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News Bulletin (Castroville, Tex.), Vol. 41, No. 12, Ed. 1 Thursday, March 25, 1999
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
March 25, 1999
Creator:
Barnes, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
News Bulletin (Castroville, Tex.), Vol. 41, No. 47, Ed. 1 Thursday, November 25, 1999
Weekly newspaper from Castroville, Texas that includes local, state, and national news along with extensive advertising.
Date:
November 25, 1999
Creator:
Barnes, Thomas
Object Type:
Newspaper
System:
The Portal to Texas History
Three Dimensional, Integrated Characterization and Archival System for Remote Facility Contaminant Characterization
The largest problem facing the Department of Energy's Office of Environmental Management (EM) is the cleanup of the Cold War legacy nuclear production plants that were built and operated from the mid-forties through the late eighties. EM is now responsible for the remediation of no less than 353 projects at 53 sites across the country at, an estimated cost of $147 billion over the next 72 years. One of the keys to accomplishing a thorough cleanup of any site is a rigorous but quick contaminant characterization capability. If the contaminants present in a facility can be mapped accurately, the cleanup can proceed with surgical precision, using appropriate techniques for each contaminant type and location. The three dimensional, integrated characterization and archival system (3D-ICAS) was developed for the purpose of rapid, field level identification, mapping, and archiving of contaminant data. The system consists of three subsystems, an integrated work and operating station, a 3-D coherent laser radar, and a contaminant analysis unit. Target contaminants that can be identified include chemical (currently organic only), radiological, and base materials (asbestos). In operation, two steps are required. First, the remotely operable 3-D laser radar maps an area of interest in the spatial domain. Second, …
Date:
April 25, 1999
Creator:
Barry, R.E.; Gallman, P.; Jarvis, G. & Griffiths, P.
Object Type:
Article
System:
The UNT Digital Library
A Remotely Deployed Laser System for Viewing/Metrology
A metrology system is being developed for in-vessel inspection of present day experimental, and next generation fusion reactors. It requires accurate measuring capability to verify sub-millimeter alignment of plasma-facing components in the reactor vessel. A metrology system capable of achieving such accuracy for next generation reactors must be compatible with the vessel environment of high gamma radiation, high vacuum, elevated temperature, and magnetic field. This environment requires that the system must be remotely deployed. A coherent, frequency modulated laser radar system that is capable of correcting for environmental vibration meets these requirements. The metrologyhiewing system consists of a compact laser transceiver optics module which is linked through fiber optics to the laser source and imaging units, that are located outside of the harsh environment. The deployment mechanism configured for a next generation reactor was telescopic-mast positioning system. This paper identifies the requirements for the metrology/viewing system having precision ranging and surface mapping capability, and discusses the results of various environmental tests.
Date:
April 25, 1999
Creator:
Barry, Robert E.; Herndon, Joseph N.; Menon, Madhavan M. & Spampinato, Philip T.
Object Type:
Article
System:
The UNT Digital Library
Hysteresis in Thin-Film Rechargeable Lithium Batteries
Discharge - charge cycling of thin-film rechargeable lithium batteries with an amorphous or nanocrystalline LiXMn2.Y04 cathode reveals evidence for a true hysteresis in the lithium insertion reaction. This is compared with an apparent hysteresis attributed to a kinetically hindered phase transition near 3 V for batteries with either a crystalline or a nanocrystalline LiJ@Yo4 cathode.
Date:
April 25, 1999
Creator:
Bates, J. B.; Dudney, N. J.; Evans, C. D. & Hart, F. X.
Object Type:
Article
System:
The UNT Digital Library
Disaster Mitigation Bills in the 106th Congress: H.R. 707, S. 1691 Compared
The Robert T. Stafford Disaster Relief and Emergency Assistance Act authorizes the President to declare that an emergency or major disaster exists that overwhelms state and local resources. Legislation before the 106th Congress (H.R. 707 and S. 1691) would, among other matters, amend the Act to: (1) fund hazard mitigation projects designed to reduce future disaster losses; (2) add conditions to assistance; and (3) consolidate provisions governing the distribution of aid to disaster victims. This report compares provisions of the two bills, and will be updated as legislative action occurs.
