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Status of the Tau-Charm Facility and highlights of its physics program
In this paper I will first discuss the history and current status of the Tau-Charm Facility. I will then focus on the unique aspects of the heavy meson and tau physics program of such a facility, which motivates its construction and operation in the mid-1090's.
Date:
February 1, 1990
Creator:
Schindler, R. H.
Object Type:
Article
System:
The UNT Digital Library
Development of coring, consolidating, subterrene penetrators
Coring penetrators offer two advantages over full face-melting penetrators, i.e., formation of larger boreholes with no increase in power and the production of glass-lined, structurally undisturbed cores which can be recovered with conventional core-retrieval systems. These cores are of significant value in geological exploratory drilling programs. The initial design details and fabrication features of a 114-mm-diam coring penetrator are discussed; significant factors for design optimization are also presented. Results of laboratory testing are reported and compared with performance predictions, and an initial field trial is described.
Date:
February 1, 1976
Creator:
Murphy, H. D.; Neudecker, J. W.; Cort, G. E.; Turner, W. C.; McFarland, R. D. & Griggs, J. E.
Object Type:
Report
System:
The UNT Digital Library
Coal technology program. Progress report for December 1976
This report, the twenty-ninth of a series, is a compendium of monthly progress reports for the ORNL research and development programs that are in support of the increased utilization of coal as a source of clean energy. The projects reported this month include those for coal conversion process development, materials engineering, alkali metal vapor topping cycles, a critical components test facility, engineering and support studies, process and program assistance, environmental assessment studies, and coal-fueled MIUS.
Date:
February 1, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Experimental and analytical research on the aerodynamics of wind turbines. Mid-term technical report, June 1--December 31, 1975
The successful development of reliable, cost competitive horizontal axis, propeller-type wind energy conversion systems (WECS) is strongly dependent on the availability of advanced technology for each of the system components. Past experience and current studies of this type of wind energy conversion systems have shown that the wind turbine subsystem most significantly effects the system's cost effectiveness and performance capability. Thus adequate technology bases are essential for all elements of the wind turbine design. Information is presented concerning aerodynamic design and performance technology, wind turbine parametric performance study, selection of model wind turbine configurations, and structural design of wind turbine models.
Date:
February 1, 1976
Creator:
Rohrbach, C.
Object Type:
Report
System:
The UNT Digital Library
Recollections on the development of preequilibrium decay models
This paper contains a review of some of the accomplishments of the pre-equilibrium decay models. 23 refs. (LSP)
Date:
February 1, 1988
Creator:
Blann, M.
Object Type:
Article
System:
The UNT Digital Library
First wall response to energy disposition in conceptual laser fusion reactors
Discussed are energy depositions in the first wall of various proposed laser-fusion reactors and the effect of pulse time on the stress and temperature in the first wall. Simple models can be used to estimate the temperature and stress rise from x-rays and neutrons. More complex analysis is needed to estimate the response of the first wall to reflected laser light and the pellet debris.
Date:
February 1, 1976
Creator:
Hovingh, J.
Object Type:
Article
System:
The UNT Digital Library
Fission cross section of /sup 243/Cm from the underground nuclear explosion, Physics-8. Table of values. [15 eV to 3 MeV]
The neutron-induced fission cross section of /sup 243/Cm was measured from 15 eV to 3 MeV in a time-of-flight experiment which used the intense, single-pulse neutron source provided by the underground nuclear explosion Physics-8 and a 240-m, evacuated flight path. The cross section reported here has been channelized into 1 ..mu..s bins. Typical uncertainties for each data point are +-10 percent nonsystematic and +-10 percent systematic.
Date:
February 1, 1976
Creator:
Silbert, M. G.
Object Type:
Report
System:
The UNT Digital Library
Silicon materials task of the low cost solar array project (Part 2). First Quarterly report, 1 October 1975--31 December 1975. Research report 76-9C4-SIMAT-R1
The objective of this program, Part 2 of the Silicon Materials Task, is to develop and define purity requirements for solar cell grade (SG) silicon material by evaluating the effects of specific impurities and impurity levels on the performance of silicon solar cells. The basic approach of the program is to establish, as unambiguously as possible, what concentrations of the impurities commonly found in silicon starting material (metallurgical grade silicon) can be tolerated in silicon crystals produced by both the standard Czochralski and the dendritic-web sheet (rapid growth) methods without degrading solar cell performance. The program is on schedule in all elements. Specifically the growth, evaluation, solar cell fabrication and testing are completed for the baseline boron-doped Czochralski material. Cell efficiencies are in the 11 to 13 percent range (AM1). The growth of six first generation Czochralski crystals (boron doping plus Cr, Mn, Cu, Ni, V, and Ti) is completed. Solar cell measurements on four of the first doubly-doped ingots indicate that Cr and Mn seriously degrade cell performance at the 10/sup 15/ cm/sup -3/ doping level while neither Ni nor Cu produce any significant reduction in cell efficiency. The results for Ni can be rationalized on the basis of …
Date:
February 20, 1976
Creator:
Hopkins, R. H.; Davis, J. R.; Rai-Choudhury, P.; Blais, P. D. & McCormick, J. R.
