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Corrosion and Creep of Candidate Alloys in High Temperature Helium and Steam Environments for the NGNP
This project aims to understand the processes by which candidate materials degrade in He and supercritical water/steam environments characteristic of the current NGNP design. We will focus on understanding the roles of temperature, and carbon and oxygen potential in the 750-850 degree C range on both uniform oxidation and selective internal oxidation along grain boundaries in alloys 617 and 800H in supercritical water in the temperature range 500-600 degree C; and examining the application of static and cyclic stresses in combination with impure He environments in the temperature rang 750-850 degree C; and examining the application of static and cyclic stresses in combination with impure He environments in the temperature range 750-850 degree C over a range of oxygen and carbon potentials in helium. Combined, these studies wil elucidate the potential high damage rate processes in environments and alloys relevant to the NGNP.
Date:
June 21, 2013
Creator:
Was, Gary & Jones, J. W.
Object Type:
Report
System:
The UNT Digital Library
Impacts of High Resolution Extreme Events on U.S. Energy Demand and CO{sub 2} Emissions in the 21st Century
Progress is reported in these areas: Validation of temperature and precipitation extremes; Time of emergence of severe heat stress in the United States; Quantifying the effects of temperature extremes on energy demand and carbon dioxide emissions.
Date:
June 21, 2013
Creator:
Diffenbaugh, Noah
Object Type:
Report
System:
The UNT Digital Library
Preparation and initial characterization of fluidized bed steam reforming pure-phase standards
Hanford is investigating the Fluidized Bed Steam Reforming (FBSR) process for their Low Activity Waste. The FBSR process offers a low-temperature continuous method by which liquid waste can be processed with the addition of clay into a sodium aluminosilicate (NAS) waste form. The NAS waste form is mainly comprised of nepheline (NaAlSiO{sub 4}), sodalite (Na{sub 8}[AlSiO{sub 4}]{sub 6}Cl{sub 2}), and nosean (Na{sub 8}[AlSiO{sub 4}]{sub 6}SO{sub 4}). Anions such as perrhenate (ReO{sub 4}{sup -}), pertechnetate (TcO{sub 4}{sup -}), and iodine (I{sup -}) are expected to replace sulfate in the nosean structure and/or chloride in the sodalite mineral structure (atomically bonded inside the aluminosilicate cages that these mineral structures possess). In the FBSR waste form, each of these phases can exist in a variety of solid solutions that differ from the idealized forms observed in single crystals in nature. The lack of understanding of the durability of these stoichiometric or idealized mineral phases complicates the ability to deconvolute the durability of the mixed phase FBSR product since it is a combination of different NAS phases. To better understand the behavior, fabrication and testing of the individual phases of the FBSR product is required. Analytical Development (AD) of the Science and Technology directorate …
Date:
March 21, 2013
Creator:
Missimer, D. M. & Rutherford, R. L.
Object Type:
Report
System:
The UNT Digital Library
Near-Field Effects of Cherenkov Radiation Induced By Ultra High Energy Cosmic Neutrinos
None
Date:
March 21, 2013
Creator:
Hu, Chia-Yu; /Taiwan, Natl. Taiwan U.; Chen, Chih-Ching; /Taiwan, Natl. Taiwan U.; Chen, Pisin & /Taiwan, Natl. Taiwan U. /KIPAC, Menlo Park
Object Type:
Article
System:
The UNT Digital Library
CP Violation in Belle/BaBar Part-2
None
Date:
May 21, 2013
Creator:
Yusa, Yosuke & Tech., /Virginia
Object Type:
Article
System:
The UNT Digital Library
COMPARISON OF RESULTS FOR QUARTER 2 SURFACE WATER SPLIT SAMPLES COLLECTED AT THE NUCLEAR FUEL SERVICES SITE, ERWIN, TENNESSEE
Oak Ridge Associated Universities (ORAU), under the Oak Ridge Institute for Science and Education (ORISE) contract, collected split surface water samples with Nuclear Fuel Services (NFS) representatives on November 15, 2012. Representatives from the U.S. Nuclear Regulatory Commission and Tennessee Department of Environment and Conservation were also in attendance. Samples were collected at four surface water stations, as required in the approved Request for Technical Assistance number 11-018. These stations included Nolichucky River upstream (NRU), Nolichucky River downstream (NRD), Martin Creek upstream (MCU), and Martin Creek downstream (MCD). Both ORAU and NFS performed gross alpha and gross beta analyses, and the results are compared using the duplicate error ratio (DER), also known as the normalized absolute difference. A DER {<=} 3 indicates that, at a 99% confidence interval, split sample results do not differ significantly when compared to their respective one standard deviation (sigma) uncertainty (ANSI N42.22). The NFS split sample report does not specify the confidence level of reported uncertainties (NFS 2012). Therefore, standard two sigma reporting is assumed and uncertainty values were divided by 1.96. In conclusion, all DER values were less than 3 and results are consistent with low (e.g., background) concentrations.
