Serial/Series Title
Proceedings of the Workshop on Geothermal Reservoir Engineering
11
Fiscal Year 2000
3
Carbon Sequestration on Surface Mine Lands Quarterly Report
2
Downhole Power Generation and Wireless Communications for Intelligent Completions Applications, Quarterly Report
2
Federal Emergency Management Information System (FEMIS)
2
Fiscal Year 1990
2
Fiscal Year 1999
2
Fiscal Year 2001
2
Improved Miscible Nitrogen Flood Performance Utilizing Advanced Reservoir Characterization and Horizontal Laterals in a Class I Reservoir - East Binger (Marchand) Unit Quarterly Report
2
Low-Cost Solar Array Project
2
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Safety assessment document for the dynamic test complex (Building 836)
A safety assessment was performed to determine if potential accidents at the 836 Complex at Site 300 could present undue hazards to the general public, personnel at Site 300, or have an adverse effect on the environment. The credible accidents that might have an effect on these facilities or have off-site consequences were considered. These were earthquake, extreme wind (including missiles), lightning, flood, criticality, high explosive (H) detonation that disperses uranium and beryllium, spontaneous oxidation of plutonium, explosions due to finely divided particles, and a fire.
Date:
November 24, 1981
Creator:
Odell, B.N. & Pfeifer, H.E.
Object Type:
Report
System:
The UNT Digital Library
Theory-based transport simulations of TFTR L-mode temperature profiles
The temperature profiles from a selection of TFTR L-mode discharges are simulated with the 1-1/2-D BALDUR transport code using a combination of theoretically derived transport models, called the Multi-Mode Model. The present version of the Multi-Mode Model consists of effective thermal diffusivities resulting from trapped electron modes and ion temperature gradient ({eta}{sub i}) modes, which dominate in the core of the plasma, together with resistive ballooning modes, which dominate in the periphery. Within the context of this transport model and the TFTR simulations reported here, the scaling of confinement with heating power comes from the temperature dependence of the {eta}{sub i} and trapped electron modes, while the scaling with current comes mostly from resistive ballooning modes. 24 refs., 16 figs., 3 tabs.
Date:
October 24, 1991
Creator:
Bateman, G.
Object Type:
Report
System:
The UNT Digital Library
(Fourth international conference on fusion reactor materials)
This report summarizes the International Conference on Fusion Reactor Materials (ICFRM-4) which was held December 4--9, 1989, in Kyoto, Japan, as well as the results of several workshops, planning meetings, and laboratory visits made by the travelers. The ICFRM-4 is the major forum to present and exchange information on materials research and development in support of the world's fusion development efforts. About 360 papers were presented by the 347 conference attendees. Highlights of the conference are presented. A proposal by the United States to host ICFRM-5 was accepted by the International Advisory Committee. ORNL will be the host laboratory. A meeting of the DOE/JAERI Annex I Steering Committee to review the US/Japan Collaborative Testing of First Wall and Blanket Structural Materials with Mixed Spectrum Fission Reactors was held at JAERI Headquarters on December 1. The Japanese emphasized the critical importance of a resumption of HFIR operation. Even though the HFIR outage has lasted three plus years this program has continued to provide new and important data on materials behavior which has particular relevance to ITER.
Date:
January 24, 1990
Creator:
Bloom, E. E.
Object Type:
Report
System:
The UNT Digital Library
High performance inertial fusion targets
Inertial confinement fusion (ICF) designs are considered which may have very high gains (approximately 1000) and low power requirements (<100 TW) for input energies of approximately one megajoule. These include targets having very low density shells, ultra thin shells, central ignitors, magnetic insulation, and non-ablative acceleration.
Date:
August 24, 1977
Creator:
Nuckolls, J.H.; Bangerter, R.O.; Lindl, J.D.; Mead, W.C. & Pan, Y.L.
