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Accelerated Testing of the CSNF Waste Form: Applicability to Yucca Mountain
Spent fuel tests in support of Yucca Mountain have been performed for many years. Most of these tests have been either single-pass flowthrough (SPFT) or unsaturated drip tests that have been used to elucidate waste form degradation rates. In general, the tests have been considered accelerated tests per the definition found in ASTM Standard C1174 in that either the temperature or flow rate has been increased in order to increase the rate of alteration. However, as the design and models for the proposed repository have solidified, it is clear that much of what was originally considered an accelerated test is, in reality, either a service condition test or a test that determines bounding conditions that grossly overestimate radionuclide degradation and release rates under repository relevant conditions. This presentation will examine the factors that need to be considered for future waste form, including waste package internals, degradation tests.
Date:
January 11, 2005
Creator:
Hanson, B.; Buck, E. & Brady, P.
Object Type:
Report
System:
The UNT Digital Library
Altus Times (Altus, Okla.), Vol. 106, No. 237, Ed. 1 Tuesday, January 11, 2005
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 11, 2005
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Appropriations for FY2005: Labor, Health and Human Services, and Education
This report tracks the legislative progress of the FY2005 appropriations for the Departments of Labor, Health and Human Services, and Education, and Related Agencies (L-HHS-ED).
Date:
January 11, 2005
Creator:
Irwin, Paul M.
Object Type:
Report
System:
The UNT Digital Library
Assessing Consumer Values and the Supply-Chain Market for the Integrated Water Heater/Dehumidifier
This paper presents a case study of the potential market for the dual-service residential integrated water heater/dehumidifier (WHD). Its principal purpose is to evaluate the extent to which this integrated appliance might penetrate the residential market sector, given current market trends, producer and consumer attributes, and technical parameters. The report's secondary purpose is to gather background information leading to a generic framework for conducting market analyses of technologies. This framework can be used to assess market readiness as well as factor preferred product attributes into the design to drive consumer demand for this product. This study also supports analysis for prototype design. A full market analysis for potential commercialization should be conducted after prototype development. The integrated WHD is essentially a heat-pump water heater (HPWH) with components and controls that allow dedicated dehumidification. Adequate residential humidity control is a growing issue for newly constructed residential homes, which are insulated so well that mechanical ventilation may be necessary to meet fresh air requirements. Leveraging its successful experience with the energy-efficient design improvement for the residential HPWH, the Oak Ridge National Laboratory's (ORNL's) Engineering Science and Technology Division's (ESTD's) Building Equipment Group designed a water-heating appliance that combines HPWH efficiency with dedicated …
Date:
January 11, 2005
Creator:
Ashdown, BG
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 84, No. 38, Ed. 1 Tuesday, January 11, 2005
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
January 11, 2005
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Boerne Star & Hill Country Recorder (Boerne, Tex.), Vol. 98, No. 96, Ed. 1 Tuesday, January 11, 2005
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
January 11, 2005
Creator:
Watson, Steven G.
Object Type:
Newspaper
System:
The Portal to Texas History
Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Tuesday, January 11, 2005
Semiweekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
January 11, 2005
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
Calendars of the House of Representatives
This is a report on the Calendars of the house of representatives.
Date:
January 11, 2005
Creator:
Davis, Christopher M.
Object Type:
Report
System:
The UNT Digital Library
Calendars of the House of Representatives
In the House of Representatives, the term “calendar” has two related meanings. This fact sheet, one of a series of fact sheets on legislative process, explains calendars and their use in the House of Representatives.
Date:
January 11, 2005
Creator:
Davis, Christopher M.
Object Type:
Report
System:
The UNT Digital Library
China-U.S. Relations During the 108th Congress
This report discusses the background and overview of the China-U.S. relations, Key Issues during the 108th congress, U.S. Policy Trends and China's space program.
Date:
January 11, 2005
Creator:
Dumbaugh, Kerry
Object Type:
Report
System:
The UNT Digital Library
Coefficient of Thermal Expansion of the Beta and Delta Polymorphs of HMX
Dimensional changes related to temperature cycling of the {beta} and {delta} polymorphs of HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) are important for a variety of applications. The coefficient of thermal expansion (CTE) of the {beta} and {delta} phases are measured over a temperature range of -20 C to 215 C by thermo-mechanical analysis (TMA). Dimensional changes associated with the phase transition were also measured, and the time-temperature dependence of the dimensional change is consistent with phase transition kinetics measured earlier by differential scanning calorimetry (DSC). One HMX sample measured by TMA during its initial heating and again three days later during a second heating showed the {beta}-to-{delta} phase transition a second time, thereby indicating back conversion from {delta}-to-{beta} phase HMX during those three days. DSC was used to measure kinetics of the {delta}-to-{beta} back conversion. The most successful approach was to first heat the material to create the {delta} phase, then after a given period at room temperature, measure the heat absorbed during a second pass through the {beta}-to-{delta} phase transition. Back conversion at room temperature follows nucleation-growth kinetics.