Date:
January 21, 2013
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Verification test suite for systems analysis tools
None
Date:
February 21, 2013
Creator:
Sumner, T.; Hu, R. & Fanning, T. H. (Nuclear Engineering Division)
Object Type:
Report
System:
The UNT Digital Library
SOLVENT DISPERSION AND FLOW METER CALCULATION RESULTS
Savannah River National Laboratory (SRNL) found that the dispersion numbers for the six combinations of CSSX:Next Generation Solvent (NGS) “blend” and pure NGS versus salt solution, caustic wash, and strip aqueous solutions are all good. The dispersion numbers are indications of processability with centrifugal contactors. A comparison of solvent physical and thermal properties shows that the Intek™ solvent flow meter in the plant has a reading biased high versus calibrated flow when NGS is used, versus the standard CSSX solvent. The flow meter, calibrated for CSSX solvent, is predicted to read 2.8 gpm of NGS in a case where the true flow of NGS is 2.16 gpm.
Date:
June 21, 2013
Creator:
Nash, C.; Fondeur, F. & Peters, T.
Object Type:
Report
System:
The UNT Digital Library
Final Technical Report-the Ecology and Genomics of co2 Fixatiion in Oceanic River Plumes
Oceanic river plumes represent some of the most productive environments on Earth. As major conduits for freshwater and nutrients into the coastal ocean, their impact on water column ecosystems extend for up to a thousand km into oligotrophic oceans. Upon entry into the oceans rivers are tremendous sources of CO2 and dissolved inorganic carbon (DIC). Yet owing to increased light transmissivity from sediment deposition coupled with the influx of nutrients, dramatic CO2 drawdown occurs, and plumes rapidly become sinks for CO2. Using state-of-the-art gene expression technology, we have examined the molecular biodiversity of CO2 fixation in the Mississippi River Plume (MRP; two research cruises) and the Orinoco River Plume (ORP; one cruise). When the MRP extends far into the Gulf because of entrainment with the Loop Current, MRP production (carbon fixation) can account for up to 41% of the surface production in the Gulf of Mexico. Nearer-shore plume stations (“high plume,” salinity< 32 ppt) had tremendous CO2 drawdown that was correlated to heterokont (principally diatom) carbon fixation gene expression. The principal form of nitrogen for this production based upon 15N studies was urea, believed to be from anthropogenic origin (fertilizer) from the MRP watershed. Intermediate plume environments (salinity 34 ppt) …
Date:
June 21, 2013
Creator:
Paul, John H.
Object Type:
Report
System:
The UNT Digital Library
Particle Control and Plasma Performance in the Lithium Tokamak Experiment (LTX)
The Lithium Tokamak eXperiment (LTX) is a small, low aspect ratio tokamak, which is fitted with a stainless steel-clad copper liner, conformal to the last closed flux surface. The liner can be heated to 350{degree}C. Several gas fueling systems, including supersonic gas injection, and molecular cluster injection have been studied, and produce fueling efficiencies up to 35%. Discharges are strongly affected by wall conditioning. Discharges without lithium wall coatings are limited to plasma currents of order 10 kA, and discharge durations of order 5 msec. With solid lithium coatings discharge currents exceed 70 kA, and discharge durations exceed 30 msec. Heating the lithium wall coating, however, results in a prompt degradation of the discharge, at the melting point of lithium. These results suggest that the simplest approach to implementing liquid lithium walls in a tokamak - thin, evaporated, liquefied coatings of lithium - does not produce an adequately clean surface.
Date:
February 21, 2013
Creator:
Majeski, Richard Majeski; Abrams, T.; Boyle, D.; Granstedt, E.; Hare, J.; Jacobson, C. M. et al.
Object Type:
Report
System:
The UNT Digital Library
Solving The Long-Standing Problem Of Low-Energy Nuclear Reactions At The Highest Microscopic Level:Annual Continuation And Progress Report
None
Date:
February 21, 2013
Creator:
Quaglioni, S
Object Type:
Report
System:
The UNT Digital Library
SuperB Detector Technical Design Report
None
Date:
June 21, 2013
Creator:
Baszczyk, M.; Dorosz, P.; Kolodziej, J.; Kucewicz, W.; Sapor, M.; Jeremie, A. et al.
