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255
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21
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9
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6
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5
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Degree Department
Country
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Year
Month
Day
Prior Year Accomplishments Can Opener Project
This report documents the work preformed on the project for Quality Evaluation Organization (QEO) from October 1998 through September 1999. Welded metal cans are used to store many components in the Y-12 Plant. The current process for opening these cans is to cut off the weld with hand operated nippers or shears. This causes excessive lid destruction and it also produces a rough and uneven edge that is difficult to reweld. (See Sketch 1) QEO personnel expressed a need for a better solution to these problems. Finding a better ''can opener'' that is quick and easy to use, reduces lid destruction, and produces a surface that enhances rewelding was the objective of this work.
Date:
September 30, 1999
Creator:
Speer, C.H.
Object Type:
Report
System:
The UNT Digital Library
Performance Assessment Uncertainty Analysis for Japan's HLW Program Feasibility Study (H12)
Most HLW programs in the world recognize that any estimate of long-term radiological performance must be couched in terms of the uncertainties derived from natural variation, changes through time and lack of knowledge about the essential processes. The Japan Nuclear Cycle Development Institute followed a relatively standard procedure to address two major categories of uncertainty. First, a FEatures, Events and Processes (FEPs) listing, screening and grouping activity was pursued in order to define the range of uncertainty in system processes as well as possible variations in engineering design. A reference and many alternative cases representing various groups of FEPs were defined and individual numerical simulations performed for each to quantify the range of conceptual uncertainty. Second, parameter distributions were developed for the reference case to represent the uncertainty in the strength of these processes, the sequencing of activities and geometric variations. Both point estimates using high and low values for individual parameters as well as a probabilistic analysis were performed to estimate parameter uncertainty. A brief description of the conceptual model uncertainty analysis is presented. This paper focuses on presenting the details of the probabilistic parameter uncertainty assessment.
Date:
August 30, 1999
Creator:
Baba, T.; Ishiguro, K.; Ishihara, Y.; Sawada, A.; Umeki, H.; Wakasugi, K. et al.
Object Type:
Article
System:
The UNT Digital Library
MASS MEASUREMENTS ALONG THE RP-PROCESS PATH.
The path and termination point for the t-p-process above {sup 56}Ni is uncertain due to a lack of knowledge of nuclear properties, especially masses, near the proton drip line. To address this need we have begun a program to measure masses of nuclei along the r-p-process pathway in the A{approximately}60-80 region using {beta}-{gamma} coincidence spectroscopy. Results for {sup 71}Se are presented and a preliminary experiment for {sup 72}Br is described.
Date:
August 30, 1999
Creator:
Brenner, D. S.
Object Type:
Article
System:
The UNT Digital Library
Construction safety program for the National Ignition Facility, July 30, 1999
The Construction Safety Program (CSP) for NIF sets forth the responsibilities, guidelines, rules, policies and regulations for all workers involved in the construction, special equipment installation, acceptance testing, and start-up of NIF at LLNL during the construction period of NIF. During this period, all workers are required to implement measures to create a universal awareness which promotes safe practice at the work site, and which will achieve NIF's management objectives in preventing accidents and illnesses. Construction safety for NIF is predicated on everyone performing their jobs in a manner that prevents job-related disabling injuries and illnesses. Integrated Safety Management (ISM) is practiced in the execution of all activities associated with the NIF Project. The seven Principles of ISM are: (1) Line management is responsible for safety. (2) Clear roles and responsibilities are established and maintained. (3) Personnel possess competence commensurate with responsibilities. (4) Resource allocations are balanced, making ES and H a priority in project planning and execution. (5) Safety requirements are identified and implemented. (6) Hazard controls are tailored to the project work. (7) Operations are authorized before work begins.
Date:
July 30, 1999
Creator:
Benjamin, D W
Object Type:
Report
System:
The UNT Digital Library
China PV Business and Applications Evaluation
This report provides an overview of photovoltaics (PV) business and applications in China. Although more than 70 million people in China are without access to grid electricity, many of the unelectrified regions benefit from considerable renewable resources, including good solar insolation. Current annual PV sales are still modest, however, and are estimated to be between 2.0 and 2.5 megawatts. This and other significant PV data, including information regarding the current status of key aspects of Chinese businesses, markets, and distribution channels, are included in the report. Detailed company profiles of Chinese business organizations and summaries of visits made to these companies (as well as to more remote sites in Inner Mongolia to examine PV usage by the end-use customer) in September-October 1998 are also presented.
