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Informe de la Comision de la Verdad Para El Salvador: Anexos, Tomo 2

Description: Second annex published as part of the United Nations (UN) report from The Commission on the Truth for El Salvador (La Comision de la Verdad para El Salvador). This section includes supplementary documentation of the Commission's work: statistical analysis of testimony received, lists of victims, lists of disappeared persons, a list of members of the armed forces who were killed, and a list of members of the Frente Farabundo Martí para la Liberación Nacional (FMLN) who were killed.
Date: 1993
Creator: La Comision de la Verdad para El Salvador
Partner: UNT Libraries

Optical properties of fly ash. Volume 1, Final report

Description: Research performed under this contract was divided into four tasks under the following headings: Task 1, Characterization of fly ash; Task 2, Measurements of the optical constants of slags; Task 3, Calculations of the radiant properties of fly ash dispersions; and Task 4, Measurements of the radiant properties of fly ash dispersions. Tasks 1 and 4 constituted the Ph.D. research topic of Sarbajit Ghosal, while Tasks 2 and 3 constituted the Ph.D. research topic of Jon Ebert. Together their doctoral dissertations give a complete account of the work performed. This final report, issued in two volumes consists of an executive summary of the whole program followed by the dissertation of Ghosal. Volume 1 contains the dissertation of Ghosal which covers the characterization of fly ash and the measurements of the radiant properties of fly ash dispersions. A list of publications and conference presentations resulting from the work is also included.
Date: December 1, 1994
Creator: Self, S.A.
Partner: UNT Libraries Government Documents Department

Optical properties of fly ash. Volume 2, Final report

Description: Research performed under this contract was divided into four tasks under the following headings: Task 1, Characterization of fly ash; Task 2, Measurements of the optical constants of slags; Task 3, Calculations of the radiant properties of fly ash dispersions; and Task 4, Measurements of the radiant properties of fly ash dispersions. Tasks 1 and 4 constituted the Ph.D. research topic of Sarbajit Ghosal, while Tasks 2 and 3 constituted the Ph.D. research topic of Jon Ebert. Together their doctoral dissertations give a complete account of the work performed. This final report, issued in two volumes consists of an executive summary of the whole program followed by the dissertation of Ghosal and Ebert. Volume 2 contains the dissertation of Ebert which covers the measurements of the optical constants of slags, and calculations of the radiant properties of fly ash dispersions. A list of publications and conference presentations resulting from the work is also included.
Date: December 1, 1994
Creator: Self, S.A.
Partner: UNT Libraries Government Documents Department

Mixed-conducting ceramic membranes for partial oxygenation of methane

Description: The most significant cost associated with the conventional partial oxidation of methane is that of an oxygen plant. Our new technology offers a way to lower this cost, and in this paper we explore the technology that is based on dense ceramic membranes and that uses air as the oxidant for methane-conversion reactions. Mixed-conducting ceramic materials have been produced from mixed-oxide systems of the La-Sr-Fe-Co-O (SFC) type, in the form of tubes and bars. Thermodynamic stability of the tubes was studied as a function of oxygen partial pressure by high-temperature XRD. Mechanical properties were measured and found to be adequate for a reactor in the case of SFC-2: Electronic and ionic conductivities were measured; SFC-2 is unique in the sense that the ratio of ionic to electronic conductance is close to unity. Performance of the membrane tubes was good only with SFC-2. Fracture of other SFC tubes was the consequence of an oxygen gradient that introduced a volumetric lattice difference between the inner and outer walls. SFC-2 tubes provided methane conversion efficiencies of >99% in a reactor. These tubes have operated for >1000 h.
Date: May 1, 1995
Creator: Balachandran, U.; Dusek, J.T.; Maiya, P.S.; Mieville, R.L.; Kleefisch, M.S.; Udovich, C.A. et al.
Partner: UNT Libraries Government Documents Department