Date:
October 25, 1999
Creator:
Bea, Keith
Object Type:
Report
System:
The UNT Digital Library
Increasing Heavy Oil Reserves in the Wilmington Oil Field through Advanced Reservoir Characterization and Thermal Production Technologies
The objective of this project is to increase the recoverable heavy oil reserves within sections of the Wilmington Oil Field, near Long Beach, California. This is realized through the testing and application of advanced reservoir characterization and thermal production technologies. It is hoped that the successful application of these technologies will result in their implementation throughout the Wilmington Field and through technology transfer, will be extended to increase the recoverable oil reserves in other slope and basin clastic (SBC) reservoirs. The existing steamflood in the Tar zone of Fault Block (FB) II-A has been relatively insufficient because of several producability problems which are common in SBC reservoir; inadequate characterization of the heterogeneous turbidite sands, high permeability thief zones, low gravity oil and non-uniform distribution of the remaining oil. This has resulted in poor sweep efficiency, high steam-oil ratios, and early breakthrough. Operational problems related to steam breakthrough, high reservoir pressure, and unconsolidated sands have caused premature well and downhole equipment failures. In aggregate, these reservoir and operational constraints have resulted in increased operating costs and decreased recoverable reserves.
Date:
June 25, 1999
Creator:
Beach, City of Long; Associates, David K.Davies and; Company, Tidelands Oil Production & California, University of Southern
Object Type:
Report
System:
The UNT Digital Library
Lifetime Response of a Hi-Nicalon Fiber-Reinforced Melt-Infiltrated SiC Matrix Composites
Lifetime studies in four-point flexure were performed on a Hi-Nicalon<sup>TM</sup> fiber-reinforced SiC matrix composite over a temperature range of 700 degrees to 1150 degrees C in air. The composite consisted of ~40 vol. % Hi-Nicalon<sup>TM</sup> fiber (8-harness weave) with a 0.5 Mu-m BN fiber coating and a melt-infiltration SiC matrix wand was tested with as-machined surfaces. Lifetime results indicated that the composite exhibited a stress-dependent lifetime at stress levels above an apparent fatigue limit, similar to the trend observed in CG-Nicalon<sup>TM</sup> fiber reinforced CVI SiC matrix composites. At less than or equal to 950 degrees C, the lifetimes of Hi-Nicalon/MI SiC composites decreased with increasing applied stress level and test temperature. However, the lifetimes were extended as test temperature increased from 950 degees to 1150 degrees C as a result of surface crack sealing due to glass formation by the oxidation of Mi SiC matrix. The lifetime governing processes were, in general, attributed to the progressive oxidation of BN fiber coating and formation of glassy phase, which formed a strong bond between fiber and matrix, resulting in embrittlement of the composite with time.
Date:
April 25, 1999
Creator:
Becher, P. F.; Lin, H. T. & Singh, M.
Object Type:
Article
System:
The UNT Digital Library
AX Tank farm closure settlement estimates and soil testing
This study provides a conservative three-dimensional settlement study of the AX Tank Farm closure with fill materials and a surface barrier. The finite element settlement model constructed included the interaction of four tanks and the surface barrier with the site soil and bedrock. Also addressed are current soil testing techniques suitable for the site soil with recommendations applicable to the AX Tank Farm and the planned cone penetration testing.
Date:
March 25, 1999
Creator:
Becker, D. L.
Object Type:
Report
System:
The UNT Digital Library
Testing of vacuum system for APT/LEDA RFQ
The authors have designed, built and operated two vacuum systems for the RFQ (Radio Frequency Quadrupole) in the APT/LEDA (Accelerator Production of Tritium/Low Energy Demonstration Accelerator)linac: a cryopump system for the RFQ cavity and a non-evaporable getter (NEG) pump system for the RF window system. They were designed to provide very high hydrogen pump speed (> 2 x 10{sup 4} L/s) and sorption capacity. Both systems underwent performance tests in mock assembly before the installation. This paper presents the mock test results of both vacuum systems. It also discusses the preliminary test results from the commissioning of the APT/LEDA RFQ.