Object Type:
Article
System:
The UNT Digital Library
Pion induced double-charge exchange above the resonance
The zero degree excitation function for ({pi}{sup +}, {pi}{sup -}) is calculated for pion energies of 300 to 1400 MeV assuming a sequential mechanism. The cross section around 1225 MeV is 10{sup 4} smaller than at 800 MeV. Experiments at this energy should be ideal for searches for effects due to exchange currents, and other non-conventional mechanisms. 15 refs.
Date:
October 24, 1989
Creator:
Oset, E.; Strottman, D. (Valencia Univ. (Spain). Dept. de Fisica Teorica & Los Alamos National Lab., NM (USA))
Object Type:
Article
System:
The UNT Digital Library
Fallout model for system studies
A versatile fallout model was developed to assess complex civil defense and military effect issues. Large technical and scenario uncertainties require a fast, adaptable, time-dependent model to obtain technically defensible fallout results in complex demographic scenarios. The KDFOC2 capability, coupled with other data bases, provides the essential tools to consider tradeoffs between various plans and features in different nuclear scenarios and estimate the technical uncertainties in the predictions. All available data were used to validate the model. In many ways, the capability is unmatched in its ability to predict fallout hazards to a society.
Date:
October 24, 1979
Creator:
Harvey, T. F. & Serduke, F. J. D.
Object Type:
Report
System:
The UNT Digital Library
General Chemistry Division quarterly report, January--March 1977
Reported are: development of analytical capabilities of a submillimeter spectrometer; improved minimum detectibility of laser-induced molecular fluorescence; use of laser photoionization sources for analytical mass spectrometry; photoacoustic spectroscopy of solids; development of time-resolved spectroscopy for multicomponent mixtures; excited-state reactions of Ba/sup +/ + N/sub 2/O ..-->.. BaO +N/sub 2/; development of an ion-cyclotron-resonance spectrometer; development of glow-discharge multielement analytical systems; analysis of deposits on exploding gold bridgeware detonators; results of /sup 13/C-NMR study of toluene-2,4-diisocyanate polymers; analysis of 1,6-hexanediamine and 1,3-dipiperiodylpropane; studies of discrepancies between chromatographic and mass spectrometric data. (JRD)
Date:
June 24, 1977
Creator:
Harrar, J.E. (ed.)
Object Type:
Report
System:
The UNT Digital Library
Goose River, Maine, demonstration project, January 1978-October 1978. Final report
The proposed Goose River Project is a commercial power development consisting of 4 power dams and one storage dam. All available energy is to be wholesaled to the Central Maine Power Company, the utility holding the franchise for the area. A description of the economic feasibility of the proposed project is presented.
Date:
November 24, 1978
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
324 building safety analysis report supplement
Process engineering designs, major equipment and plant facilities to be utilized in commercial nuclear waste preparation and vitrification in the 324 Radiochemical Engineering Building are reviewed with regard to accident potential and consequences. This Safety Analysis Report Supplement compares calculated environmental doses anticipated from the Commercial Nuclear Waste Vitrification Project (CNWVP) routine operations with the average doses from past waste management operations conducted at the Hanford Project and finds them to be significantly less. The calculated CNWVP environmental doses are found to be far below presently applicable ERDA standards and standards proposed by the EPA for nuclear power operations. (DLC)
Date:
June 24, 1977
Creator:
Dodd, A. O. & Wittenbrock, N. G.
Object Type:
Report
System:
The UNT Digital Library
Optical coatings for laser fusion applications
Lasers for fusion experiments use thin-film dielectric coatings for reflecting, antireflecting and polarizing surface elements. Coatings are most important to the Nd:glass laser application. The most important requirements of these coatings are accuracy of the average value of reflectance and transmission, uniformity of amplitude and phase front of the reflected or transmitted light, and laser damage threshold. Damage resistance strongly affects the laser's design and performance. The success of advanced lasers for future experiments and for reactor applications requires significant developments in damage resistant coatings for ultraviolet laser radiation.
