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616 Matching Results
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CORCON-MOD1 preliminary evaluation and application to safety analysis of a large LMFBR plant
The CORCON-MOD1 core material-concrete interaction code, developed at the Sandia Laboratories for LWR safety analysis, was adapted for analyzing a postulated LMFBR core melt accident.
Date:
June 30, 1981
Creator:
Chen, K.H. & Ray, K.S.
Object Type:
Report
System:
The UNT Digital Library
Nuclear criticality information system
The nuclear criticality safety program at LLNL began in the 1950's with a critical measurements program which produced benchmark data until the late 1960's. This same time period saw the rapid development of computer technology useful for both computer modeling of fissile systems and for computer-aided management and display of the computational benchmark data. Database management grew in importance as the amount of information increased and as experimental programs were terminated. Within the criticality safety program at LLNL we began at that time to develop a computer library of benchmark data for validation of computer codes and cross sections. As part of this effort, we prepared a computer-based bibliography of criticality measurements on relatively simple systems. However, it is only now that some of these computer-based resources can be made available to the nuclear criticality safety community at large. This technology transfer is being accomplished by the DOE Technology Information System (TIS), a dedicated, advanced information system. The NCIS database is described.
Date:
November 30, 1981
Creator:
Koponen, B. L. & Hampel, V. E.
Object Type:
Article
System:
The UNT Digital Library
Bates solar industrial process steam application environmental impact assessment
It is planned to install 34,440 square feet of linear parabolic trough solar collectors at a new corrugator plant for making corrugated boxes. The system is to operate in parallel with a fossil fuel boiler. An assessment is presented of the impacts of the solar energy system on the existing environment and to determine whether or not a more detailed environmental impact statement is needed. The environmental assessment is based on actual operational data obtained on the collector, fluid, and heat transport system. A description of the design of the solar energy system and its application is given. Also included is a discussion of the location of the new plant in Fort Worth, Texas, and of the surrounding environment. Environmental impacts are discussed in detail, and alternatives to the solar industrial process steam retrofit application are offered. It is concluded that the overall benefits from the solar industrial process heat system outweigh any negative environmental factors. Benefits include reduced fossil fuel demand, with attending reductions in air pollutants. The selection of a stable heat transfer fluid with low toxicity and biodegradable qualities minimizes environmental damage due to fluid spills, personal exposure, and degradation byproducts. The collector is found to be …
Date:
June 30, 1981
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Coal as an option for power generation in US territories of the Pacific
A survey of general considerations relating to the use of coal in US territories and trust territories of the Pacific suggests that coal is a viable option for power generation. Future coal supplies, principally from Australia and the west coast of America, promise to be more than adequate, but large bulk carriers will probably not be able to land coal directly because of inadequate port facilities. Hence, smaller than Panamax-class vessels (60,000 dwt) or some arrangement utilizing self-loading barges or lighters would have to be used. Except for Guam, with peak power requirements on the order of 175 MW/sub e/, most territories have current, albeit inadequate, installations of 1 to 25 MW/sub e/ Turnkey, conventional-coal-fired, electrical-power generating systems are available in that size range. US environmental laws are now applicable to Guam and American Samoa; the trust territories are exempt. However, the small power requirements of many small islands will qualify for exemption from the New Source Performance Standards called for in the Clean Air Act. The principal problems with coal use in the territories, apart from the shallow draft of most harbors, are the limited amount of land available and the high capital costs associated with conversion. Ocean dumping …
Date:
November 30, 1981
Creator:
Borg, I. Y.
