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Development of a Waste Treatment Process to Deactivate Reactive Uranium Metal and Produce a Stable Waste Form

Description: This paper highlights the results of initial investigations conducted to support the development of an integrated treatment process to convert pyrophoric metallic uranium wastes to a non-pyrophoric waste that is acceptable for land disposal. Several dissolution systems were evaluated to determine their suitability to dissolve uranium metal and that yield a final waste form containing uranium specie(s) amenable to precipitation, stabilization, adsorption, or ion exchange. During initial studies,… more
Date: January 17, 2002
Creator: Gates-Anderson, D D; Laue, C A & Fitch, T E
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The SX Solver: A Computer Program for Analyzing Solvent-Extraction Equilibria: Version 3.0

Description: A new computer program, the SX Solver, has been developed to analyze solvent-extraction equilibria. The program operates out of Microsoft Excel and uses the built-in Solver function to minimize the sum of the square of the residuals between measured and calculated distribution coefficients. The extraction of nitric acid by tributyl phosphate has been modeled to illustrate the programs use.
Date: January 17, 2002
Creator: Lumetta, Gregg J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Metracker version 1.5: Life-cycle performance metricstracking

Description: Buildings often do not perform as well in practice as expected during pre-design planning, nor as intended at the design stage, nor even as measured during commissioning and maintenance operations. While this statement is generally considered to be true, it is difficult to quantify the impacts and long-term economic implications of a building in which performance does not meet expectations. This leads to a building process that is devoid of quantitative feedback that could be used to detect and… more
Date: January 17, 2002
Creator: Hitchcock, Robert J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Openlink : a flexible integration system for environmental risk analysis and management.

Description: Most existing computer codes for modeling environmental pathways were developed to satisfy a specific objective (e.g., perform analyses to demonstrate regulatory compliance). Over time, the codes have been written in various computer languages and software environments that are often not compatible with each other. In recent years, largely driven by advances in industrial software, a new concept for software development based on modularization has emerged. This approach entails the development … more
Date: January 17, 2002
Creator: LePoire, D. J.; Arnish, J.; Gnanapraasam, E.; Klett, T.; Johnson, R.; Chen, S. Y. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Preliminary MCNP-POLIMI Simulations for the Evaluation of the ''Floor Effect'': Comparison of APSTNG and Cf Sources

Description: The present simulations performed with the Monte Carlo code MCNP-POLIMI [1] have the scope of evaluating the associated-particle sealed tube neutron generator (APSTNG) for use as an interrogation source in the source-driven noise analysis method for the assay of nuclear materials. In the Nuclear Materials Identification System (NMIS) developed at the Oak Ridge National Laboratory, the time dependent cross-correlation of the timed neutron source and detector responses is one of the signatures ac… more
Date: January 17, 2002
Creator: Pozzi, S.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fission Multiplicity Detection With Temporal Gamma-Neutron Discrimination From Higher Order Time Correlation Statistics

Description: The subject of this thesis is the nondestructive assay (NDA) of nuclear materials. NDA is made possible by the fact that fissile and fertile transuranic isotopes emit characteristic radiations. Fission Multiplicity Detection (FMD) is the name of the standard technique used in NDA of nuclear materials in the 1960s and 1970s. It was characterized by the use of fast plastic scintillating detectors. These systems were used in both active and passive mode. These FMD systems were eventually replaced … more
Date: January 17, 2002
Creator: Oberer, R.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effect of the location of Mn sites in ferromagnetic GaMnAs on its Curie temperature

Description: We report a strong correlation between the location of Mn sites in ferromagnetic Ga{sub 1-x}Mn{sub x}As measured by channeling Rutherford backscattering and by particle induced x-ray emission experiments and its Curie temperature. The concentrations of free holes determined by electrochemical capacitance-voltage profiling and of uncompensated Mn{sup ++} spins determined from SQUID magnetization measurements are found to depend on the concentration of unstable defects involving highly mobile Mn … more
Date: January 17, 2002
Creator: Yu, K.M.; Walukiewicz, W.; Wojtowicz, T.; Kuryliszyn, I.; Liu, X.; Sasaki, Y. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Liquid Wall Options for Tritium-Lean Fast Ignition Inertial Fusion Energy Power Plants