Development of an ultrasonic process for soil remediation

Description: An ultrasonic process for the detoxification of carbon tetrachloride- (CCl{sub 4}{sup {minus}}) contaminated soil was investigated in the laboratory by using a batch irradiation reactor equipped with a 600-W ultrasonic power supply operated at a frequency of 20 kHz. Key parameters studied included soil characteristics, irradiation time, CCl{sub 4} concentration, steady-state operating temperature, applied ultrasonic-wave energy, and the ratio of soil to water in the system. The results of the experiments showed that (1) residual CCl{sub 4} concentrations could be decreased with longer irradiation periods and (2) detoxification efficiency was proportional to steady-state operating temperature and applied ultrasonic-wave energy. The characteristics of the contaminated soil were found to be an important factor in the design of an ultrasonic detoxification system. A soil-phase CCl{sub 4} concentration below 1 ppm (initial concentration of 56 ppm) was achieved through this process, indicating that the application of ultrasonic irradiation is feasible and effective in the detoxification of soil contaminated by organic compounds. On the basis of the experimental results, a schematic of a full-scale ultrasonic soil-detoxification system was developed. Improvements to this novel process are discussed.
Date: June 1, 1995
Creator: Wu, J.M.; Huang, H.S. & Livengood, C.D.
Partner: UNT Libraries Government Documents Department

The DART dispersion analysis research tool: A mechanistic model for predicting fission-product-induced swelling of aluminum dispersion fuels. User`s guide for mainframe, workstation, and personal computer applications

Description: This report describes the primary physical models that form the basis of the DART mechanistic computer model for calculating fission-product-induced swelling of aluminum dispersion fuels; the calculated results are compared with test data. In addition, DART calculates irradiation-induced changes in the thermal conductivity of the dispersion fuel, as well as fuel restructuring due to aluminum fuel reaction, amorphization, and recrystallization. Input instructions for execution on mainframe, workstation, and personal computers are provided, as is a description of DART output. The theory of fission gas behavior and its effect on fuel swelling is discussed. The behavior of these fission products in both crystalline and amorphous fuel and in the presence of irradiation-induced recrystallization and crystalline-to-amorphous-phase change phenomena is presented, as are models for these irradiation-induced processes.
Date: August 1, 1995
Creator: Rest, J.
Partner: UNT Libraries Government Documents Department

U.S. Contribution 1994 Summary Report Task T12: Compatibility and irradiation testing of vanadium alloys

Description: Vanadium alloys exhibit important advantages as a candidate structural material for fusion first wall/blanket applications. These advantages include fabricability, favorable safety and environmental features, high temperature and high wall load capability, and long lifetime under irradiation. Vanadium alloys with (3-5)% chromium and (3-5)% titanium appear to offer the best combination of properties for first wall/blanket applications. A V-4Cr-4Ti alloy is recommended as the reference composition for the ITER application. This report provides a summary of the R&D conducted during 1994 in support of the ITER Engineering Design Activity. Progress is reported for Vanadium Alloy Production, Welding, Physical Properties, Baseline Mechanical Properties, Corrosion/Compatibility, Neutron Irradiation Effects, Helium Transmutation Effects on Irradiated Alloys, and the Status of Irradiation Experiments. Separate abstracts have been prepared for individual reports from this publication.
Date: March 1, 1995
Creator: Smith, D.L.
Partner: UNT Libraries Government Documents Department

Determination of the toxicity characteristic for metals in soil: A comparison of the toxicity characteristic leaching procedure and total metal determination

Description: A comparison is made of the concentrations of metals extracted from soils using the Toxicity Characteristic Leaching Procedure (TCLP) and a total determination method. This information is of interest in two ways. First, it is hoped that a relationship might be established between the amount of each metal determined after extraction by the TCLP and the amount determined using a total determination method. And second, data are also presented which indicate the general extractability of various metals in soil samples using the TCLP. This study looks specifically at inorganic elements (Sb, As, Ba, Cd, Cu, Cr, Pb, Mg, Hg, Se, Ag, Sn, and Zn) in soils from a firing range. Results show that total determination methods for metals can not generally be used for heterogeneous samples, such as soil samples from a firing range. Some correlation between a total determination method and TCLP was observed when Ba and Cd were present in the samples at lower concentrations (less than 80 mg/kg for Ba and less than 25 mg/kg for Cd); however, additional data are necessary to verify this correlation.
Date: December 1, 1994
Creator: Bass, D.A. & Taylor, J.D.
Partner: UNT Libraries Government Documents Department

Site scientific mission plan for the southern great plains CART site, July--December 1995

Description: The Southern Great Plains (SGP) Cloud and Radiation Testbed (CART) site is designed to help satisfy the data needs Of the Atmospheric Radiation Measurement (ARM) Program Science Team. This document defines the scientific Priorities for site activities during the six months beginning on July 1, 1995, and looks forward in lesser detail to subsequent six-month periods. The Primary Purpose of this Site Scientific Mission Plan is to provide guidance for the development of plans for site operations. It also provides information on current plans to the ARM functional teams and serves to disseminate the plans more generally within the ARM Program and among the members of the Science Team. This document includes a description of the operational status of the site and the primary envisioned site activities, together with information concerning approved and proposed Intensive Observation Periods (IOPs). This plan is a living document that will be updated and reissued every six months as the observational facilities are developed, tested, and augmented and as Priorities are adjusted in response to developments in scientific planning and understanding.
Date: July 1995
Creator: Splitt, M. E.; Lamb, P. J. & Sisterson, D. L.
Partner: UNT Libraries Government Documents Department