Object Type:
Report
System:
The UNT Digital Library
Study of the competitive viability of minority fuel oil marketers. Final report
Previous studies on the competitive viability of the fuel oil heating market had addressed some of the unique problems facing minority fuel oil marketers (MFMs) within the total market sector (TMS). This study focused on identifying and developing quantitative information on MFMs in the TMS. The specific objective was to determine whether the business problems experienced by MFMs were directly related to their minority status or were characterstic of any firm in the TMS operating under comparable conditions. As an overall conclusion, thorough investigation of the MFMs considered to constitute the universe of minoriy firms within the TMS did not reveal any evidence of overt discrimination affecting the competitive viability of MFMs. Upon analysis, the problems reported by MFMs could not be reasonably ascribed to discrimination on the basis of their minority business status. The study, however, did point up problems unique to MFMs as the result of typical operational and financial characteristics. For example, MFMs, compared to the TMS norm, have not been in the market as long and are smaller in terms of total assets, number of employees, number of trucks, number of accounts and annual volume of oil delivered. Their primary customers are low-income families in urban …
Date:
September 30, 1981
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Comparative analysis of LMFBR licensing in the United States and other countries - notably France. Executive summary
The safety-related design aspects and licensing experiences of LMFBR projects in other democratic countries have been studied and contrasted to those in the United States in order to understand the importance of different approaches to safety, and also to understand better the system of the United States. The regulatory systems and LMFBR programs of France and the United States are contrasted in detail, and that of West Germany is also studied. The programs of Japan and the United Kingdom receive considerably less attention, and that of the Soviet Union is ignored.
Date:
September 30, 1981
Creator:
Golay, M.W. & Castillo, M.
Object Type:
Report
System:
The UNT Digital Library
Biological and clinical dosimetry. Progress report, October 1, 1980-September 30, 1981
A second measurement of the event size distribution for 20 MeV neutrons was carried out at Ohio University to determine the reproducability of results. Again a significant difference between measurement and theoretical calculations by Caswell and Coyne was found. The measured fraction of events due to alpha particles was significantly lower than that predicted by the calculation of Casell and Coyne. Furthermore, the discrepancies with the theoretical calculations made by Caswell and Coyne were confirmed by measurements made with a differently designed T-E proportional counter. A non-isolated-sensor solid polystyrene calorimeter was constructed and tested during the past year. It has the advantages of, (1) simple construction, (2) simple operation, without vacuum or feedback for temperature control, (3) the capability of obtaining simultaneous measurements at different depths and azimuthal angle, and (4) the possibility of obtaining measurements with the calorimeter directed in any orientation.
Date:
September 30, 1981
Creator:
Laughlin, J. S. & Zeitz, L.
Object Type:
Report
System:
The UNT Digital Library
Improved 50 ps response x-ray detector with optical applications
We have improved the impulse response characteristics of the LLNL 50 ps detector significantly. The detector has also been improved mechanically to permit much greater ease of assembly and repair. We are investigating modified versions of this design for optical applications. The detector was developed to complement the recording capability of our Thomson-CSF 4 GHz oscilloscopes in laser driven ICF fusion experiments research.
Date:
September 30, 1981
Creator:
Campbell, D.; Tirsell, G. & Laird, W.
Object Type:
Article
System:
The UNT Digital Library
Characterization of the dynamic roadway-powered electric-vehicle system
The measurements, data reduction, and analysis contained herein are for the most part preliminary. The instrumentation system for dynamic measurements was not completed and so the measurements taken were in the static mode and a limited amount of instruments was used. Most of these preliminary measurements were made to characterize the losses in the roadway and the pickup of the dynamic RPEV system. By analysis of power, voltage, current and impedance-bridge measurements (at 100 Hz and 1000 Hz), the equivalent series resistance (ESR) and equivalent parallel resistance (EPR) of the roadway and pickup inductances and capacitances were derived. Separation of the inductive and capacitive losses was difficult because of the large ratio of stored energy to power loss, that is, the Q of each of these system elements, and the separation was accomplished by modeling the system losses and making a least-squares fit to the model with the test data. The bridge data was used primarily for capacitance and inductance values and the ESR or EPR data were not analyzed.
Date:
October 30, 1981
Creator:
Salisbury, J.D.; Mullenhoff, D. & Walter, C.E.
Object Type:
Report
System:
The UNT Digital Library
TMI Unit-2 Technical Information and Examination Program Update
Information is presented concerning a submerged demineralizer system for contaminated water; multilevel sampling; inspection of solar crane; entry on containment building; and shipment of EPICOR 2 resin canister.
Date:
November 30, 1981
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Medium-energy nuclear physics research. Final technical progress report, May 1, 1971-November 30, 1981
Final results are summarized for this program with the primary emphasis on measurement of ten independent parameters for proton-proton elastic scattering at 800 MeV and four independent such parameters at 650 MeV. Inelastic proton-proton reactions have also been measured at 800 MeV. Proton-deuteron elastic scattering cross sections and polarization analyzing powers have been obtained at 800 MeV. Proton-nucleus total and total reaction cross sections were measured at 700 MeV for a number of nuclei. Major instrumentation was designed and constructed to carry out this program.