Description: In an inertial fusion energy (FE) thick-liquid chamber design such as HYLEE-II, a molten-salt is used to attenuate neutrons and protect the chamber structures from radiation damage. In the case of a fast ignition inertial fusion system, advanced targets have been proposed that may be self-sufficient in terms of tritium breeding (i.e., the amount of tritium bred in target exceeds the amount burned). This aspect allows for greater freedom when selecting a liquid for the protective blanket, given … more
Date: January 17, 2002
Creator: Reyes, S.; Schmitt, R. C.; Latkowski, J. F. & Durbin, S.G.' Sanz, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Use of Clearance Indexes to Assess Waste Disposal Issues for the HYLIFE-II Inertial Fusion Energy Power Plant Design

Description: Traditionally, waste management studies for fusion energy have used the Waste Disposal Rating (WDR) to evaluate if radioactive material from irradiated structures could qualify for shallow land burial. However, given the space limitations and the negative public perception of large volumes of waste, there is a growing international motivation to develop a fusion waste management system that maximizes the amount of material that can be cleared or recycled. In this work, we present an updated ass… more
Date: January 17, 2002
Creator: Reyes, S; Latkowski, J F & Sanz, J
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Feature Subset Selection by Estimation of Distribution Algorithms

Description: This paper describes the application of four evolutionary algorithms to the identification of feature subsets for classification problems. Besides a simple GA, the paper considers three estimation of distribution algorithms (EDAs): a compact GA, an extended compact GA, and the Bayesian Optimization Algorithm. The objective is to determine if the EDAs present advantages over the simple GA in terms of accuracy or speed in this problem. The experiments used a Naive Bayes classifier and public-doma… more
Date: January 17, 2002
Creator: Cantu-Paz, E
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Progress Toward Heavy Ion IFE

Description: Successful development of Heavy Ion Fusion (HIF) will require scientific and technology advances in areas of targets, drivers and chambers. Design work on heavy ion targets indicates that high gain (60-130) may be possible with a -3-6 MJ driver depending on the ability to focus the beams to small spot sizes. Significant improvements have been made on key components of heavy ion drivers, including sources, injectors, insulators and ferromagnetic materials for long-pulse induction accelerator cel… more
Date: January 17, 2002
Creator: Meier, W. R.; Logan, B. G.; Waldron, W. L.; Sabbi, G. L.; Callahan-Miller, D. A.; Peterson, P. F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Engineered Antibodies for Monitoring of Polynuclear Aromatic Hydrocarbons

Description: This project was undertaken to fill needs in ODE's human and ecosystem health effects research, site remediation, rapid emergency response, and regulatory compliance monitoring programs. Doe has greatly stimulated development and validation of antibody-based, rapid, field-portable detection systems for small hazardous compounds. These range from simple dipsticks, microplate enzyme-linked immunosorbent assays (ELISAs), and hand-held colorimeters, to ultrasensitive microfluidic reactors, fiber-op… more
Date: January 17, 2002
Creator: Karu, Alexander E.; Roberts, Victoria A. & Li, Qing X.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of the location and recency of faulting near prospective surface facilities in Midway Valley, Nye County, Nevada

Description: Evaluation of surface faulting that may pose a hazard to prospective surface facilities is an important element of the tectonic studies for the potential Yucca Mountain high-level radioactive waste repository in southwestern Nevada. For this purpose, a program of detailed geologic mapping and trenching was done to obtain surface and near-surface geologic data that are essential for determining the location and recency of faults at a prospective surface-facilities site located east of Exile Hill… more
Date: January 17, 2002
Creator: Swan, F. H.; Wesling, J. R.; Angell, M. M.; Thomas, A. P.; Whitney, J. W. & Gibson, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement of Hydroperoxides During the Texas 2000 Air Quality Study