Date:
March 25, 1999
Creator:
Behne, D.; Berg, J.; DaCosta, M.; Harper, M.; Kishiyama, K.; Schrage, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Thermal Decomposition Characteristics of Orthorhombic Ammonium Perchlorate (o-AP) and an 0-AP/HTPB-Based Propellant
A study to characterize the low-temperature reactive processes for o-AP and an AP/HTPB-based propellant (class 1.3) is being conducted in the laboratory using the techniques of simultaneous thermogravimetric modulated beam mass spectrometry (STMBMS) and scanning electron microscopy (SEM). The results presented in this paper are a follow up of the previous work that showed the overall decomposition to be complex and controlled by both physical and chemical processes. The decomposition is characterized by the occurrence of one major event that consumes up to {approx}35% of the AP, depending upon particle size, and leaves behind a porous agglomerate of AP. The major gaseous products released during this event include H{sub 2}O, O{sub 2}, Cl{sub 2}, N{sub 2}O and HCl. The recent efforts provide further insight into the decomposition processes for o-AP. The temporal behaviors of the gas formation rates (GFRs) for the products indicate that the major decomposition event consists of three chemical channels. The first and third channels are affected by the pressure in the reaction cell and occur at the surface or in the gas phase above the surface of the AP particles. The second channel is not affected by pressure and accounts for the solid-phase reactions characteristic of …
Date:
October 25, 1999
Creator:
Behrens, Richard, Jr. & Minier, Leanna M. G.
Object Type:
Article
System:
The UNT Digital Library
Workshop on Basic Research Opportunities in Photovoltaics
The Basic Research Opportunities in Photovoltaics Workshop was held on May 3, 1999, in Seattle, Washington, in conjunction with the 195th Meeting of the Electrochemical Society. The workshop was structured into eight topics. Each topic area opened with a presentation in which the participants were asked to address the following: a brief introduction of the area of research; key research issues that were identified in an earlier workshop in 1992; what fundamental research has been done since then or is currently being done to address those issues; what are the research issues that are still relevant in light of advances made since the first workshop; identification of new fundamental research opportunities that will lead to important advances and innovations; and identification of significant commonalities and common research issues that have a cross-cutting impact, such as logically exist in silicon-based thin films, II-VI, and related materials. The topic areas discussed included amorphous and microcrystalline silicon, crystalline silicon, cadmium telluride, copper indium diselenide; III-V materials; novel materials and energy conversion approaches, semiconducting oxides, and characterization. After the meeting, participants in each working topic continued discussions by electronic means, completing journal articles that are to be published as a separate section in the …
Date:
August 25, 1999
Creator:
Benner, J.; McConnell, R. & Deb, S., Editors
Object Type:
Report
System:
The UNT Digital Library
The Blend Down Monitoring System Demonstration at the Paducah Gaseous Diffusion Plant
Agreements between the governments of the US and the Russian Federation for the US purchase of low enriched uranium (LEU) derived from highly enriched uranium (HEU) from dismantled Russian nuclear weapons calls for the establishment of transparency measures to provide confidence that nuclear nonproliferation goals are being met. To meet these transparency goals, the agreements call for the installation of nonintrusive US instruments to monitor the down blending of HEU to LEU. The Blend Down Monitoring System (BDMS) has been jointly developed by the Los Alamos National Laboratory (LANL) and the Oak Ridge National Laboratory (ORNL) to continuously monitor {sup 235}U enrichments and mass flow rates at Russian blending facilities. Prior to its installation in Russian facilities, the BDMS was installed and operated in a UF{sub 6} flow loop in the Paducah Gaseous Diffusion Plant simulating flow and enrichment conditions expected in a typical down-blending facility. A Russian delegation to the US witnessed the equipment demonstration in June, 1998. To conduct the demonstration in the Paducah Gaseous Diffusion Plant (PGDP), the BDMS was required to meet stringent Nuclear Regulatory Commission licensing, safety and operational requirements. The Paducah demonstration was an important milestone in achieving the operational certification for the BDMS …
Date:
July 25, 1999
Creator:
Benton, J.; Close, D.; Johnson, W., Jr.; Kerr, P.; March-Leuba, J.; Mastal, E. et al.