Date:
August 30, 1999
Creator:
Sherring, Chris
Object Type:
Report
System:
The UNT Digital Library
Readiness Issues for Emergency Response Instrumentation
Issues in maintaining readiness of instruments for deployment and use in emergency response situations often differ from those in maintaining instruments for normal operations. Confunding circumstances include use or non-availability of check sources, ensuring instruments are always in calibration and operable, possible use of instruments in different climates, packaging of instrumentation for deployment, transport of instrumentation and check sources, and ensuring users are familiar with the instruments. Methods and procedures for addressing these issues are presented. Instrumentation used for survey, in situ measurements, electronic dosimetry, and air monitoring are discussed.
Date:
September 30, 1999
Creator:
Riland, C. A.; Bowman, D. R. & Tighe, R. J.
Object Type:
Article
System:
The UNT Digital Library
Grazing incidence liquid metal mirrors (GILMM) for radiation hardened final optics for laser inertial fusion energy power plants
A thin film of liquid metal is suggested as a grazing incident liquid metal mirror (GILMM) for robust final optics of a laser inertial fusion energy (IFE) power plant. The amount of laser light the mirror can withstand, called the damage limit, of a sodium film 85{sup o} from normal is calculated to be 57 J/cm{sup 2} normal to the beam for a 20 ns pulse and 1.3 J/cm{sup 2} for a 10 ps pulse of 0.35 {micro}m light (2 m{sup 2} and 90 m{sup 2} of mirror area per 100 kJ of laser energy at 20 ns and 10 ps, respectively). Feasibility relies on keep the liquid surface flat to the required accuracy by a combination of polished substrate, adaptive (deformable) optics, surface tension and low Reynolds number, laminar flow in the film. The film's substrate must be polished to {+-} 0.015 pm. Then surface tension keeps the surface smooth over short distances (<10 mm) and low Reynolds number laminar flow keeps the surface smooth by keeping the film thickness constant to less than + 0.01 w over long distance >10 mm. Adaptive optics techniques keep. the substrate flat to within {+-} 0.06 pm over 100 mm distance and …
Date:
June 30, 1999
Creator:
Moir, R W
Object Type:
Article
System:
The UNT Digital Library
Multilayer Thermionic Refrigeration
A review is presented of our program to construct an efficient solid state refrigerator based on thermionic emission of electrons over periodic barriers in the solid. The experimental program is to construct a simple device with one barrier layer using a three layers: metal-semiconductor-metal. The theoretical program is doing calculations to determine: (i) the optimal layer thickness, and (ii) the thermal conductivity.
Date:
August 30, 1999
Creator:
Mahan, G. D.
Object Type:
Article
System:
The UNT Digital Library
Video Monitoring and Control of the LENS Process
The LENS (Laser Engineered Net Shaping) process has significant potential impact to the manufacturing community in producing near-net shape rapid prototypes, tooling and customized small lot parts. LEINS has its roots in stereolithography and weld surfacing. Parts are built up in layers by delivering powder carried in an inert gas stream directed via nozzles to a laser-produced molten pool. A robust implementation of this technology requires a thorough understanding of how the thermal history during part fabrication influences the dimensions, microstructure and properties of the part. This understanding, in combination with effective closed loop feedback control of the process, and modeling of the part to be formed, is required to ensure routine fabrication of components with appropriate properties Thermal behavior at high temperatures (above 800 C) can be readily monitored by visible light radiation pyrometry. In this work a high speed digital camera with a narrow bandpass optical filter was used to obtain thermal images of the LENS process zone. The thermal imaging system was incorporated into the optical path of the laser so that the melt pool and adjacent areas of the part could be monitored without intrusive hardware add-ens at the lens/powder nozzle/process zone vicinity. The output of …
Date:
November 30, 1999
Creator:
HOFMEISTER,WILLIAM; KNOROVSKY,GERALD A. & MACCALLUM,DANNY O.