Development of the Integrated Performance Evaluation Program (IPEP) for the Department of Energy`s Office of Environmental Management

Description: Argonne National Laboratory (ANL) and DOE`s Radiological and Environmental Sciences Laboratory (RESL), Environmental Measurements Laboratory (EML), and Grand Junction Project office (GJPO) are collaborating with DOE`s Office of Environmental Management (EM), Analytical Services Division (ASD, EM-263) and the Environmental Protection Agency (EPA) to develop an Integrated Performance Evaluation Program (IPEP). The purpose of the IPEP is to integrate information from existing PE programs with expanded QA activities to develop information about the quality of radiological, mixed waste, and hazardous environmental sample analyses provided by all laboratories supporting EM programs. The IPEP plans to utilize existing PE programs when available and appropriate for use by DOE; new PE programs will be developed only when no existing program meets DOEs needs. Interagency Agreements have been developed between EPA and DOE to allow DOE to use major existing PE programs developed by EPA. In addition, the DOE radiological Quality Assessment Program (QAP) administered by EML is being expanded for use in EM work. RESL and GJPO are also developing the Mixed Waste Performance Evaluation Program (MAPEP) to provide radiological, inorganic, and organic analytes of interest to EM programs. The use of information from multiple PE programs will allow a more global assessment of an individual laboratory`s performance, as well as providing a means of more fairly comparing laboratories` performances in a given analytical area. The EPEP will interact with other aspects of the ASD such as audit and methods development activities to provide an integrated system for assessment and improvement of data quality.
Date: June 1, 1995
Creator: Lindahl, P.; Streets, E.; Bass, D.; Hensley, J.; Newberry, R. & Carter, M.
Partner: UNT Libraries Government Documents Department

Determining training needs from supervisors` assessment of staff proficiency in tasks and skills

Description: To provide the basis for establishing training opportunities, this project investigated supervisors` views of three components of staff activities. The project established the tasks that staff perform, identified staffs level of effectiveness in performing these tasks, and investigated staffs level of proficiency in performing the skills underlying these tasks. Training opportunities were then determined in those areas where knowledge and skins could be improved for staff to perform their tasks more effectively. Staff currently perform their tasks sufficiently well. Furthermore, supervisors indicated that for the most part staff do perform the tasks they should perform. In carrying out these tasks, staff use primarily critical thinking, problem solving, and communication skills rather than discipline-specific skills. Although staff generally have working knowledge of most of these skills, additional training in critical thinking and problem solving, program and project management techniques, and communications is appropriate to further improve the organizations effectiveness.
Date: June 1, 1995
Creator: Young, C.; Hensley, J. & Lehr, J.
Partner: UNT Libraries Government Documents Department

Users guide to the Argonne SP scheduling system

Description: During the past five years scientists discovered that modern UNIX workstations connected with ethernet and fiber networks could provide enough computational performance to compete with the supercomputers of the day. As this concept became increasingly popular, the need for distributed queuing and scheduling systems became apparent. Today, supercomputers, such as Argonne National Laboratory`s IBM SP system, can provide more CPU and networking speed than can be obtained from these networks of workstations. These modern supercomputers look like clusters of workstations, however, so developers felt that the scheduling systems that were previously used on clusters of workstations should still apply. After trying to apply some of these scheduling systems to Argonne`s SP environment, it became obvious that these two computer environments have very different scheduling needs. Recognizing this need and realizing that no one has addressed it, we developed a new scheduling system. The approach taken in creating this system was unique in that user input and interaction were encouraged throughout the development process. Thus, a scheduler was built that actually worked the way the users wanted it to work. This document serves a dual purpose. It is both a user`s guide and an administrator`s guide for the ANL SP scheduling system. Look for revisions to this guide that will be appearing.
Date: May 1, 1995
Creator: Lifka, D.A.; Henderson, M.W. & Rayl, K.
Partner: UNT Libraries Government Documents Department

