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1,104 Matching Results
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HIGH ALUMINUM HLW (HIGH LEVEL WASTE ) GLASSES FOR HANFORDS WTP (WASTE TREATMENT PROJECT)
This paper presents the results of glass formulation development and melter testing to identify high waste loading glasses to treat high-Al high level waste (HLW) at Hanford. Previous glass formulations developed for this HLW had high waste loadings but their processing rates were lower that desired. The present work was aimed at improving the glass processing rate while maintaining high waste loadings. Glass formulations were designed, prepared at crucible-scale and characterized to determine their properties relevant to processing and product quality. Glass formulations that met these requirements were screened for melt rates using small-scale tests. The small-scale melt rate screening included vertical gradient furnace (VGF) and direct feed consumption (DFC) melter tests. Based on the results of these tests, modified glass formulations were developed and selected for larger scale melter tests to determine their processing rate. Melter tests were conducted on the DuraMelter 100 (DMIOO) with a melt surface area of 0.11 m{sup 2} and the DuraMelter 1200 (DMI200) HLW Pilot Melter with a melt surface area of 1.2 m{sup 2}. The newly developed glass formulations had waste loadings as high as 50 wt%, with corresponding Al{sub 2}O{sub 3} concentration in the glass of 26.63 wt%. The new glass formulations …
Date:
January 4, 2010
Creator:
AA, KRUGER; BW, BOWAN; I, JOSEPH; H, GAN; WK, KOT; KS, MATLACK et al.
Object Type:
Article
System:
The UNT Digital Library
MELT RATE ENHANCEMENT FOR HIGH ALUMINUM HLW (HIGH LEVEL WASTE) GLASS FORMULATION FINAL REPORT 08R1360-1
This report describes the development and testing of new glass formulations for high aluminum waste streams that achieve high waste loadings while maintaining high processing rates. The testing was based on the compositions of Hanford High Level Waste (HLW) with limiting concentrations of aluminum specified by the Office of River Protection (ORP). The testing identified glass formulations that optimize waste loading and waste processing rate while meeting all processing and product quality requirements. The work included preparation and characterization of crucible melts and small scale melt rate screening tests. The results were used to select compositions for subsequent testing in a DuraMelter 100 (DM100) system. These tests were used to determine processing rates for the selected formulations as well as to examine the effects of increased glass processing temperature, and the form of aluminum in the waste simulant. Finally, one of the formulations was selected for large-scale confirmatory testing on the HLW Pilot Melter (DM1200), which is a one third scale prototype of the Hanford Tank Waste Treatment and Immobilization Plant (WTP) HLW melter and off-gas treatment system. This work builds on previous work performed at the Vitreous State Laboratory (VSL) for Department of Energy (DOE) to increase waste loading …
Date:
January 4, 2010
Creator:
AA, KRUGER; KS, MATLACK; W, KOT; IL, PEGG; I, JOSEPH; T, BARDAKCI et al.
Object Type:
Report
System:
The UNT Digital Library
Measurement of the Differential Cross-Sections of Inclusive, Prompt And Non-Prompt $J/\psi$ Production in Proton-Proton Collisions at $\sqrt{s}=7$ TeV
None
Date:
June 4, 2013
Creator:
Aad, Georges
Object Type:
Article
System:
The UNT Digital Library
Measurement of the 8B Solar Neutrino Flux with KamLAND
We report a measurement of the neutrino-electron elastic scattering rate from {sup 8}B solar neutrinos based on a 123 kton-day exposure of KamLAND. The background-subtracted electron recoil rate, above a 5.5-MeV analysis threshold is 1.49 {+-} 0.14(stat) {+-} 0.17(syst) events per kton-day. Interpreted as due to a pure electron flavor flux with a {sup 8}B neutrino spectrum, this corresponds to a spectrum integrated flux of 2.77 {+-} 0.26(stat) {+-} 0.32(syst) x 10{sup 6} cm{sup -2}s{sup -1}. The analysis threshold is driven by {sup 208}Tl present in the liquid scintillator, and the main source of systematic uncertainty is due to background from cosmogenic {sup 11}Be. The measured rate is consistent with existing measurements and with standard solar model predictions which include matter-enhanced neutrino oscillation.
Date:
June 4, 2011
Creator:
Abe, S.; Furuno, K.; Gando, A.; Gando, Y.; Ichimura, K.; Ikeda, H. et al.
Object Type:
Article
System:
The UNT Digital Library
Anisotropies in the Diffuse Gamma-Ray Background Measured By the Fermi LAT
None
Date:
April 4, 2013
Creator:
Ackermann, M.; Ajello, M.; Albert, A.; Baldini, L.; Ballet, J.; Barbiellini, G. et al.
