator: Skidmore, E. & Fondeur, F.
Partner: UNT Libraries Government Documents Department
open access

Black Branes in Flux Compactifications

Description: No Description Available.
Date: August 15, 2013
Creator: Torroba, Gonzalo & Wang, Huajia
Partner: UNT Libraries Government Documents Department
open access

Reionization Histories of Milky Way Mass Halos

Description: No Description Available.
Date: July 15, 2013
Creator: Li, Tony Y.; Alvarez, Marcelo A.; Wechsler, Risa H. & Abel, Tom
Partner: UNT Libraries Government Documents Department
open access

Technitium Management at the Hanford Site

Description: The Hanford tank waste contains -26,000 Ci of technetium-99 (Tc-99), the majority of which is in the supernate fraction. Tc-99 is a long-lived radionuclide with a half-life of -212,000 years and, in its predominant pertechnetate (TcO{sub 4}) fonn, is highly soluble and very mobile in the vadose zone and ultimately the groundwater. Tc-99 is identified as the major dose contributor (in groundwater) by past Hanford site performance assessments and therefore considered a key radionuclide of concern… more
Date: August 15, 2013
Creator: Robbins, Rebecca A.
Partner: UNT Libraries Government Documents Department
open access

DISTRIBUTION OF LANTHANIDE AND ACTINIDE ELEMENTS BETWEEN BIS-(2-ETHYLHEXYL)PHOSPHORIC ACID AND BUFFERED LACTATE SOLUTIONS CONTAINING SELECTED COMPLEXANTS

Description: With the renewed interest in the closure of the nuclear fuel cycle, the TALSPEAK process is being considered for the separation of Am and Cm from the lanthanide fission products in a next generation reprocessing plant. However, an efficient separation requires tight control of the pH which likely will be difficult to achieve on a large scale. To address this issue, we measured the distribution of lanthanide and actinide elements between aqueous and organic phases in the presence of complexants … more
Date: April 15, 2013
Creator: Rudisill, Tracy S.; Diprete, David P. & Thompson, Major C.
Partner: UNT Libraries Government Documents Department
open access

Deep Sludge Gas Release Event Analytical Evaluation

Description: The purpose of the Deep Sludge Gas Release Event Analytical Evaluation (DSGRE-AE) is to evaluate the postulated hypothesis that a hydrogen GRE may occur in Hanford tanks containing waste sludges at levels greater than previously experienced. There is a need to understand gas retention and release hazards in sludge beds which are 200 -300 inches deep. These sludge beds are deeper than historical Hanford sludge waste beds, and are created when waste is retrieved from older single-shell tanks (SST… more
Date: August 15, 2013
Creator: Sams, Terry L.
Partner: UNT Libraries Government Documents Department
open access

Single Electron Dynamic of Microwave Undulator

Description: No Description Available.
Date: October 15, 2013
Creator: Chang, C.; Neilson, J.; Pellegrini, C.; Shumail, M. & Tantawi, S. G.
Partner: UNT Libraries Government Documents Department
open access

Discovery of the First Leaking Double-Shell Tank - Hanford Tank 241-AY-102

Description: A routine video inspection of the annulus region of double-shell tank 241-A Y-102 in August of 2012 indicated the presence material in the annulus space between the primary and secondary liners. A comparison was made to previous inspections perfom1ed in 2006 and 2007. which indicated that a change had occurred. The material was observed at two locations on the floor of the annulus and one location at the top of the annulus region where the primary and secondary top knuckles meet (RPP-ASMT-53793… more
Date: August 15, 2013
Creator: Harrington, Stephanie J. & Sams, Terry L.
Partner: UNT Libraries Government Documents Department
open access

Massively Parallel Loading

Description: No Description Available.
Date: January 15, 2013
Creator: Frings, W.; Ahn, D. H.; LeGendre, M.; Gamblin, T.; de Supinski, B. R. & Wolf, F.
Partner: UNT Libraries Government Documents Department
open access

Optimal nitrogen application rates for three intensively-managed hardwood tree species in the southeastern USA.

Description: Forest production can be limited by nutrient and water availability, and tree species are expected to respond differently to fertilization and irrigation. Despite these common expectations, multi-species comparisons are rare, especially ones implementing a range of fertilization rates crossed with irrigation. This study compares the response of three forest hardwood species to numerous nitrogen (N) fertilization levels and water availability using a novel non-replicated technique. A range of N … more
Date: April 15, 2013
Creator: Coyle, David; Aubrey, Doug P.; Siry, Jacek P.; Volfovicz-Leon, Roberto R. & Coleman, Mark D.
Partner: UNT Libraries Government Documents Department
open access

Hanford and Savannah River Site Programmatic and Technical Integration

Description: The Hanford Site and the Savannah River Site (SRS) were the primary plutonium production facilities within the U.S. nuclear weapons complex. Radioactive wastes were generated as patt of these missions and are stored in similar fashion. The majority of radioactivity maintained by the two sites is located in underground carbon steel tanks in the physical form of supernatant, saltcake, or sludge. Disposition of SRS tank waste is ongoing by converting it into glass (pathway for sludge and radionucl… more
Date: August 15, 2013
Creator: Ramsey, William Gene
Partner: UNT Libraries Government Documents Department
open access

Multiphysics Applications of ACE3P

Description: No Description Available.
Date: October 15, 2013
Creator: Lee, Ki H.; Ko, Kwok; Li, Zenghai; Ng, Cho-Kuen; Xiao, Liling; Cheng, G. et al.
Partner: UNT Libraries Government Documents Department
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