Object Type:
Report
System:
The UNT Digital Library
Development of high efficiency collector plates. Final report
Composite metal technology was used to manufacture intermetallic compound (IC) absorption surfaces and to combine them integrally with composite metal tube-in-sheet collector plates. Five material systems in which Al was one component metal and Fe, Cr, or Ni and their alloy was the other pair, were evaluated. All intermetallic compounds had high solar absorptance ..cap alpha.. approx. = 0.9. The AlNi was most promising and ..cap alpha.. > or = 0.95 and epsilon approx. = 0.3 were obtained over a broad range of compounding conditions. After eight months exposure in a flat plate collector enclosure the characteristic properties of AlNi surfaces remained virtually unchanged. Only LCS/Cu composite metal tube-in-sheet collector plates could be manufactured successfully. The technical difficulties associated with integrating the intermetallic compound and tube-in-sheet technologies make the manufacturing of composite metal collector plates at the time being economically unfeasible.
Date:
February 1976
Creator:
Santala, T. & Sabol, R.
Object Type:
Report
System:
The UNT Digital Library
Monitoring sinusoidal vibration environments with a television system
The development and prove-in work of this experiment established a technology for using television equipment to monitor hybrid microcircuits and other miniature assemblies in sinusoidal vibration environments. Production assemblies were run through sine vibration test sequences with television systems used to monitor the sequences. During the experiment different television lens systems were tried to obtain clean, sharp, highly magnified pictures of the assemblies being monitored. Successful monitoring of production assemblies during the experiment was accomplished, resulting in design changes to the assemblies and establishment of a television monitoring system.
Date:
February 1, 1975
Creator:
Davis, J. W.; Anderson, F. O.; Lookabill, H. J. & Taylor, R. D.
Object Type:
Report
System:
The UNT Digital Library
Postirradiation results and evaluation of helium-bonded uranium--plutonium carbide fuel elements irradiated in EBR-II. Interim report. [LMFBR]
An evaluation was made of the performance of 74 helium-bonded uranium-plutonium carbide fuel elements that were irradiated in EBR-II at 38-96 kW/m to 2-12 at. percent burnup. Only 38 of these elements have completed postirradiation examination. The higher failure rate found in fuel elements which contained high-density (greater than 95 percent theoretical density) fuel than those which contained low-density (77-91 percent theoretical density) fuel was attributed to the limited ability of the high-density fuel to swell into the void space provided in the fuel element. Increasing cladding thickness and original fuel-cladding gap size were both found to influence the failure rates for elements containing low-density fuel. Lower cladding strain and higher fission-gas release were found in high-burnup fuel elements having smear densities of less than 81 percent. Fission-gas release was usually less than 5 percent for high-density fuel, but increased with burnup to a maximum of 37 percent in low-density fuel. Maximum carburization in elements attaining 5-10 at. percent burnup and clad in Types 304 or 316 stainless steel and Incoloy 800 ranged from 36-80 ..mu..m and 38-52 ..mu..m, respectively. Strontium and barium were the fission products most frequently found in contact with the cladding but no penetration of the …
Date:
February 1, 1976
Creator:
Latimer, T. W.; Barner, J. O.; Kerrisk, J. F. & Green, J. L.
Object Type:
Report
System:
The UNT Digital Library
Accelerator technology for bright radiation beam
We review the current and future accelerator technologies for generation of high brightness radiation beam.
Date:
February 1, 1992
Creator:
Kim, Kwang-Je.
Object Type:
Article
System:
The UNT Digital Library
Nonlinear excitations in anisotropic X-Y models. Report No. 2599
A 1-D ferrodisortive X--Y model is considered and the importance of phase-amplitude coupling in the dominant low T elementary excitations is illustrated.