Object Type:
Article
System:
The UNT Digital Library
DEMONSTRATION OF MIXING AND TRANSFERRING SETTLING COHESIVE SLURRY SIMULANTS IN THE AY-102 TANK
In support of Hanford's waste certification and delivery of tank waste to the Waste Treatment and Immobilization Plant (WTP), Savannah River National Laboratory (SRNL) was tasked by the Washington River Protection Solutions (WRPS) to evaluate the effectiveness of mixing and transferring tank waste in a Double Shell Tank (DST) to the WTP Receipt Tank. The work discussed in this report (Phase III) address the impacts cohesive simulants have on mixing and batch transfer performance. The objective of the demonstrations performed in Phase III was to determine the impact that cohesive particle interactions in the simulants have on tank mixing using 1/22{sup nd} scale mixing system and batch transfer of seed particles. This testing is intended to provide supporting evidence to the assumption that Hanford Small Scale Mixing Demonstration (SSMD) testing in water is conservative. The batch transfers were made by pumping the simulants from the Mixing Demonstration Tank (MDT) to six Receipt Tanks (RTs), and the consistency in the amount of seed particles in each batch was compared. Tests were conducted with non-Newtonian cohesive simulants with Bingham yield stress ranging from 0.3 Pa to 7 Pa. Kaolin clay and 100 {mu}m stainless steel seed particles were used for all the …
Date:
August 4, 2011
Creator:
Adamson, D.
Object Type:
Report
System:
The UNT Digital Library
Construction Method Study for Installation of a Large Riser in a Single-Shell Tank
This study evaluates and identifies a construction method for cutting a hole in a single-shell tank dome. This study also identifies and evaluates vendors for performing the cut.
Date:
August 4, 2010
Creator:
Adkisson, D. A.
Object Type:
Report
System:
The UNT Digital Library
Positron PWFA Simulations for FACET
None
Date:
February 4, 2013
Creator:
Adli, E.; Corde, S.; England, R. J.; Frederico, J. T.; Gessner, S. J.; Hogan, M. J. et al.
Object Type:
Article
System:
The UNT Digital Library
Transatlantic Regulatory Cooperation: A Possible Role for Congress
This report focuses on the creation of the Transatlantic Economic Council; the role of legislatures in the regulatory process; and the Transatlantic Legislators' Dialogue and its new role as an advisor to transatlantic regulatory efforts.
Date:
January 4, 2010
Creator:
Ahearn, Raymond J. & Morelli, Vincent
Object Type:
Report
System:
The UNT Digital Library
Results from a Low-Energy Analysis of the CDMS II Germanium Data
None
Date:
June 4, 2012
Creator:
Ahmed, Z.; Akerib, D. S.; Arrenberg, S.; Bailey, C. N.; Balakishiyeva, D.; Baudis, L. et al.
Object Type:
Article
System:
The UNT Digital Library
Search for Inelastic Dark Matter with the CDMS II Experiment
None
Date:
June 4, 2012
Creator:
Ahmed, Z.; Akerib, D. S.; Arrenberg, S.; Bailey, C. N.; Balakishiyeva, D.; Baudis, L. et al.
Object Type:
Article
System:
The UNT Digital Library
Characteristics of Divertor Heat and Particle Deposition with Intrinsic and Applied 3-D Fields in NSTX H-mode Plasmas
None
Date:
June 4, 2010
Creator:
Ahn, J. W.; Canik, J.; Maingi, R.; Grey, T. K.; Lore, J. D.; McLean, A. G. et al.
Object Type:
Article
System:
The UNT Digital Library
A Low-threshold Analysis of CDMS Shallow-site Data
Data taken during the final shallow-site run of the first tower of the Cryogenic Dark Matter Search (CDMS II) detectors have been reanalyzed with improved sensitivity to small energy depositions. Four {approx}224 g germanium and two {approx}105 g silicon detectors were operated at the Stanford Underground Facility (SUF) between December 2001 and June 2002, yielding 118 live days of raw exposure. Three of the germanium and both silicon detectors were analyzed with a new low-threshold technique, making it possible to lower the germanium and silicon analysis thresholds down to the actual trigger thresholds of {approx}1 and {approx}2 keV, respectively. Limits on the spin-independent cross section for weakly interacting massive particles (WIMPs) to elastically scatter from nuclei based on these data exclude interesting parameter space for WIMPs with masses below 9 GeV/c{sup 2}. Under standard halo assumptions, these data partially exclude parameter space favored by interpretations of the DAMA/LIBRA and CoGeNT experiments data as WIMP signals, and exclude new parameter space for WIMP masses between 3 and 4 GeV/c{sup 2}.
Date:
June 4, 2012
Creator:
Akerib, D. S.; Attisha, M. J.; Baudis, L.; Bauer, D. A.; Bolozdynya, A. I.; Brink, P. L. et al.
Object Type:
Article
System:
The UNT Digital Library
Transatlantic Trade and Investment Partnership (TTIP) Negotiations
This report provides: (1) context for the Transatlantic Trade and Investment Partnership (TTIP) negotiations; (2) analysis of possible trade and investment issues in the negotiations; and (3) discussion of issues for Congress. The U.S.-EU negotiations on TTIP are not public, however, the information and analysis in this report on issues in the negotiations are based on publicly-available information.
Date:
February 4, 2014
Creator:
Akhtar, Shayerah Ilias & Jones, Vivian C.