Object Type:
Article
System:
The UNT Digital Library
Thin-Film CIGS Photovoltaic Technology; Annual Technical Report, Phase I; 16 April 1998 - 15 April 1999
This report describes work performed by Energy Photovoltaics, Inc. (EPV) under Phase I of this subcontract. EPV's new FORNAX process for CIGS formation is capable of producing devices with high V{sub oc} (>600 mV) and no dark aging effects. Parameters of the best device so far are V{sub oc} = 611 mV, J{sub sc} = 27.5 mA/cm{sup 2}, FF = 74.5%, and efficiency = 12.5%. A 34-cm{sup 2} 16-cell minimodule was produced using FORNAX CIGS with V{sub oc} = 9.58 V, I{sub sc} = 52.0 mA, FF = 69.8%, and efficiency = 10.2%. A new version of EPV's linear evaporation source was developed with improved rate and uniformity for Cu deposition over a width of 45 cm. Using the new linear source, the FORNAX process was implemented on 0.43-m{sub 2} substrates in EPV's CIGS pilot line, with V{sub oc} = 537 mV and FF = 70.3% being achieved on a device. The EPV Subteam of the National CIS R&D Team has produced Cd-free ZnO/CIGS devices on NREL CIGS using the ROMEAO process (reaction of metal and atomic oxygen) for ZnO deposition. After soaking, the best device exhibited a V{sub oc} of 565 mV and an efficiency of 12.3%. Novel bias …
Date:
September 30, 1999
Creator:
Delahoy, A. E.; Chorobski, D.; Ziobro, F. & Kiss, Z. J. (Energy Photovoltaics, Inc.)
Object Type:
Report
System:
The UNT Digital Library
Radiative Decays, Nonet Symmetry and SU(3) Breaking
We re-examine the problem of simultaneously describing in a consistent way all radiative and leptonic decays of light mesons (V {yields} P{gamma}, P {yields} V{gamma}, P {yields} {gamma}{gamma}, V {yields} e{sup +}e{sup -}). For this purpose, we rely on the Hidden Local Symmetry model in both its anomalous and non-anomalous sectors. We show that the SU(3) symmetry breaking scheme proposed by Bando, Kugo and Yamawaki, supplemented with nonet symmetry breaking in the pseudoscalar sector, allows one to reach a nice agreement with all data, except for the K*{sup {+-}} radiative decay. An extension of this breaking pattern allows one to account for this particular decay mode too. Considered together, the whole set of radiative decays provides a pseudoscalar mixing angle {theta}{sub P} {approx_equal} and a value for {theta}{sub V} which is {approx_equal} 3{sup o} from that of ideal mixing. We also show that it is impossible, in a practical sense, to disentangle the effects of nonet symmetry breaking and those of glue inside the {eta}{prime}, using only light meson decays.
Date:
June 30, 1999
Creator:
O'Connell, Heath B
Object Type:
Report
System:
The UNT Digital Library
Recent Nuclear Astrophysics Data Activities in the US
Measurements in nuclear physics laboratories form the empirical foundation for new, realistic, sophisticated theoretical models of a wide variety of astrophysical systems. The predictive power of these models has, in many instances, a strong dependence on the input nuclear data, and more extensive and accurate nuclear data is required for these models than ever before. Progress in astrophysics can be aided by providing scientists with more usable, accurate, and significant amounts of nuclear data in a timely fashion in formats that can be easily incorporated into their models. A number of recent data compilations, evaluations, calculations, and disseminations that address nuclear astrophysics data needs will be described.
Date:
August 30, 1999
Creator:
Bardayan, D. W.; Blackmon, J. C.; Browne, E.; Firestone, R. B.; Hale, G. M.; Hoffman, R. D. et al.
Object Type:
Article
System:
The UNT Digital Library
Strangeness production in Au+Au collisions at the AGS: recent results from E917.
Strangeness production in Au+Au collisions has been measured via the yields of K{sup +} , K{sup {minus}} at 6, 8 AGeV and of {bar {Lambda}} at 10.8 AGeV beam kinetic energy in experiment E917. By varying the collision centrally and beam energy, a systematic search for indications of new phenomena and in-medium effects under high baryon density is undertaken.