Date:
November 30, 1981
Creator:
Willard, H.B.
Object Type:
Report
System:
The UNT Digital Library
Flux of energy and essential elements through the continental shelf ecosystem. Progress report
There are three distinct but not mutually exclusive areas of research in this contract, studies of intrusions of the west wall of the Gulf Stream onto the outer continental shelf, studies of the flux of materials across nearshore density fronts, and advances in understanding of the planktonic food web of the continental shelf. Studies of frontal events on the outer and inner continental shelf involve distinctive physical and chemical regimes and have proven to require distinctive biological approaches. The studies of the food web run through our work on both of the frontal regimes, but certain aspects have become subjects in their own right. We have developed a simulation model of the flux of energy through the continental shelf food web which we believe to be more realistic than previous ones of its type. We have examined several of the many roles of dissolved organic compounds in sea water which originate either from release by phytoplankton, digestive processes or metabolites of zooplankton, or extracellular digestion of microorganisms. Methods have been developed under this contract to measure both the chelating capacity of naturally occurring organic materials and the copper concentration in the water. It has been possible to characterize the effects, …
Date:
November 30, 1981
Creator:
Pomeroy, L.R.
Object Type:
Report
System:
The UNT Digital Library
Underground home A/C system. Final report
The purpose of the project was to transfer the heat of house air into the earth through an underground piping system, return the cooler to the house and disperse it throughout the house. The principle of the idea has been achieved, but not to the extent desired. It was originally hoped that the system would allow temperatures in the house to reach a maximum of 80/sup 0/ even during days where outside temperatures reached high 90/sup 0/. So far, a differential of 6/sup 0/ to 8/sup 0/ has been achieved.
Date:
June 30, 1981
Creator:
Outland, B.W.
Object Type:
Report
System:
The UNT Digital Library
Carrier sense data highway system. [Patent for a two-way Data Transmission System]
A data transmission system is disclosed which includes a transmission medium which has a certain propagation delay time over its length. A number of data stations are successively coupled to the transmission medium for communicating with one another. Each of the data stations includes a transmitter for originating signals, each signal beginning with a carrier of a duration which is at least the propagation delay time of the transmission medium. Each data station also includes a receiver which receives other signals from other data stations and inhibits operation of the transmitter at the same data station when a carrier of another signal is received.
Date:
April 30, 1981
Creator:
Frankel, R.
Object Type:
Patent
System:
The UNT Digital Library
The Tulia Herald (Tulia, Tex.), Vol. 73, No. 31, Ed. 1 Thursday, July 30, 1981
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
July 30, 1981
Creator:
Tooley, Wendell
Object Type:
Newspaper
System:
The Portal to Texas History
The Tulia Herald (Tulia, Tex.), Vol. 73, No. 18, Ed. 1 Thursday, April 30, 1981
Weekly newspaper from Tulia, Texas that includes local, state and national news along with extensive advertising.
Date:
April 30, 1981
Creator:
Tooley, Wendell
Object Type:
Newspaper
System:
The Portal to Texas History
[Historic Marker Application: Schmidtke-Callahan House]
Application materials submitted to the Texas Historical Commission requesting a historic marker for the Schmidtke-Callahan House, in Bandera, Texas. The materials include the inscription text of the marker, narrative, and photographs.
Date:
September 30, 1981
Creator:
Texas Historical Commission
Object Type:
Text
System:
The Portal to Texas History
Negative tandem mirror
A tandem mirror configuration can be created by combining hot electron end cell plasmas with neutral beam pumping. A region of large negative potential formed in each end cell confines electrons in the central cell. The requirement of charge neutrality causes the central cell potential to become negative with respect to ground in order to confine ions as well as electrons. We discuss the method of producing and calculating the desired axial potential profile, and show the calculated axial potential profile and plasma parameters for a negative configuration of TMX-Upgrade.
Date:
November 30, 1981
Creator:
Poulsen, P.; Allen, S. L.; Casper, T. A.; Grubb, D. P.; Jong, R. A.; Nexsen, W. E. et al.
