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319,268 Matching Results
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Crystallization In High Level Waste (HLW) Glass Melters: Operational Experience From The Savannah River Site
processing strategy for the Hanford Tank Waste Treatment and Immobilization Plant (WTP). The basis of this alternative approach is an empirical model predicting the crystal accumulation in the WTP glass discharge riser and melter bottom as a function of glass composition, time, and temperature. When coupled with an associated operating limit (e.g., the maximum tolerable thickness of an accumulated layer of crystals), this model could then be integrated into the process control algorithms to formulate crystal tolerant high level waste (HLW) glasses targeting higher waste loadings while still meeting process related limits and melter lifetime expectancies. This report provides a review of the scaled melter testing that was completed in support of the Defense Waste Processing Facility (DWPF) melter. Testing with scaled melters provided the data to define the DWPF operating limits to avoid bulk (volume) crystallization in the un-agitated DWPF melter and provided the data to distinguish between spinels generated by K-3 refractory corrosion versus spinels that precipitated from the HLW glass melt pool. This report includes a review of the crystallization observed with the scaled melters and the full scale DWPF melters (DWPF Melter 1 and DWPF Melter 2). Examples of actual DWPF melter attainment with Melter 2 …
Date:
February 27, 2014
Creator:
Fox, K. M.
Object Type:
Report
System:
The UNT Digital Library
Recent BaBar Studies of Bottomonium States
None
Date:
February 27, 2014
Creator:
Guido, Elisa
Object Type:
Article
System:
The UNT Digital Library
Measurements of Anti-B /to D(*) Tau- Anti-Nu/Tau And |V(Ub)| at BaBar
None
Date:
February 26, 2014
Creator:
Sevilla, Manuel Franco
Object Type:
Article
System:
The UNT Digital Library
Recent BaBar Charm Physics Results
None
Date:
February 26, 2014
Creator:
Martinelli, Maurizio
Object Type:
Article
System:
The UNT Digital Library
Recent BaBar Measurements of Hadronic B Branching Fractions
None
Date:
February 26, 2014
Creator:
Gaz, Alessandro
Object Type:
Article
System:
The UNT Digital Library
Searches for Rare and Forbidden B and Charm Decays at the BaBar Experiment
None
Date:
February 26, 2014
Creator:
Grauges, Eugeni
Object Type:
Article
System:
The UNT Digital Library
Sol-Gel Based Polybenzimidazole Membranes for Hydrogen Pumping Devices
Electrochemical hydrogen pumping using a high temperature (>100°C) PBI membrane was demonstrated under non-humidified and humidified conditions at ambient pressures. Relatively low voltages were required to operate the pump over a wide range of hydrogen flow rates. The advantages of the high temperature capability were shown by operating the pump on reformate feed gas mixtures containing various amounts of CO and CO{sub 2}. Gas purity measurements on the cathode gas product were conducted and significant reductions in gas impurities were detected. The applicability of the PBI membrane for electrochemical hydrogen pumping and its durability under typical operating conditions was established with tests that lasted for nearly 4000 hours.
Date:
February 26, 2014
Creator:
Benicewicz, Brian
Object Type:
Report
System:
The UNT Digital Library
Three-Dimensional Surface Geophysical Exploration of the 200-Series Tanks at the 241-C Tank Farm
A surface geophysical exploration (SGE) survey using direct current electrical resistivity was conducted within the C Tank Farm in the vicinity of the 200-Series tanks at the Hanford Site near Richland, Washington. This survey was the second successful SGE survey to utilize the Geotection(TM)-180 Resistivity Monitoring System which facilitated a much larger survey size and faster data acquisition rate. The primary objective of the C Tank Farm SGE survey was to provide geophysical data and subsurface imaging results to support the Phase 2 RCRA Facility Investigation, as outlined in the Phase 2 RCRA Facility Investigation / Corrective Measures work plan RPP-PLAN-39114.
Date:
February 26, 2014
Creator:
Crook, N.; McNeill, M.; Dunham, Ralph & Glaser, Danney R.