Object Type:
Article
System:
The UNT Digital Library
Oral History Interview with Clarabelle Barton Snodgrass, August 25, 1999
Interview with Clarabelle Barton Snodgrass, vice-chair of the Kerr County Historical Commission from Kerrville, Texas. Mrs. Snodgrass talks about growing up on a primitive ranch, struggling to survive during the Depression, meeting and marrying her husband, their family, their involvement with music, and her efforts to preserve the history of Kerr County. She also briefly discusses the honors and awards her volunteer work has earned her. Pages 2-13 include a written statement by Miles Abernathy Lowrence, Clarabelle's maternal great-uncle.
Date:
September 25, 1999
Creator:
Bethel, Ann & Snodgrass, Clarabelle
Object Type:
Text
System:
The Portal to Texas History
Oral History Interview with Clarabelle Barton Snodgrass, August 25, 1999
Interview with Clarabelle Barton Snodgrass from Kerrville, Texas. The interview includes her stories of growing up on a ranch, experiencing the Great Depression, and earning the titles of "Citizen of the Year" and "Woman of the Year."
Date:
August 25, 1999
Creator:
Bethel, Ann & Snodgrass, Clarabelle Barton
Object Type:
Video
System:
The Portal to Texas History
15.4% CuIn1-XGaXSe2-Based Photovoltaic Cells from Solution-Based Precursor Films
We have fabricated 15.4%- and 12.4%-efficient CuIn1-XGaXSe2 (CIGS)-based photovoltaic devices from solution-based electrodeposition (ED) and electroless-deposition (EL) precursors. As-deposited precursors are Cu-rich CIGS. Additional In, Ga, and Se are added to the ED and EL precursor films by physical vapor deposition (PVD) to adjust the final film composition to CuIn1-XGaXSe2. The ED and EL device parameters are compared with those of a recent world record, an 18.8%-efficient PVD device. The tools used for comparison are current voltage, capacitance voltage, and spectral response characteristics.
Date:
May 25, 1999
Creator:
Bhattacharya, R. N.; Batchelor, W.; Contreras, M. A.; Noufi, R. N. (National Renewable Energy Laboratory); Hiltner, J. F. & Sites, J. R. (Department of Physics, Colorado State University)
Object Type:
Article
System:
The UNT Digital Library
Operating Modes of a Teeter-Rotor Wind Turbine
We examine the operating modes of a two-bladed teetered wind turbine. Because of the gyroscopic asymmetry of its rotor, this turbine's dynamics can be quite distinct from those of a turbine with three or more blades. This asymmetry leads to system equations with periodic coefficients that are solved using the Floquet approach to extract the correct modal parameters. The system equations are derived using a simple analytical model with four degrees of freedom: cacelle yaw, rotor teeter, and flapping associated with each blade. Results confirm that the turbine modes become more dominated by the centrifugal and gyroscopic effects as the rotor speed increases. They gyroscopic effect may also cause dynamic instability. Under certain design conditions, yaw and teeter modal frequencies may coalesce.
Date:
February 25, 1999
Creator:
Bir, G. S. (National Renewable Energy Laboratory) & Stol, K. (University of Colorado at Boulder)
Object Type:
Article
System:
The UNT Digital Library
The Harper Herald (Harper, Tex.), Vol. 69, No. 121, Ed. 1 Tuesday, May 25, 1999
Weekly newspaper from Harper, Texas that includes local, state, and national news along with advertising.
Date:
May 25, 1999
Creator:
Bishop, Karen
Object Type:
Newspaper
System:
The Portal to Texas History
1999 Report on Hanford Site land disposal restriction for mixed waste
This report was submitted to meet the requirements of Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement) Milestone M-26-011. This milestone requires the preparation of an annual report that covers characterization, treatment, storage, minimization, and other aspects of managing land-disposal-restricted mixed waste at the Hanford Facility.
Date:
March 25, 1999
Creator:
Black, D. G.
Object Type:
Report
System:
The UNT Digital Library
Coupled THM analysis of the single-heater test at yucca mountain
This paper presents a summary of results from the Single-Heater Test (SHT) at Yucca Mountain, Nevada. In the SHT, a horizontal, 5-m-long, line-heat source was used to heat a rock pillar for nine months. Moisture movement was monitored during and after heating using electrical-resistance tomography (ERT) and neutron-logging techniques. Results indicate drying in regions of the rock where temperature reached 60°C and above. The drying zone is asymmetric and is not centered on the heater, but has lobes extending above and to the sides of the heater. Predicted temperatures agreed well with observations. A cold- trap effect was predicted, in the heater borehole, that efficiently transfers heat along the heater borehole to the excavation wall. A simple thermomechanical analysis of the SHT shows that shear zones predicted for vertical fractures coincide with regions of increased moisture content derived from ERT measurements.