Diffusion in phase space

Description: In order to study diffusion in any region of phase space containing nested closed curves we choose action-angle variables, {gamma}, J. the action J labels each closed phase curve and is equal to its area divided by 2{pi}. We can introduce rectangular variables Q,P by the equations Q=(2J){sup 1/2}sin{gamma}, P=(2J){sup 1/2}cos{gamma}, where the angle variable {gamma} is measured clockwise from the P-axis. The phase curves are circles in the Q,P plane with radius (2J){sup 1/2}. We assume that the motion consists of a Hamiltonian motion along a curve of fixed J (in the original coordinate system and in the system Q,P) plus a diffusion and a damping which can change the value of J. Now consider a system of particles described by a density {rho}(J,t), so that the number of particles between the curves J and J+dJ is dN={rho}(J,t)dJ. These cN particles are distributed uniformly in the phase space between the curves J and J+dJ.
Date: April 5, 1993
Creator: Symon, K.
Partner: UNT Libraries Government Documents Department

Automated laser scatter detection of surface and subsurface defects in Si{sub 3}N{sub 4} components

Description: Silicon Nitride (Si{sub 3}N{sub 4}) ceramics are currently a primary material of choice to replace conventional materials in many structural applications because of their oxidation resistance and desirable mechanical and thermal properties at elevated temperatures. However, surface or near-subsurface defects, such as cracks, voids, or inclusions, significantly affect component lifetimes. These defects are currently difficult to detect, so a technique is desired for the rapid automated detection and quantification of both surface and subsurface defects. To address this issue, the authors have developed an automated system based on the detection of scattered laser light which provides a 2-D map of surface or subsurface defects. This system has been used for the analysis of flexure bars and button-head tensile rods of several Si{sub 3}N{sub 4} materials. Mechanical properties of these bars have also been determined and compared with the laser scatter results.
Date: June 1995
Creator: Steckenrider, J. S.
Partner: UNT Libraries Government Documents Department

Work plan for the remedial investigation/feasibility study for the groundwater operable units at the Chemical Plant Area and the Ordnance Works Area, Weldon Spring, Missouri

Description: US Department of Energy (DOE) and the US Army Corps of Engineers (CE) are conducting cleanup activities at two properties, the chemical plant area and the ordnance works area, located adjacent to one another in St. Charles County, Missouri. In accordance with the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), as amended, DOE and CE are evaluating conditions and potential responses at the chemical plant area and at the ordnance works area, respectively, to address groundwater and surface water contamination. This work plan provides a comprehensive evaluation of areas that are relevant to the (GWOUs) of both the chemical plant and the ordnance works area. Following areas or media are addressed in this work plan: groundwater beneath the chemical plant area (including designated vicinity properties described in Section 5 of the RI for the chemical plant area [DOE 1992d]) and beneath the ordnance works area; surface water and sediment at selected springs, including Burgermeister Spring. The organization of this work plan is as follows: Chapter 1 discusses the objectives for conducting the evaluation, including a summary of relevant site information and overall environmental compliance activities to be undertaken; Chapter 2 presents a history and a description of the site and areas addressed within the GWOUs, along with currently available data; Chapter 3 presents a preliminary evaluation of areas included in the GWOUs, which is based on information given in Section 2, and discusses data requirements; Chapter 4 presents rationale for data collection or characterization activities to be carried out in the remedial investigation (RI) phase, along with brief summaries of supporting documents ancillary to this work plan; Chapter 5 discusses the activities planned for GWOUs under each of the 14 tasks for an remedial (RI/FS); Chapter 6 presents proposed schedules for RI/FS for the GWOUS; and Chapter 7 explains ...
Date: August 1995
Partner: UNT Libraries Government Documents Department

Cultural resource management: The risk of compliance

Description: The statutory mandate for federal agencies to involve American Indians in the management of cultural resources may create a cultural risk for the people those statutes are intended to protect. A conceptual framework is given to help understand this dilemma. Factors that can exacerbate the severity of the adverse cultural impacts for tribal people are also examined. Policy recommendations are offered for reducing tensions among an the participants in the statutory process.
Date: February 1, 1994
Creator: Curtis, S.A.
Partner: UNT Libraries Government Documents Department