Description: Hydroperoxides are important atmospheric oxidants. They are responsible for most of the oxidation of aqueous-phase SO{sub 2} to sulfate in the northeastern United States, resulting in the formation of acid precipitation and visibility-reducing sulfate aerosol (Penkett et al., 1979; Lind et al., 1987; Madronich and Calvert, 1990; Tanner and Schorran, 1995). Atmospheric hydrogen peroxide (H{sub 2}O{sub 2} or HP) is produced by the self-reaction of hydroperoxyl radicals (HO{sub 2}); higher organic… more
Date: January 17, 2002
Creator: Zheng, J.; Alaouie, A.; Weinstein-Lloyd, J. B.; Springston, S. R.; Nunnermacker, L. J.; Lee, Y. N. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Measurement of Hydroperoxides During the Texas 2000 Air Quality Study

Description: Hydroperoxides are important atmospheric oxidants. They are responsible for most of the oxidation of aqueous-phase SO{sub 2} to sulfate in the northeastern United States, resulting in the formation of acid precipitation and visibility-reducing sulfate aerosol (Penkett et al., 1979; Lind et al., 1987; Madronich and Calvert, 1990; Tanner and Schorran, 1995). Atmospheric hydrogen peroxide (H{sub 2}O{sub 2} or HP) is produced by the self-reaction of hydroperoxyl radicals (HO{sub 2}); higher organic… more
Date: January 17, 2002
Creator: Zheng, J.; Alaouie, A.; Weinstein-Lloyd, J. B.; Springston, S. R.; Nunnermacker, L. J.; Lee, Y. N. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Plutonium Attribute Estimation From Passive NMIS Measurements at VNIIEF

Description: Currently, the most relevant application of NMIS for plutonium attribute estimation stems from measurements performed jointly by Oak Ridge National Laboratory (ORNL) and Russian Federal Nuclear Center, All-Russia Scientific Research Institute of Experimental Physics (RFNC-VNIIEF) personnel at RFNC-VNIIEF facilities in Sarov, Russia in June and July 2000. During these measurements at VNIIEF, NMIS was applied in its passive mode to eight unclassified plutonium spherical shells. The shells' proper… more
Date: January 17, 2002
Creator: Mattingly, J.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laboratory Evaluation of Underwater Grouting of CPP-603 Basins

Description: A project is underway to deactivate a Fuel Storage Basin. The project specifies the requirements and identifies the tasks that will be performed for deactivation of the CPP- 603 building at the Idaho Nuclear Technology and Engineering Center of the Idaho National Engineering and Environmental Laboratory. The Fuel Receiving and Storage Building (CPP- 603) was originally used to receive and store spent nuclear fuel from various facilities. The area to undergo deactivation includes the three spent… more
Date: January 17, 2002
Creator: Johnson, V. J.; Pao, J. H.; Demmer, R. L. & Tripp, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Africa and the War on Terrorism

Description: African countries overwhelmingly expressed their support for the U.S.-led efforts on the war against terrorism shortly after the September 11 attacks on New York and Washington. Some African countries are reportedly sharing intelligence and are coordinating with Washington to fight terrorism in Africa. Administration officials believe that Africa is a potential breeding ground for terrorism. Some African officials are concerned that despite the strong support African governments have provided t… more
Date: January 17, 2002
Creator: Dagne, Theodore S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

China and the World Trade Organization

Description: China has sought over the past several years to become a member of the World Trade Organization (WTO), the international agency that administers multilateral trade rules. China’s WTO membership (as well as that of Taiwan’s) was formally approved at the WTO Ministerial Conference in Doha, Qatar in November 2001. On December 11, 2001, China officially became a WTO member. WTO membership will require China to significantly liberalize its trade and investment regimes, which could produce significan… more
Date: January 17, 2002
Creator: Morrison, Wayne M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Extending the Internet Tax Moratorium and Related Issues

Description: The Internet Tax Freedom Act, enacted in 1998, placed a 3-year moratorium on the ability of state and local governments 1) to impose new taxes on Internet access or 2) to impose multiple or discriminatory taxes on electronic commerce. It grandfathered existing taxes on Internet access. The original moratorium expired on October 21, 2001. Numerous bills to extend the moratorium were introduced in the first session of the 107th Congress. The Congress approved H.R. 1552 (P.L. 107-75, enacted Novem… more
Date: January 17, 2002
Creator: Noto, Nonna A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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