Date:
April 24, 1980
Creator:
Lowdermilk, W.H.; Milam, D. & Rainer, F.
Object Type:
Article
System:
The UNT Digital Library
Potential impacts of artificial intelligence expert systems on geothermal well drilling costs:
The Geothermal research Program of the US Department of Energy (DOE) has as one of its goals to reduce the cost of drilling geothermal wells by 25 percent. To attain this goal, DOE continuously evaluates new technologies to determine their potential in contributing to the Program. One such technology is artifical intelligence (AI), a branch of computer science that, in recent years, has begun to impact the marketplace in a number of fields. Expert systems techniques can (and in some cases, already have) been applied to develop computer-based ''advisors'' to assist drilling personnel in areas such as designing mud systems, casing plans, and cement programs, optimizing drill bit selection and bottom hole asssembly (BHA) design, and alleviating lost circulation, stuck pipe, fishing, and cement problems. Intelligent machines with sensor and/or robotic directly linked to AI systems, have potential applications in areas of bit control, rig hydraulics, pipe handling, and pipe inspection. Using a well costing spreadsheet, the potential savings that could be attributed to each of these systems was calculated for three base cases: a dry steam well at The Geysers, a medium-depth Imerial Valley well, and a deep Imperial Valley well. Based on the average potential savings to be …
Date:
November 24, 1987
Creator:
Satrape, J.V.
Object Type:
Report
System:
The UNT Digital Library
Power recovery system for coal-liquefaction process. [Patent application]
Method and apparatus for minimizing energy required to inject reactant such as coal-oil slurry into a reaction vessel, using high pressure effluent from the latter to displace the reactant from a containment vessel into the reaction vessel with assistance of low pressure pump. Effluent is degassed in the containment vessel, and a heel of the degassed effluent is maintained between incoming effluent and reactant in the containment vessel.
Date:
April 24, 1981
Creator:
Horton, J. R.
Object Type:
Patent
System:
The UNT Digital Library
The effect of yield strength on side-bonding upset welds
During the course of 9{degree} tapered side-bonding resistance upset weld development at Mound, various studies have been conducted to evaluate the effect of yield strength on welds in 304L stainless steel. The results of these studies have concluded that at high yield strengths there may be a minor reduction in the length of Class 2 or better bond. Satisfactory welds have been produced with materials having yield strengths ranging from 36.0 to 141.0 ksi. However, when body yield strengths exceed 80.0 ksi a minor decrease in bond lengths begins. A significant inverse relationship between stem yield strength and bond length was shown to exist. 8 refs., 9 figs., 10 tabs.
Date:
September 24, 1991
Creator:
Miller, R. G. & Perkins, M. A.
Object Type:
Report
System:
The UNT Digital Library
Simulations of intermediate density laser fusion targets: recent progress in design and analysis
The attainment of low-adiabat compression to high final state density is essential for achieving high gain thermonuclear micro-implosions. Using 1- and 2-dimensional numerical simulations with LASNEX, the target performance which can be expected and the limitations imposed by absorption heating, and transport for targets designed to reach 100 x liquid DT density (20g/cm/sup 3/) are discussed. The requirements imposed by the need for low preheat, adequate implosion symmetry, and the behavior of fluid instabilities are discussed for these recent target designs. Methods for diagnosis of density are discussed.
Date:
August 24, 1977
Creator:
Mead, W. C.; Lindl, J. D.; Nuckolls, J. H.; Larsen, J. T.; Bailey, D. S. & Pan, Y. L.
Object Type:
Article
System:
The UNT Digital Library
Coal gasification apparatus. [Patent application]
Coal hydrogenation vessel has hydrogen heating passages extending vertically through its wall and opening into its interior.
Date:
April 24, 1981
Creator:
Nagy, C.K.