Actinide-containing metal disposition alloys

Description: Argonne National Laboratory is currently developing an electro-metallurgical process for treating a wide array of spent nuclear fuels. As part of this process, two waste streams will be consolidated into waste forms; one will be a mineral and the other a metal alloy. The metal waste form is an alloy that contains cladding hulls, ``noble`` metal fission products, and Zr from alloy fuels. The nominal composition of the metal waste form alloys are stainless steel-15 wt.% Zr (SS-15Zr) for stainless steel clad fuel and Zircaloy-8 wt.% stainless steel (Zr-8SS) for Zircaloy clad fuel, with both alloys also containing up to 4 wt.% noble metal fission products. This paper investigates using the two nominal metal alloy compositions described above as a possible Pu and TRU disposition form.
Date: May 1, 1996
Creator: Keiser, D.D. Jr. & McDeavitt, S.M.
Partner: UNT Libraries Government Documents Department

Array display tool ADT reference manual. Version 1.0

Description: Array Display Tool (ADT) is a Motif Program to display arrays of process variables from the Advanced Photon Source control system. A typical use is to display the horizontal and vertical monitor readings. The screen layout, apart from the menu bar, consists of two types of graphic areas in which the values for the arrays of process variables are shown: Display areas, which display one or more arrays as a function of index, and a zoom area. In the zoom area specified arrays are displayed as a function of lattice position along with symbols for the major elements of the lattice. There can be several display areas, but at most one zoom area. When the screen is resized these areas change size proportionally. There are several (currently 5) slots in which you can store values internally. In addition you can display the values with specified reference values subtracted. The program continuously updates and displays the standard deviation, average, and maximum absolute values for each array and will show the envelope of recent values if desired. The time between updates can be changed via the View Menu or may be specified in the PV file. There is a configuration file that is needed to get ADT running. Most of the features of the screen layout, including what process variables are shown in what display areas. are determined by a PV file. The contents of this file determine such things as curve color, units, and scaling. Another relevant file is a lattice file, which specifies the symbols and longitudinal lattice positions of the elements in the lattice.Sets of values can be saved and restored via snapshot files. Most of the available options can be discovered intuitively by looking through the menus. This manual is primary for reference and is not a tutorial.
Date: June 1, 1995
Creator: Evans, K. Jr.
Partner: UNT Libraries Government Documents Department

A theoretical analysis of population genetics of plants on restored habitats

Description: Seed and propagules used for habitat restoration are not likely to be closely adapted to local site conditions. Rapid changes of genotypes frequencies on local microsites and/or microevolution would allow plants to become better adapted to a site. These same factors would help to maintain genetic diversity and ensure the survival of small endangered populations. We used population genetics models to examine the selection of genotypes during establishment on restored sites. Vegetative spread was shown to affect selection and significantly reduce genetic diversity. To study general microevolution, we linked a model of resource usage with a genetics model and analyzed competition between genotypes. A complex suite of feasible ecogenetic states was shown to result. The state actually resulting would depend strongly on initial conditions. This analysis indicated that genetic structure can vary locally and can produce overall genetic variability that is not simply the result of microsite adaptations. For restoration activities, the implication is that small differences in seed source could lead to large differences in local genetic structure after selection.
Date: February 1, 1995
Creator: Bogoliubov, A.G. & Loehle, C.
Partner: UNT Libraries Government Documents Department


Description: Virtual reality has become an increasingly familiar part of the science of visualization and communication of information. This, combined with the increase in connectivity of remote sites via high-speed networks, allows for the development of a collaborative distributed virtual environment. Such an environment enables the development of supercomputer simulations with virtual reality visualizations that can be displayed at multiple sites, with each site interacting, viewing, and communicating about the results being discovered. The CAVEComm library is a set of routines designed to generalize the communications between virtual environments and supercomputers.
Date: March 1, 1996
Creator: Disz, T.; Papka, M.; Pellegrino, M. & Stevens, R.
Partner: UNT Libraries Government Documents Department

Use of silicide fuel in the Ford Nuclear Reactor - to lengthen fuel element lifetimes

Description: Based on economic considerations, it has been proposed to increase the lifetime of LEU fuel elements in the Ford Nuclear Reactor by raising the {sup 235}U plate loading from 9.3 grams in aluminide (UAl{sub x}) fuel to 12.5 grams in silicide (U{sub 3}Si{sub 2}) fuel. For a representative core configuration, preliminary neutronic depletion and steady state thermal hydraulic calculations have been performed to investigate core characteristics during the transition from an all-aluminide to an all-silicide core. This paper discusses motivations for this fuel element upgrade, results from the calculations, and conclusions.
Date: December 31, 1995
Creator: Bretscher, M.M.; Snelgrove, J.L.; Burn, R.R. & Lee, J.C.
Partner: UNT Libraries Government Documents Department