Date:
January 11, 2005
Creator:
Weese, R K & Burnham, A K
Object Type:
Article
System:
The UNT Digital Library
The corrosion of UO2 versus ThO2: a quantum mechanical investigation
Quantum mechanical surface energy calculations have been performed on both uranium dioxide (UO{sub 2}) and thorium dioxide (ThO{sub 2}) (111), (110), and (100) surfaces to determine their relative reactivities. While UO{sub 2} and ThO{sub 2} both have the fluorite structure Fm3m, they differ in that uranium has two dominant oxidation states, U{sup 4+} and U{sup 6+}, while thorium only has one, Th{sup 4+}. Furthermore, UO{sub 2} is an intrinsically weak p-type semi-conductor with a band gap of 2.14 eV (Killeen, 1980), while ThO{sub 2} is an insulator. Dissolution and spectroscopic studies indicate that UO{sub 2} and ThO{sub 2} have different solubilities (Sunder and Miller, 2000). We use the quantum mechanical program, CASTEP (CAmbridge Scientific Total Energy Package) to perform surface and adsorption energy calculations on the (111) surface of both materials, with specific attention to O, H{sub 2}O, and combined adsorption cases. UO{sub 2} and ThO{sub 2} bulk unit cells were optimized to find the most stable configuration of atoms. Surface slabs were ''cleaved'' from the relaxed bulk for each orientation, placed in a 10 {angstrom} vacuum gap in order to simulate a free surface and were optimized. Relative surface energy trends and atomic relaxation were compared between the surfaces …
Date:
January 11, 2005
Creator:
Skomurski, F. N.; Shuller, L. C.; Becker, U. & Ewing, R. C.
Object Type:
Report
System:
The UNT Digital Library
Critical dimension sensitivity to post-exposure bake temperaturevariation in EUV photoresists
Chemically amplified resists depend upon the post-exposure bake (PEB) process to drive the deprotection reactions (in positive resists) that lead to proper resist development. For this reason they often exhibit critical dimension (CD) sensitivity to PEB temperature variation. In this work the effects of variation in different aspects of the PEB step on post-develop CD are studied for two extreme ultraviolet (EUV) photoresists. The spatial and temporal temperature uniformity of the PEB plate is measured using a wireless sensor wafer. Programmed variations in the bake plate temperature set point are then used to measure the CD sensitivity to steady state temperature variation. In addition, the initial temperature ramp time is modified using a thin sheet of polyimide film between the wafer and the bake plate. This allows for measurement of the CD sensitivity to transient temperature variation. Finally, the bake time is adjusted to measure the CD sensitivity to this parameter.
Date:
January 11, 2005
Creator:
Cain, Jason P.; Naulleau, Patrick & Spanos, Costas J.
Object Type:
Article
System:
The UNT Digital Library
Critical Infrastructure Protections: The 9/11 Commission Report and Congressional Response
This report provides the 9/11 Commission report and Congressional response regarding Critical Infrastructure protections.
Date:
January 11, 2005
Creator:
Moteff, John
Object Type:
Report
System:
The UNT Digital Library
Cross Sections for (Gamma)-Ray Production in the 191ir (N,Xn(Gamma)) Reactions
Discrete {gamma}-ray spectra have been measured for nuclei populated in {sup 191}Ir(n{sub 4}xn{gamma}) with x{<=}11, as a function of incident neutron energy using neutrons from the 'white' neutron source at the Los Alamos Neutron Science Center's WNR facility. The energy of the neutrons was determined using the time-of-flight technique. The data were taken using the GEANIE spectrometer. The cross sections for emission of 202 {gamma} rays of {sup 181-191}Ir were determined for neutron energies 0.2 MeV < E{sub n} < 300 MeV. Comparison with model calculations, using the GNASH reaction model, and with GEANIE results from the similar {sup 193}Ir(n{sub 4}xn{gamma}) reactions is made.
Date:
January 11, 2005
Creator:
Fotiades, N.; Nelson, R. O.; Devlin, M.; Chadwick, M. B.; Talou, P.; Becker, J. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Days Reserved for Special Business in the House
This report provides a table and general guidelines for business that has privileged consideration on specified days in the House of Representatives. It includes some information about related procedures.
Date:
January 11, 2005
Creator:
Saturno, James V.