Object Type:
Report
System:
The UNT Digital Library
CRADA Final Report For CRADA NO. CR-12-006 [Operation and Testing of an SO{sub 2}-depolarized Electrolyzer (SDE) for the Purpose of Hydrogen and Sulfuric Acid Production]
Over the past several years, Savannah River National Laboratory (SRNL) has led a team of collaborators under the Department of Energy’s (DOE) nuclear hydrogen production program to develop the Hybrid Sulfur (HyS) Process. HyS is a 2-step water-splitting process consisting of high temperature decomposition of sulfuric acid to generate SO{sub 2}, followed by the electrolysis of aqueous SO{sub 2} to generate hydrogen and sulfuric acid. The latter is fed back into the high temperature reactor. SRNL designed and built an SO{sub 2}-depolarized electrolyzer (SDE) and a test facility. Over 40 SDE’s were tested using different catalysts, membranes and other components. SRNL demonstrated that an SDE could be operated continuously for approximately 200 hours under certain conditions without buildup of sulfur at the SDE’s cathode, thus solving a key technical problem with SDE technology. Air Products and Chemicals, Inc. (APCI) is a major supplier of hydrogen production systems, and they have proprietary technology that could benefit from the SDE developed by SRNS, or some improved version thereof. However, to demonstrate that SRNL’s SDE is a truly viable approach to the electrolyzer design, continuous operation for far greater periods of time than 200 hours must be demonstrated, and the electrolyzer must be …
Date:
February 24, 2014
Creator:
Summers, W. A.; Colon-Mercado, H. R.; Steimke, J. L. & Zahn, Steffen
Object Type:
Report
System:
The UNT Digital Library
Electron g-2 in Light-Front Quantization
None
Date:
February 24, 2014
Creator:
Zhao, Xingbo; Honkanen, Heli; Maris, Pieter; Vary, James P. & Brodsky, Stanley J.
Object Type:
Article
System:
The UNT Digital Library
Computational Nanophotonics: Model Optical Interactions and Transport in Tailored Nanosystem Architectures
The program is directed toward development of new computational approaches to photoprocesses in nanostructures whose geometry and composition are tailored to obtain desirable optical responses. The emphasis of this specific program is on the development of computational methods and prediction and computational theory of new phenomena of optical energy transfer and transformation on the extreme nanoscale (down to a few nanometers).
Date:
February 21, 2014
Creator:
Stockman, Mark & Gray, Steven
Object Type:
Report
System:
The UNT Digital Library
Energy Saving Melting and Revert Reduction Technology (Energy-SMARRT): Surface/Near Surface Indication - Characterization of Surface Anomalies from Magnetic Particle and Liquid Penetrant Indications
The systematic study and characterization of surface indications has never been conducted. Producers and users of castings do not have any data on which they can reliably communicate the nature of these indications or their effect on the performance of parts. Clearly, the ultimate intent of any work in this area is to eliminate indications that do in fact degrade properties. However, it may be impractical physically and/or financially to eliminate all surface imperfections. This project focused on the ones that actually degrade properties. The initial work was to identify those that degrade properties. Accurate numerical simulations of casting service performance allow designers to use the geometric flexibility of castings and the superior properties of steel to produce lighter weight and more energy efficient components for transportation systems (cars and trucks), construction, and mining. Accurate simulations increase the net melting energy efficiency by improving casting yield and reducing rework and scrap. Conservatively assuming a 10% improvement in yield, approximately 1.33 x 1012 BTU/year can be saved with this technology. In addition, CO2 emissions will be reduced by approximately 117,050 tons per year.
Date:
February 20, 2014
Creator:
Griffin, John
Object Type:
Report
System:
The UNT Digital Library
The BlackHat Library for One-Loop Amplitudes
None
Date:
February 19, 2014
Creator:
Bern, Z.; Dixon, L. J.; Cordero, F. Febres; Hoeche, S.; Ita, H.; Kosower, D. A. et al.
Object Type:
Article
System:
The UNT Digital Library
CDMSlite: A Search for Low-Mass WIMPs using Voltage-Assisted Calorimetric Ionization Detection in the SuperCDMS Experiment
None
Date:
February 19, 2014
Creator:
Agnese, R.; Anderson, A. J.; Asai, M.; Balakishiyeva, D.; Thakur, R. Basu; Bauer, D. A. et al.
Object Type:
Article
System:
The UNT Digital Library
The four-loop remainder function and multi-Regge behavior at NNLLA in planar N=4 super-Yang-Mills theory
None
Date:
February 19, 2014
Creator:
Dixon, Lance J.; Drummond, James M.; Duhr, Claude & Pennington, Jeffrey
Object Type:
Article
System:
The UNT Digital Library
FY13 Progress Report on the Phase I Mini-SHINE Water Irradiations and Micro-SHINE Irradiations
None
Date:
February 19, 2014
Creator:
Youker, A. J.; Krebs, J. F.; Kalensky, M.; Tkac, P.; Chemerisov, S. & Vandegrift, G. F. (Chemical Sciences and Engineering Division)
Object Type:
Report
System:
The UNT Digital Library
Ntuples for NLO events at Hadron Colliders
None
Date:
February 19, 2014
Creator:
Bern, Z.; Dixon, L.J.; Cordero, F.Febres; Hoeche, S.; Ita, H.; Kosower, D.A. et al.