Object Type:
Article
System:
The UNT Digital Library
Fast MAP Search for Compact Additive Tree Ensembles (CATE)
None
Date:
March 21, 2013
Creator:
Prenger, R J; Chen, B Y; Marlatt, T L & Merl, D M
Object Type:
Report
System:
The UNT Digital Library
The Greensheet (Fort Worth, Tex.), Vol. 36, No. 327, Ed. 1 Thursday, February 21, 2013
Free weekly newspaper that includes business and classified advertising.
Date:
February 21, 2013
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Fort Worth, Tex.), Vol. 36, No. 354, Ed. 1 Thursday, March 21, 2013
Free weekly newspaper that includes business and classified advertising.
Date:
March 21, 2013
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Fort Worth, Tex.), Vol. 36, No. 355, Ed. 1 Thursday, March 21, 2013
Free weekly newspaper that includes business and classified advertising.
Date:
March 21, 2013
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Arlington-Grand Prairie, Tex.), Vol. 36, No. 353, Ed. 1 Thursday, March 21, 2013
Free weekly newspaper that includes business and classified advertising.
Date:
March 21, 2013
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Arlington-Grand Prairie, Tex.), Vol. 36, No. 325, Ed. 1 Thursday, February 21, 2013
Free weekly newspaper that includes business and classified advertising.
Date:
February 21, 2013
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Fort Worth, Tex.), Vol. 36, No. 326, Ed. 1 Thursday, February 21, 2013
Free weekly newspaper that includes business and classified advertising.
Date:
February 21, 2013
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Flammability Analysis For Actinide Oxides Packaged In 9975 Shipping Containers
Packaging options are evaluated for compliance with safety requirements for shipment of mixed actinide oxides packaged in a 9975 Primary Containment Vessel (PCV). Radiolytic gas generation rates, PCV internal gas pressures, and shipping windows (times to reach unacceptable gas compositions or pressures after closure of the PCV) are calculated for shipment of a 9975 PCV containing a plastic bottle filled with plutonium and uranium oxides with a selected isotopic composition. G-values for radiolytic hydrogen generation from adsorbed moisture are estimated from the results of gas generation tests for plutonium oxide and uranium oxide doped with curium-244. The radiolytic generation of hydrogen from the plastic bottle is calculated using a geometric model for alpha particle deposition in the bottle wall. The temperature of the PCV during shipment is estimated from the results of finite element heat transfer analyses.
Date:
March 21, 2013
Creator:
Laurinat, James E.; Askew, Neal M. & Hensel, Steve J.
Object Type:
Article
System:
The UNT Digital Library
DHS-STEM Summer Internship Report
None
Date:
August 21, 2013
Creator:
Harrison, S E
Object Type:
Report
System:
The UNT Digital Library
TwitterVane Administrators Guide
This document serves as the TwitterVane Administrators Guide. It describes how to control, monitor, and maintain Tweet Stream and Tweet processing for the TwitterVane web application.
Date:
February 21, 2013
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
Search for Pair Production of First Or Second Generation Leptoquarks in Proton-Proton Collisions at sqrt(s)=7 TeV using the ATLAS detector at the LHC
None
Date:
May 21, 2013
Creator:
Aad, Georges
Object Type:
Article
System:
The UNT Digital Library
Evaporator Feed Qualification Analysis Of Tank 38H And 43H Samples: January 2010 Through April 2013
This report provides the results of analyses that focused on the chemical species that pertain to the sodium aluminosilicate formation potential for archived Tank 38H and 43H subsurface samples from January 2010 through April 2013. Analyses included warm acid strike preparation followed by analysis of silicon, aluminum, and sodium and water dilution preparation followed by analysis for anions. The Tank 43H and 38H supernatant liquid silicon measurements for the January 2010 through April 2013 time period exhibit a slight increasing trend. Over this time period, the silicon concentration in the Tank 43H and Tank 38H samples averaged 179 mg/L and 235 mg/L, respectively. Comparison of Tank 43H sample results from 2005 through April 2013 to the previously developed process control models indicates that the current formation of sodium aluminosilicate in the 2H system is due to the seeded direct precipitation of cancrinite and sodalite.
Date:
August 21, 2013
Creator:
Martino, C. J. & Coleman, C. J.
Object Type:
Report
System:
The UNT Digital Library