Date:
February 1, 1976
Creator:
Bishop, A. R. & Currie, J. F.
Object Type:
Report
System:
The UNT Digital Library
Biological Processes in the Water Column of the South Atlantic Bight. Progress Report, July 12--August 20, 1976
Preliminary results are reported from a study of the relationship between intrusions of phytoplankton, zooplankton, and particulate matter in the South Atlantic Bight off the coast of Georgia and Northeast Florida. The relationship between temperature, chlorophyll, and particle volume in bottom water from various locations was determined and the data were correlated with data on water mass movements. Samples were collected from a ship following a specified grid pattern.
Date:
February 1, 1977
Creator:
Paffenhofer, G. A. & Dunstan, W. M.
Object Type:
Report
System:
The UNT Digital Library
Modifications to the HELAP code. [GCFR steam generator model]
The improvements made to the steam generator model originally developed for the HELAP code and improvements made to the HELAP code itself are described. In the first case, the numerical algorithm which solves the controlling equations of the steam generator was re-cast into a purely implicit scheme. This change was motivated by excessive running time and numerical instabilities brought about by rapidly varying heat transfer coefficients when the fluid changes phase. The second of the above mentioned changes was the inclusion of closed form expressions to describe the thermodynamic properties on the primary (helium) side rather than the table look up technique. These expressions treat the helium as a real gas. This step has two advantages: first, the limits customarily imposed by a table are eliminated, and second, the determination of new pressures, temperatures and enthalpies at each time step are accomplished more rapidly. Finally, an outline is given of the extra input required to execute a problem using HELAP.
Date:
February 1, 1976
Creator:
Ludewig, H
Object Type:
Report
System:
The UNT Digital Library
A relation merging technique for relational databases
Relation merging is employed in relational databases in order to reduce the need for joining relations. Merging, however, can create unnormalized relations. In this paper we propose a merging technique that preserves the high (Boyce-Codd) normal form of relational schemas consisting of relation-schemes, key dependencies, referential integrity constraints, and null constraints. The additional constraints generated by this merging technique can be effectively maintained using the mechanisms provided by several relational database management systems.
Date:
February 1, 1992
Creator:
Markowitz, V. M.
Object Type:
Article
System:
The UNT Digital Library
Duct injection technology prototype development: Nozzle development Subtask 4. 1, Atomizer specifications for duct injection technology
Babcock Wilcox has conducted a program to identify atomizers appropriate for successful in-duct injection of humidification water and lime slurries. The purpose of this program was to identify and quantify atomizer spray and performance criteria that affect the operations and reliability of the in-duct SO{sub 2} removal process, and compare commercially available atomizers to these criteria.
Date:
February 1, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Reactor primary coolant system pipe rupture study. Progress report No. 38, October--December 1976. [BWR]
The pipe rupture study is designed to extend the understanding of failure-causing mechanisms and to provide improved capability for evaluating reactor piping systems to minimize the probability of failures. Following a detailed review to determine the effort most needed to improve nuclear system piping (Phase I), analytical and experimental efforts (Phase II) were started in 1965. The progress report summarizes the recent accomplishments of a broad program in (a) basic fatigue crack growth rate studies focused on LWR primary piping materials in a simulated BWR primary coolant environment, and (b) studies directed at quantifying weld sensitization in Type-304 stainless steel.
Date:
February 1, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Evaluation of closure alternatives for the Building 3001 Storage Canal at Oak Ridge National Laboratory, Oak Ridge, Tennessee
The Bldg. 3001 Storage Canal at ORNL is leaking approximately 400 gal of water per day. This report presents the Bechtel National Inc. (BNI) Team's evaluation of plans and presents recommendations for interim closure alternatives to stop the release of radionuclides and potential release of heavy metals into the environment. This is a conceptual evaluation and does not include detailed engineering of physical mitigation methods. The alternatives address only interim closure measures and not final decommissioning of the canal.