Object Type:
Report
System:
The UNT Digital Library
DCODE.ORG Anthology of Comparative Genomic Tools
Comparative genomics provides the means to demarcate functional regions in anonymous DNA sequences. The successful application of this method to identifying novel genes is currently shifting to deciphering the noncoding encryption of gene regulation across genomes. To facilitate the use of comparative genomics to practical applications in genetics and genomics we have developed several analytical and visualization tools for the analysis of arbitrary sequences and whole genomes. These tools include two alignment tools: zPicture and Mulan; a phylogenetic shadowing tool: eShadow for identifying lineage- and species-specific functional elements; two evolutionary conserved transcription factor analysis tools: rVista and multiTF; a tool for extracting cis-regulatory modules governing the expression of co-regulated genes, CREME; and a dynamic portal to multiple vertebrate and invertebrate genome alignments, the ECR Browser. Here we briefly describe each one of these tools and provide specific examples on their practical applications. All the tools are publicly available at the http://www.dcode.org/ web site.
Date:
January 11, 2005
Creator:
Loots, G G & Ovcharenko, I
Object Type:
Article
System:
The UNT Digital Library
Ecuador: Political and Economic Situation and U.S. Relations
In January 2003, Lucio Gutierrez of the Patriotic Society Party (PSP), a former army Colonel who was part of the junta that toppled the government of Jamil Mahuad in January 2000, became the country’s sixth president in seven years. Early in his presidency, President Gutierrez abandoned his populist rhetoric and adopted some market-friendly economic reforms in order to secure support from the International Monetary Fund (IMF). His power was severely limited, however, by opposition parties that dominated the Congress, indigenous protests, and allegations of corruption.
Date:
January 11, 2005
Creator:
Ribando, Clare
Object Type:
Report
System:
The UNT Digital Library
Egypt-United States Relations
This report includes information about Egypt/United States relations, issues in these relations, and information regarding the United States' foreign assistance to Egypt
Date:
January 11, 2005
Creator:
Mark, Clyde R.
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Tuesday, January 11, 2005
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 11, 2005
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Fatigue failure in thin-film polysilicon is due to subcriticalcracking within the oxide layer
It has been established that microelectromechanical systems (MEMS) created from polycrystalline silicon thin-films are subject to cyclic fatigue. Prior work by the authors has suggested that although bulk silicon is not susceptible to fatigue failure in ambient air, fatigue in micron-scale silicon is a result of a ''reaction-layer'' process, whereby high stresses induce a thickening of the post-release oxide at stress concentrations such as notches, which subsequently undergoes moisture-assisted cracking. However, there exists some controversy regarding the post-release oxide thickness of the samples used in the prior study. In this Letter, we present data from devices from a more recent fabrication run that confirm our prior observations. Additionally, new data from tests in high vacuum show that these devices do not fatigue when oxidation and moisture are suppressed. Each of these observations lends credence to the '''reaction-layer'' mechanism. Recent advances in the design of microelectromechanical systems (MEMS) have increased the demand for more reliable microscale structures. Although silicon is an effective and widely used structural material at the microscale, it is very brittle. Consequently, reliability is a limiting factor for commercial and defense applications. Since the surface to volume ratio of these structural films is very large, classical models for …
Date:
January 11, 2005
Creator:
Alsem, D. H.; Muhlstein, C. L.; Stach, E. A. & Ritchie, R. O.
Object Type:
Article
System:
The UNT Digital Library
Federal Research and Development: Budgeting and Priority-Setting Issues, 108th Congress
None
Date:
January 11, 2005
Creator:
Knezo, Genevieve J.
Object Type:
Report
System:
The UNT Digital Library
Ferromagnetism in Ga1-xMnxP: evidence for inter-Mn exchangemediated bylocalized holes within a detached impurity band
We report an energy gap for hole photoexcitation in ferromagnetic Ga{sub 1-x}Mn{sub x}P that is tunable by Mn concentration (x {le} 0.06) and by compensation with Te donors. For x{approx}0.06, electrical transport is dominated by excitation across this gap above the Curie temperature (T{sub c}) of 60 K and by thermally-activated hopping below T{sub c}. Magnetization measurements reveal a moment of 3.9 {+-} 0.4 {micro}{sub B} per substitutional Mn while the large anomalous Hall signal unambiguously demonstrates that the ferromagnetism is carrier-mediated. In aggregate these data indicate that ferromagnetic exchange is mediated by holes localized in a Mn-derived band that is detached from the valence band.
Date:
January 11, 2005
Creator:
Scarpulla, M. A.; Cardozo, B. L.; Farshchi, R.; Hlaing Oo, W. M.; McCluskey, M. D.; Yu, K. M. et al.
Object Type:
Article
System:
The UNT Digital Library
Foreign Intelligence Surveillance Act: Selected Legislation from the 108th Congress
The Foreign Intelligence Surveillance Act, as passed in 1978, provided a statutory framework for the use of electronic surveillance in the context of foreign intelligence gathering. In doing so, Congress sought to strike a balance between national security interests and personal privacy rights. Subsequent legislation expanded federal laws dealing with foreign intelligence gathering to address physical searches, pen registers and trap and trace devices, and access to certain business records.
Date:
January 11, 2005
Creator:
Bazan, Elizabeth B.
Object Type:
Report
System:
The UNT Digital Library