Object Type:
Article
System:
The UNT Digital Library
Multipolar corneal-shaping electrode
The disclosure relates to a multipolar probe using radiofrequency energy to reshape the cornea of an eye. The surface of the cornea is flushed continuously with a conductive coolant during operation.
Date:
April 30, 1981
Creator:
Doss, J.D.
Object Type:
Patent
System:
The UNT Digital Library
Effect of solid particles on the turbulent flow of a round gaseous jet. A mathematical and experimental study. Quarterly technical progress report, May 1, 1981-October 30, 1981
Progress in mathematical and experimental studies aimed at modeling and measuring flows rates for the two-phase gases with dispersed particles turbulent flows in jets is reported. Exact transport equations of mass and momentum for the two phases, the carrier fluid's kinetic energy of turbulence and its dissipation rate have been derived for incompressible two-phase flows. The modeling of the various turbulence correlations has been completed. The finite-difference formulation of the equations is in progress at present. An outline of the work completed so far is described in the next section. In the area of clear air jet measurements, attempts were made to obtain two-dimensional measurements of clear air jet using a two-color, bragg cell shifted laser velocimeter. A complete data set for the streamwise component of mean velocity and turbulence intensity and some data for tangential velocity components were recorded and are included. These data were obtained using a recently modified software package for two-component data acquisition. In the process of the experiment, some software/hardware problems evolved which resulted in incorrect values for shear stress data as well as the tangential velocity samples. The hardware and the software for the coincidence requirement of the two components were modified and the …
Date:
October 30, 1981
Creator:
Elghobashi, S.E.
Object Type:
Report
System:
The UNT Digital Library
Spheromak reactor-design study
A general overview of spheromak reactor characteristics, such as MHD stability, start up, and plasma geometry is presented. In addition, comparisons are made between spheromaks, tokamaks and field reversed mirrors. The computer code Sphero is also discussed. Sphero is a zero dimensional time independent transport code that uses particle confinement times and profile parameters as input since they are not known with certainty at the present time. More specifically, Sphero numerically solves a given set of transport equations whose solutions include such variables as fuel ion (deuterium and tritium) density, electron density, alpha particle density and ion, electron temperatures.
Date:
June 30, 1981
Creator:
Les, J.M.
Object Type:
Report
System:
The UNT Digital Library
Instrumentation system for long-pulse MFTF neutral beams
The instrumentation system for long pulse neutral beams for MFTFS consists of monitoring and protective circuitry. Global synchronization of high speed monitoring data across twenty-four neutral beams is achieved via an experiment wide fiber optic timing system. Fiber optics are also used as a means of isolating signals at elevated voltages. An excess current monitor, interrupt monitor, sparkdown detector, spot detector and gradient grid ratio detector form the primary protection for the neutral beam source. A unique hierarchical interlocking scheme allows other protective devices to be factored into the shutdown circuitry of the power supply so that the initiating cause of a shutdown can be isolated and even allows some non-critical devices to be safely ignored for a period of time.
Date:
September 30, 1981
Creator:
Risch, D.M.
Object Type:
Article
System:
The UNT Digital Library
Radiation effects in SYNROC-D
This paper describes SYNROC-D and the irradiation it will be subjected to over the first million years of storage. This will include about 8 x 10/sup 24/ alpha decays per m/sup 3/ and a total ionization dose of about 1 x 10/sup 11/ rads. Methods of simulating the radiation effects are discussed. Previous work by others is reviewed and compared on a dpa basis. /sup 238/Pu doping experiments to simulate internal alpha decay are described, and the progress is discussed. It is concluded that dose rate effects on swelling and metamictization of perovskite and zirconolite are small over a wide range of dose rate, and that swelling and metamictization in these minerals does not anneal significantly over geological time periods.
Date:
September 30, 1981
Creator:
Van Konynenburg, R.A. & Guinan, M.W.
Object Type:
Article
System:
The UNT Digital Library
Studies on the control of cell-wall extension. Three year progress report, September 1, 1978-June 30, 1981
Various parameters of plant cell growth are being assessed under conditions where growth is being enhanced or inhibited, in order to explain at the cellular level how growth is controlled. (ACR)
Date:
June 30, 1981
Creator:
Cleland, R. E.
Object Type:
Report
System:
The UNT Digital Library