Object Type:
Report
System:
The UNT Digital Library
U.S. Trade and Investment in the Middle East and North Africa: Overview and Issues for Congress
This report provides background and analysis for policymakers considering re-evaluating U.S. trade and investment in the Middle East and North Africa (MENA) region in light of recent political developments. In particular, the report examines the economic challenges facing many countries in the region and the area's limited integration in the world economy, including relatively weak economic ties with the United States. It also analyzes various policy options for increasing trade and investment with MENA countries. The report concludes by discussing: 1) the premise of the policy agenda, specifically whether increased trade and investment can support or lead to successful democratic transitions and political stability; and 2) if such a policy agenda is pursued, possible implementation questions that policymakers in Congress and the Administration may face.
Date:
March 4, 2013
Creator:
Akhtar, Shayerah Ilias; Bolle, Mary Jane & Nelson, Rebecca M.
Object Type:
Report
System:
The UNT Digital Library
A Regional Seismic Array of Three-Component Stations in Central Saudi Arabia
None
Date:
May 4, 2011
Creator:
Al-Amri, A.; Harris, D.; Fnais, M.; Rodgers, A. & Hemaida, M.
Object Type:
Article
System:
The UNT Digital Library
Study of Abnormal Vertical Emittance Growth in ATF Extraction Line
Since several years, the vertical beam emittance measured in the Extraction Line (EXT) of the Accelerator Test Facility (ATF) at KEK, that will transport the electron beam from the ATF Damping Ring (DR) to the future ATF2 Final Focus beam line, is significantly larger than the emittance measured in the DR itself, and there are indications that it grows rapidly with increasing beam intensity. This longstanding problem has motivated studies of possible sources of this anomalous emittance growth. One possible contribution is non-linear magnetic fields in the extraction region experimented by the beam while passing off-axis through magnets of the DR during the extraction process. In this paper, simulations of the emittance growth are presented and compared to observations. These simulations include the effects of predicted non-linear field errors in the shared DR magnets and orbit displacements from the reference orbit in the extraction region. Results of recent measurements using closed orbit bumps to probe the relation between the extraction trajectory and the anomalous emittance growth are also presented.
Date:
November 4, 2011
Creator:
Alabau, M.; Faus-Golfe, A.; /Valencia U., IFIC; Alabau, M.; Bambade, P.; Brossard, J. et al.
Object Type:
Article
System:
The UNT Digital Library
The 2010 Oil Spill: The Minerals Management Service (MMS) and the National Environmental Policy Act (NEPA)
This report will review environmental procedures after an exploratory oil well in the Gulf of Mexico exploded, killing 11 people and causing an oil spill.
Date:
June 4, 2010
Creator:
Alexander, Kristina
Object Type:
Report
System:
The UNT Digital Library
2011 GASEOUS IONS GORDON RESEARCH CONFERENCE
The Gaseous Ions: Structures, Energetics and Reactions Gordon Research Conference will focus on ions and their interactions with molecules, surfaces, electrons, and light. The conference will cover theory and experiments, and systems ranging from molecular to biological to clusters to materials. The meeting goal continues to be bringing together scientists interested in fundamentals, with those applying fundamental phenomena to a wide range of practical problems. Each of the ten conference sessions will focus on a topic within this spectrum, and there will also be poster sessions for contributed papers, with sufficient space and time to allow all participants to present their latest results. To encourage active participation by young investigators, about ten of the poster abstracts will be selected for 15 minute 'hot topic' talks during the conference sessions. Hot topic selection will be done about a month before the meeting. Funds should be available to offset the participation cost for young investigators.
Date:
March 4, 2011
Creator:
Anderson, Scott
Object Type:
Article
System:
The UNT Digital Library
The European Parliament
This report provides background on the Congress-European Parliament (EP) relationship and the role of the Transatlantic Legislators' Dialogue (TLD). It also explores potential future options that coukd strengthen ties between the two bodies.
Date:
February 4, 2014
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
European Union Enlargement
This report discusses the evolution of the European Union and its process for enlargement. The EU has long viewed the enlargement process as an historic opportunity to further the integration of the continent by peaceful means.
Date:
February 4, 2013
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
European Union Enlargement
The European Union (EU) has long viewed the enlargement process as an extraordinary opportunity to promote political stability and economic prosperity in Europe. U.S. Administrations and many Members of Congress have long backed EU enlargement, believing that it serves U.S. interests by advancing democracy and economic prosperity throughout the European continent. Some U.S. officials are concerned that "enlargement fatigue" as well as the EU's ongoing financial crisis could hinder EU expansion. The status of EU enlargement and its implications for both the EU itself and U.S.-EU relations may be of interest to the second session of the 112th Congress.
Date:
April 4, 2012
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
The European Union: Questions and Answers
This report serves as a primer on the EU and provides a brief description of U.S.-EU relations that may be of interest in the 113th Congress.
Date:
March 4, 2013
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library
The European Union: Questions and Answers
This report serves as a primer on the European Union and provides a brief description of U.S.-EU relations that may be of interest in the 114th Congress.
Date:
September 4, 2015
Creator:
Archick, Kristin
Object Type:
Report
System:
The UNT Digital Library