Date:
March 30, 1999
Creator:
Chang, W.-C.; Back, B. B.; Betts, R. R.; Britt, H. C.; Chang, W. C.; Gillitzer, A. et al.
Object Type:
Article
System:
The UNT Digital Library
Relationship Between Casting Distortion, Mold Filling, and Interfacial Heat Transfer in Sand Molds
This project sought to determine the relationship between casting dimensions and interfacial heat transfer in aluminum alloy sand castings. The program had four parts; measurement of interfacial heat transfer coefficients in resin bonded and green sand molds, the measurement of gap formation in these molds, the analysis of castings made in varying gatings, orientations and thicknesses, and the measurement of residual stresses in castings in the as-cast and gate removed condition. New values for interfacial heat transfer coefficients were measured, a novel method for gap formation was developed, and the variation of casting dimensions with casting method, gating, and casting orientation in the mold was documented.
Date:
September 30, 1999
Creator:
Parker, J. K.; Woodbury, K. A.; Piwonka, T. S. & Owusu, Y.
Object Type:
Report
System:
The UNT Digital Library
Millimeter-wave imaging of thermal and chemical signatures.
Development of a passive millimeter-wave (mm-wave) system is described for remotely mapping thermal and chemical signatures of process effluents with application to arms control and nonproliferation. Because a large amount of heat is usually dissipated in the air or waterway as a by-product of most weapons of mass destruction facilities, remote thermal mapping may be used to detect concealed or open facilities of weapons of mass destruction. We have developed a focal-plane mm-wave imaging system to investigate the potential of thermal mapping. Results of mm-wave images obtained with a 160-GHz radiometer system are presented for different target scenes simulated in the laboratory. Chemical and nuclear facilities may be identified by remotely measuring molecular signatures of airborne molecules emitted from these facilities. We have developed a filterbank radiometer to investigate the potential of passive spectral measurements. Proof of principle is presented by measuring the HDO spectral line at 80.6 GHz with a 4-channel 77-83 GHz radiometer.
Date:
March 30, 1999
Creator:
Gopalsami, N.
Object Type:
Article
System:
The UNT Digital Library
Aerial Radiation Detection
An airborne system designed for the detection of radioactive sources on the soil surface from an aircraft normally senses gamma rays emitted by the source. Gamma rays have the longest path length (least attenuation) through the air of any of the common radioactive emissions and will thus permit source detection at large distances. A secondary benefit from gamma rays detection if that nearly all radioactive isotopes can be identified by the spectrum of gammas emitted. Major gaseous emissions from fuel processing plants emit gammas that may be detected and identified. Some types of special nuclear material also emit neutrons which are also useful for detection at a distance.
Date:
September 30, 1999
Creator:
Quam, W. M.
Object Type:
Report
System:
The UNT Digital Library
Choices for A Brighter Future: Perspectives on Renewable Energy
The report discusses the perspectives on the evolving U.S. electricity future, the renewable electric technology portfolio, the regional outlook, and the opportunities to move forward. Renewables are at a critical juncture as the domestic electricity marketplace moves toward an era of increased choice and greater diversity. The cost and performance of these technologies have improved dramatically over the past decade, yet their market penetration has stalled as the power industry grapples with the implications of the emerging competitive marketplace. Renewable energy technologies already contribute to the global energy mix and are ready to make an even greater contribution in the future. However, the renewables industry faces critical market uncertainties, both domestically and internationally, as policy commitments to renewables at both the federal and state levels are being reshaped to match the emerging competitive marketplace. The energy decisions that we make, or fail to make, today will have long-lasting implications. We can act now to ensure that renewable energy will play a major role in meeting the challenges of the evolving energy future. We have the power to choose.
Date:
September 30, 1999
Creator:
National Renewable Energy Laboratory (U.S.)