Date:
February 1, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Defects in metal crystals. Progress report, May 1, 1975--April 30, 1976. [W--Re; Pt--Au; Mo--Ti]
Emphasis was on use of different irradiating species (300-700 eV Xe/sup +/ ions, 20-30 keV W/sup +/ ions, 20-30 keV Mo/sup +/ ions, and fast neutrons) to introduce both vacancies and interstitials in Mo, W, Au, Pt--(Au), W--(Re), Mo(Ti), Ni/sub 4/Mo, and low-swelling and commercial 316 stainless steels. The following are reported: (A) an in-situ field-ion microscope study of ion-irradiated tungsten and tungsten alloys (W-Re) (recovery in Stages I and II); (B) a review of Stages I to IV of irradiated or quenched tungsten and tungsten alloys by field-ion microscopy; (C) a review of field-ion microscope studies of the defect structure of the primary state of damage of irradiated metals; (D) an in-situ field-ion microscope study of the recovery behavior of ion-irradiated molybdenum in Stages I and II; (E) a field-ion microscope study of the recovery behavior of Stage II in ion-irradiated platinum-0.10, 0.62 and 4.0 at. percent gold alloys; (F) a new technique for focused-collision sequence range measurements; (G) atom-probe field-ion microscopy (improvements, results on W alloys, Mo alloys (Mo, TZM, Mo--Ti), low-swelling stainless steel alloy); (H) range of a focused collision replacement sequence in ordered alloys; and (I) interaction of self-interstitial atoms with impurity gas solute atoms in …
Date:
February 1, 1976
Creator:
Seidman, D. N.
Object Type:
Report
System:
The UNT Digital Library
Radon entry into basements: Approach, experimental structures, and instrumentation of the small structures research project
We describe the experimental approach, structures, and instrumentation of a research project on radon generation and transport in soil and entry into basements. The overall approach is to construct small precisely-fabricated basements in areas of different geology and climate, to control the pressures and ventilation rates in the structures, and to monitor radon concentrations and other relevant parameters over a period of one year or more. Two nearly air-tight structures have been constructed at the first site. The floor of each structure contains adjustable-width slots that serve as the only significant pathway for advective entry of radon. A layer of gravel underlays the floor of one structure; otherwise they are identical. The structures are instrumented for continuous or periodic monitoring of soil, structural, and meteorological parameters that affect radon entry. The pressure difference that drives advective radon entry can be maintained constant or varied over time. Soil gas and radon entry rates and associated parameters, such as soil gas pressures and radon concentrations, have been monitored for a range of steady-state and time-varying pressure differences between the interior of the structure and the soil. Examples of the experimentally-measured pressure and permeability fields in the soil around a structure are presented …
Date:
February 1, 1992
Creator:
Fisk, W. J.; Modera, M. P.; Sextro, R. G.; Garbesi, K.; Wollenberg, H. A.; Narasimhan, T. N. et al.
Object Type:
Report
System:
The UNT Digital Library
Program for calculating x-ray powder diffraction interplanar (d) spacings with a Tektronix-31 desk top programmable calculator
A Tektronix-31 (Tektronix Inc. Beaverton, Oregon) desk top calculator program, which is used as a backup to the PDP-8/I computer program, is described. The program yields interplanar (d) spacings and (2theta) angle values from measurements made on an x-ray diffraction film of a powdered sample of a crystalline material. Use of the calculator provides accurate computations in a relatively rapid time interval when the PDP-8/I is not functioning because of downtime for repairs, maintenance, etc.
Date:
February 22, 1977
Creator:
Eckstein, R. R. & Ishida, Y. G.
Object Type:
Report
System:
The UNT Digital Library
Review of analysis methods for prestressed concrete reactor vessels
Theoretical and practical aspects of analytical models and numerical procedures for detailed analysis of prestressed concrete reactor vessels are reviewed. Constitutive models and numerical algorithms for time-dependent and nonlinear response of concrete and various methods for modeling crack propagation are discussed. Published comparisons between experimental and theoretical results are used to assess the accuracy of these analytical methods.
Date:
February 1, 1977
Creator:
Dodge, W. G.; Bazant, Z. P. & Gallagher, R. H.
Object Type:
Report
System:
The UNT Digital Library
Superconducting magnet development capability of the LLNL (Lawrence Livermore National Laboratory) High Field Test Facility
This paper discusses the following topics: High-Field Test Facility Equipment at LLNL; FENIX Magnet Facility; High-Field Test Facility (HFTF) 2-m Solenoid; Cryogenic Mechanical Test Facility; Electro-Mechanical Conductor Test Apparatus; Electro-Mechanical Wire Test Apparatus; FENIX/HFTF Data System and Network Topology; Helium Gas Management System (HGMS); Airco Helium Liquefier/Refrigerator; CTI 2800 Helium Liquefier; and MFTF-B/ITER Magnet Test Facility.
Date:
February 1, 1990
Creator:
Miller, J. R.; Shen, S. & Summers, L. T.
Object Type:
Report
System:
The UNT Digital Library