Object Type:
Patent
System:
The UNT Digital Library
Finite-element stress and deflection analysis of CDF yoke and end plug
A large detector is being designed to study anti pp collisions at center-of-mass energies of up to 2000 GeV as part of the Fermilab Collider Detector Facility (CDF). The central detector of this facility consists of a solenoid, calorimeter yoke, and a variety of particle measurement devices. The yoke will be a large steel structure that will provide the magnetic flux return path as well as support structure for calorimetry and other instrumentation. It must resist both electromagnetic and gravitational loads while exhibiting only small elastic deformations. The instrumented endplugs of the yoke are subjected to large electromagnetic loads. Moreover, due to the presence of wire chambers within these plugs, they must also be particularly stiff. The purpose of this paper is to present the results of a finite element stress and deflection analysis of these structures under various anticipated load conditions. The PATRAN-G finite element modeling program, installed on a CDF-VAX 11/780 and operating from a Ramtek 6212 colorgraphics terminal, was used to generate the analysis models. The actual finite element analysis was performed by the ANSYS general purpose finite element program, installed on the Fermilab Cyber 175's.
Date:
May 24, 1982
Creator:
Wands, R.; Grimson, J.; Kephart, R. & Theriot, D.
Object Type:
Report
System:
The UNT Digital Library
Development of More Efficacious Tc-99m Organ Imaging Agents for Use in Nuclear Medicine by Analytical Characterization of Radiopharmaceutical Mixtures
The long-range objective of this research program is the development of more efficacious technetium-99m radiopharmaceuticals for use as imaging agents in diagnostic nuclear medicine. We seek to isolate and develop distinct site imaging agents, each of which has properties optimized to provide diagnostic information concerning a given pathological condition. The specific objectives during the period (9/1/89 to 8/31/92) include: (1) Development of strategies for improving yields of specific Tc-diphosphonate complexes with optimum imaging properties; (2) Development of electrodes for rapid in situ electrochemical generation of skeletal imaging agents; (3) Development of electrochemical sensors for {Tc} and Re imaging agents; (4) Characterization of stable {Tc}- and Re-diphosphonate complexes obtainable in high yield by structural studies with techniques such as NMR, EXAFS, and Raman spectroscopy; (5) Development of improved separation techniques for the characterization of diphosphonate skeletal imaging agents; (6) Evaluation of the effect of the biological milieu on {Tc}-diphosphonate complexes; and (7) Electrochemical studies of technetium and rhenium complexes synthesized by Professor Deutsch's research group for heart and brain imaging.
Date:
January 24, 1992
Creator:
Heineman, W. R.
Object Type:
Report
System:
The UNT Digital Library
Multiple electron capture in close ion-atom collisions
Collisions in which a fast highly charged ion passes within the orbit of K electron of a target gas atom are selected by emission of a K x-ray from the projectile or target. Measurement of the projectile charge state after the collision, in coincidence with the K x-ray, allows measurement of the charge-transfer probability during these close collisions. When the projectile velocity is approximately the same as that of target electrons, a large number of electrons can be transferred to the projectile in a single collision. The electron-capture probability is found to be a linear function of the number of vacancies in the projectile L shell for 47-MeV calcium ions in an Ar target. 18 refs., 9 figs.
Date:
July 24, 1989
Creator:
Schlachter, A. S.; Stearns, J. W.; Berkner, K. H.; Bernstein, E. M.; Clark, M. W.; DuBois, R. D. et al.
Object Type:
Article
System:
The UNT Digital Library
Transistorized power switch and base drive circuit therefore
A high power switching circuit is disclosed which utilizes a four-terminal Darlington transistor block to improve switching speed, particularly in rapid turn-off. Two independent reverse drive currents are utilized during turn-off in order to expel the minority carriers of the Darlington pair at their own charge sweep-out rate. The reverse drive current may be provided by a current transformer, the secondary of which is tapped to the base terminal of the power stage of the Darlington block. In one application, the switching circuit is used in each power switching element in a chopper-inverter drive of an electric vehicle propulsion system.
Date:
March 24, 1981
Creator:
Lee, F.C. & Carter, R.A.