Object Type:
Book
System:
The UNT Digital Library
Regeneration of Hydrotreating and FCC Catalysts
Hydrotreating, hydrocracking, and fluid catalytic cracking (FCC) catalysts are important components of petroleum refining processes. Hydrotreating and hydrocracking catalysts are used to improve the yield of high-quality light oil fractions from heavier crude oil and petroleum feedstocks containing high levels of impurities. FCC catalysts improve the yield of higher octane gasoline from crude oil. Residuum hydrotreating and cracking catalysts are susceptible to irreversible deactivation caused by adsorption of sulfur and by metals impurities, such as vanadium and nickel. The gradual buildup of these impurities in a hydrotreating catalyst eventually plugs the pores and deactivates it. Nickel and vanadium adversely affect the behavior of cracking catalysts, reducing product yield and quality. Replacing deactivated catalysts represents a significant cost in petroleum refining. Equally important are the costs and potential liabilities associated with treating and disposing spent catalysts. For example, recent US Environmental Protection Agency rulings have listed spent hydrotreating and hydrorefining catalysts as hazardous wastes. FCC catalysts, though more easily disposed of as road-base or as filler in asphalt and cement, are still an economic concern mainly because of the large volumes of spent catalysts generated. New processes are being considered to increase the useful life of catalysts or for meeting more …
Date:
September 30, 1999
Creator:
Wai, C. M.; Frye, J. G.; Fulton, J. L.; Bowman, L. E.; Silva, L. J. & Gerber, M. A.
Object Type:
Report
System:
The UNT Digital Library
Occupational Safety and Health Program at the West Valley Demonstration Project
The West Valley Nuclear Services Co. LLC (WVNS) is committed to provide a safe, clean, working environment for employees, and to implement U.S. Department of Energy (DOE) requirements affecting worker safety. The West Valley Demonstration Project (WVDP) Occupational Safety and Health Program is designed to protect the safety, health, and well-being of WVDP employees by identifying, evaluating, and controlling biological, chemical, and physical hazards in the work place. Hazards are controlled within the requirements set forth in the reference section at the end of this report. It is the intent of the WVDP Occupational Safety and Health Program to assure that each employee is provided with a safe and healthy work environment. This report shows the logical path toward ensuring employee safety in planning work at the WVDP. In general, planning work to be performed safely includes: combining requirements from specific programs such as occupational safety, industrial hygiene, radiological control, nuclear safety, fire safety, environmental protection, etc.; including WVDP employees in the safety decision-making processes; pre-planning using safety support re-sources; and integrating the safety processes into the work instructions. Safety management principles help to define the path forward for the WVDP Occupational Safety and Health Program. Roles, responsibilities, and authority …
Date:
April 30, 1999
Creator:
Calderon, L. M.
Object Type:
Report
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 28, No. 27, Ed. 1 Friday, April 30, 1999
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
April 30, 1999
Creator:
Pace, Joshua
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Levelland and Hockley County News-Press (Levelland, Tex.), Vol. 21, No. 26, Ed. 1 Wednesday, June 30, 1999
Semiweekly newspaper from Levelland, Texas that includes local, state, and national news along with advertising.
Date:
June 30, 1999
Creator:
Rigg, John
Object Type:
Newspaper
System:
The Portal to Texas History
Levelland and Hockley County News-Press (Levelland, Tex.), Vol. 21, No. 17, Ed. 1 Sunday, May 30, 1999
Semiweekly newspaper from Levelland, Texas that includes local, state, and national news along with advertising.
Date:
May 30, 1999
Creator:
Rigg, John
Object Type:
Newspaper
System:
The Portal to Texas History
Texas Register, Volume 24, Number 18, Pages 3265-3390, April 30, 1999
A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.
Date:
April 30, 1999
Creator:
Texas. Secretary of State.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
[Funeral Program for Frank Bryant, Jr., December 30, 1999]
Funeral program for Frank Bryant, Jr., M.D., born December 13, 1930. The funeral was held Thursday, December 30, 1999 at Second Baptist Church, officiated by Rev. Robert L. Jemerson, Pastor. Funeral arrangements were made through Sutton-Sutton Mortuary and he was buried in Fort Sam Houston National Cemetery near San Antonio, Texas.
Date:
December 30, 1999
Creator:
unknown
Object Type:
Pamphlet
System:
The Portal to Texas History