Object Type:
Article
System:
The UNT Digital Library
Organic Matter Composition, Recycling Susceptibility, and the Effectiveness of the Biological Pump – An Evaluation Using NMR Spectra of Marine Plankton
Carbon (C) sequestration through fertilization of phytoplankton with micronutrients and enhancement of the absorption and retention of atmospheric C by ocean biota heavily depends on the efficiency of the “biological pump”. The long-term effectiveness of this strategy depends on a net transfer of C from the upper ocean-atmosphere system to the deep ocean where the C is removed from contact with the atmosphere for an extended period of time. This C removal can be equated to the amount of C fixation by phytoplankton minus the C cycling and regeneration in the euphotic zone. If the regeneration efficiency is increased, then despite increased C fixation, no net loss (sequestration) of C will result. A reduction in cycling efficiency in the euphotic zone, on the other hand, will increase the effectiveness of the “biological pump” and thus C sequestration. The degree of organic matter biodegradation and recycling depends on the “reactivity” of compounds synthesized by the biota, which in turn, is controlled by the structural characteristic of these compounds. There is considerable evidence that different phytoplankton taxa differ substantially in their biogeochemical characteristics and it is likely that the relative abundance of different compounds synthesized by these distinct taxa, and even within …
Date:
February 19, 2014
Creator:
Paytan, Adina
Object Type:
Report
System:
The UNT Digital Library
Recovery of Mo for Accelerator Production of Mo-99 Using (y,n) Reaction on Mo-100
None
Date:
February 19, 2014
Creator:
Tkac, P.; Vandegrift, G. F.; Nunn, S. D. & Harvey, J.
Object Type:
Report
System:
The UNT Digital Library
Uranium Anodic Dissolution under Slightly Alkaline Conditions Progress Report Full-Scale Demonstration with DU Foil
None
Date:
February 18, 2014
Creator:
Gelis, A.; Brown, M.A.; Wiedmeyer, S. & Vandegrift, G.F. (Chemical Sciences and Engineering Division)
Object Type:
Report
System:
The UNT Digital Library
Beam Transport Testing for the Production Accelerator Arrangement
This describes the beam transfer system about the electron beam into the target.
Date:
February 14, 2014
Creator:
Gromov, R. & Chemerisov, S. (Chemical Sciences and Engineering Division)
Object Type:
Report
System:
The UNT Digital Library
Hanford Site Anuran Monitoring Report for Calendar Year 2013
The U.S. Department of Energy, Richland Operations Office (DOE-RL) conducts ecological monitoring on the Hanford Site to collect and track data needed to ensure compliance with an array of environmental laws, regulations, and policies governing DOE activities. Ecological monitoring data provide baseline information about the plants, animals, and habitat under DOE-RL stewardship at Hanford required for decision-making under the National Environmental Policy Act (NEPA) and Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The Hanford Site Comprehensive Land Use Plan (CLUP, DOE/EIS-0222-F) which is the Environmental Impact Statement for Hanford Site activities, helps ensure that DOE-RL, its contractors, and other entities conducting activities on the Hanford Site are in compliance with NEPA.
Date:
February 13, 2014
Creator:
Wilde, Justin W.; Johnson, Scott J. & Lindsey, Cole T.
Object Type:
Report
System:
The UNT Digital Library
Hanford Site Black-Tailed Jackrabbit Monitoring Report for Fiscal Year 2013
The U.S. Department of Energy, Richland Operations Office (DOE-RL) conducts ecological monitoring on the Hanford Site to collect and track data needed to ensure compliance with an array of environmental laws, regulations, and policies governing DOE activities. Ecological monitoring data provide baseline information about the plants, animals, and habitat under DOE-RL stewardship at Hanford required for decision-making under the National Environmental Policy Act (NEPA) and Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The Hanford Site Comprehensive Land Use Plan (CLUP, DOE/EIS-0222-F) which is the Environmental Impact Statement for Hanford Site activities, helps ensure that DOE-RL, its contractors, and other entities conducting activities on the Hanford Site are in compliance with NEPA.
Date:
February 13, 2014
Creator:
Lindsey, Cole T.; Nugent, John J.; Wilde, Justin W. & Johnson, Scott J.
Object Type:
Report
System:
The UNT Digital Library
Hanford Site Raptor Nest Monitoring Report for Calendar Year 2013
The U.S. Department of Energy, Richland Operations Office (DOE-RL) conducts ecological monitoring on the Hanford Site to collect and track data needed to ensure compliance with an array of environmental laws, regulations, and policies governing DOE activities. Ecological monitoring data provide baseline information about the plants, animals, and habitat under DOE-RL stewardship at Hanford required for decision-making under the National Environmental Policy Act (NEPA) and Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The Hanford Site Comprehensive Land Use Plan (CLUP, DOE/EIS-0222-F) which is the Environmental Impact Statement for Hanford Site activities, helps ensure that DOE-RL, its contractors, and other entities conducting activities on the Hanford Site are in compliance with NEPA.
Date:
February 13, 2014
Creator:
Nugent, John J.; Lindsey, Cole T. & Wilde, Justin W.
Object Type:
Report
System:
The UNT Digital Library