Object Type:
Patent
System:
The UNT Digital Library
Modeling of transformation toughening in brittle materials
Results from modeling of transformation toughening in brittle materials using a discrete micromechanical model are presented. The material is represented as a two-dimensional triangular array of nodes connected by elastic springs. Microstructural effects are included by varying the spring parameters for the bulk, grain boundaries, and transforming particles. Using the width of the damage zone and the effective compliance (after the initial creation of the damage zone) as measures of fracture toughness, we find that there is a strong dependence of toughness on the amount, size, and shape of the transforming particles, with the maximum toughness achieved with the higher amounts of the larger particles.
Date:
January 24, 1992
Creator:
LeSar, R.; Rollett, A.D. (Los Alamos National Lab., NM (United States)) & Srolovitz, D.J. (Michigan Univ., Ann Arbor, MI (United States). Dept. of Materials Science and Engineering)
Object Type:
Article
System:
The UNT Digital Library
Analytical chemical system for the determination of heavy metals and organic compounds. Annual progress report, December 1, 1978-November 30, 1979
Progress has been made in the synthesis and characterization of new resins for sequestering inorganic and organic compounds. The capabilities of the poly(dithiocarbamate) resin have been extended, a new poly(acrylamidoxime) resin prepared and characterized, and a series of resins for organic compounds prepared and tested. Limited actual sample analyses have been performed with these resins. A new inductively coupled plasma source, spectrometer, and computer system have been received and they are undergoing tests and installation. With this system in place, the multielement analysis of metals during the forthcoming period will insure the application of sequestering resins to practical analysis of energy-related materials. An automated sample handling and data system has been designed, some components purchased, and construction is scheduled for 1980.
Date:
October 24, 1979
Creator:
Siggia, S. & Barnes, R. M.
Object Type:
Report
System:
The UNT Digital Library
Improved method of preparing composite superconducting wire
An improved method of preparing composite multifilament superconducting wire of Nb/sub 3/Sn in a copper matrix which eliminates the necessity of coating the drawn wire with tin is described. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb/sub 3/Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.
Date:
April 24, 1981
Creator:
Verhoeven, J. D.; Gibson, E. D.; Finnemore, D. K.; Ostenson, J. E.; Schmidt, F. A. & Owen, C. V.
Object Type:
Patent
System:
The UNT Digital Library
Analysis of dense pusher laser-driven implosions for intermediate densities
Post-shot analysis of targets designed to achieve a diagnosible compression of DT gas to 2. g/cm/sup 3/ or 10 x liquid density is reported. The SHIVA laser provided 15 to 20 TW of 1.06 ..mu..m laser light. Detailed comparisons of diagnostic results with hydro-code calculations are made. Implications for laser light absorption/scattering, thermal conduction, suprathermal electron preheat, implosion symmetry, and pusher-fuel mix are discussed. Uncertainties of the density determination methods are analyzed. Good overall consistency is found, indicating strong support for the successful attainment of 1.-3. g/cm/sup 3/.
Date:
October 24, 1979
Creator:
Mead, W. C.; Orth, C. D.; Bailey, D. S.; McClellan, G. & Estabrook, K. G.
Object Type:
Article
System:
The UNT Digital Library
Silicon drift chamber studies for the RHIC STAR experiment
The two-hit resolution of a silicon drift chamber is measured using a pulsed Nd:Yag laser and a time digitizer readout. The data is analyzed by forming the covariance matrix in time samples, and transforming to a matrix in amplitude and time variation of each of the two hits. The resolution of the two-hit separation is found to be better than 25 microns with a drift field of 530 V/cm and a separation of more than 500 microns, with the resolution increasing to 50 microns as the separation nears 500 microns. Results are also presented for multiply ionizing tracks, showing a great improvement over single minimum ionizing. 8 refs.
Date:
February 24, 1992
Creator:
Humanic, T.J.
Object Type:
Report
System:
The UNT Digital Library