Date:
January 25, 1999
Creator:
Blair, S. C.; Buscheck, T. A.; Daily, W. D.; Lin, W. & Ramirez, A. L.
Object Type:
Article
System:
The UNT Digital Library
Pressure vessels and piping systems: general requirements and documentation for testing
Pressure vessel and piping systems are widely used throughout industry and research laboratories and contain a very large concentration of energy, and yet, despite the fact that their design and installation comply with federal, state and local regulations and recognized industrial standards, there continue to be serious pressure equipment failures. There are many reasons for pressure equipment failure: degradation and thinning of materials with usage, aging, hidden flaws during fabrication, etc. Fortunately, periodic testing and internal and external inspections significantly improve the safety of a pressure vessel or facility. A good testing and inspection program is based on development of procedures for specific industries or types of vessels. This paper describes the elements that should be a part of a pressure testing safety program and the requirements that it should address. The program should comply with pressure safety standards and include the requirements for inspecting pressure vessels, establishing and implementing a written pressure system test work permit, maintaining safety in the testing area, developing in-place pressure testing procedures, keeping records for pressure test calculations and results, and evaluating the system's internal and external integrity.
Date:
February 25, 1999
Creator:
Blyukher, B; Borzileri, C; Brailovsky, Y & Tsicalo, A
Object Type:
Article
System:
The UNT Digital Library
Functional design criteria for pumping and instrumentation control (PIC) skids
Radioactive liquid and semisolid waste from operation of Hanford's nuclear fuel processing plants is stored in 177 underground storage tanks located in the 200 Areas of the Hanford site. 28 of these tanks are of double-shell construction. The remaining 149 tanks are of single-shell construction. Only the newer, double-shell tanks (DST) can meet current requirements for containment of dangerous waste. Therefore, the single-shell tanks (SST) are being ''interim stabilized,'' which is the process of removing liquid from the waste through the use of a jet pump installed in a saltwell which penetrates the waste. Lockheed Martin Hanford Company has decided to purchase additional Pumping and Instrumentation Control (PIC) skids to monitor and control the operation of saltwell jet pumps in SSTs. Similar PIC skids are already in use at several locations. The PIC skids will shut off all power to equipment/instruments if preset limits are exceeded for such conditions as flammable gas, leak detection, pressure and flow, as well as provide air and water necessary for saltwell pumping activities. This document outlines the functional design criteria for pumping and instrumentation control (PIC) skids to support the interim stabilization effort for saltwell pumping.
Date:
August 25, 1999
Creator:
Boettger, J. S.
Object Type:
Report
System:
The UNT Digital Library
Engineering Analysis of Characterization Ramps and Platforms
The calculations in Appendix A and B determine the adequacy of the ramps and platforms to accomplish two tasks: (1) Core sampling using the modifications imposed by the use of a FDNW foundation at PFP; and (2) Core sampling within the 200E and 200W Tank Farms without the imposed modifications. The calculations in this document determined that the ramps and platforms are adequate for use with core sampling equipment when sampling either tank 241-2-361 or within 200E or 200W Tank Farms. When sampling tank 241-2-361 the modifications made by ECN 651132 must be implemented. These modifications are the addition of diagonal cross bracing on both the lateral and longitudinal sides. Also, a 1 1/4 inch tie rod must connect both bases of each longitudinal side.
Date:
August 25, 1999
Creator:
Boger, R. M.
Object Type:
Report
System:
The UNT Digital Library
Engineering Study of 500 ML Sample Bottle Transportation Methods
This engineering study reviews and evaluates all available methods for transportation of 500-mL grab sample bottles, reviews and evaluates transportation requirements and schedules and analyzes and recommends the most cost-effective method for transporting 500-mL grab sample bottles.
Date:
August 25, 1999
Creator:
Boger, R. M.
Object Type:
Report
System:
The UNT Digital Library