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36,461 Matching Results
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Open cycle OTEC system with falling jet evaporator and condenser
A configuration for the open cycle (OC) Ocean Thermal Energy Conversion (OTEC) system is presented incorporating a countercurrent falling jet evaporator and a concurrent falling jet condenser. The parameters governing performance of the proposed configuration are discussed and the sizing of equipment for a 100-MWe net power output OC OTEC plant is performed, based on recent experimental falling jet heat and mass transfer results. The performance of an OC OTEC plant with falling jet evaporator-condenser is compared with the Westinghouse conceptual design that uses an open-channel evaporator and a surface condenser. Preliminary calculations indicate that falling jet heat and mass transfer, when applied in the proposed configuration, leads to a very simple and compact plant assembly resulting in substantial capital cost savings.
Date:
July 1, 1980
Creator:
Kogan, A.; Johnson, D. H.; Green, H. J. & Olson, D. A.
Object Type:
Article
System:
The UNT Digital Library
Rapid vibrational and rotational energy-transfer rates in heated carbon dioxide collisions by double-resonance laser spectroscopy
Rates for resonant vibrational and rotational energy transfer from the 001 state by CO/sub 2/ + CO/sub 2/ collisions have been measured. All data were obtained by double resonance spectroscopy with CO/sub 2/ lasers in a 2.5 meter absorption cell at 700/sup 0/K. Results for rotation transfer include pumped-level relaxation and the response of other 001 levels with ..delta..J up to 18. These data are compared to four relevant collision models via a 35-level rate equation analysis. Sequence-band (002 ..-->.. 101) and hot-band (011 ..-->.. 110) lasting have been used to observe resonant nu/sub 3/-transfer relaxation involving 001 + 001 reversible 002 + 000, 001 + 100 reversible 101 + 000, and 001 + 010 reversible 011 + 000. A multilevel rate analysis has been utilized to determine the rate coefficients for 001 going to the 002, the 101, and the 011 levels. Part of the hot-band data has been interpreted as due to 110 + 000 reversible 100 + 010, and the associated rate constant has been estimated. The results of the study are compared to the theory and to other experiments.
Date:
July 1, 1982
Creator:
Thomason, M.D.
Object Type:
Report
System:
The UNT Digital Library
Beam and viewing dump positioning inside TFTR for CTS alpha-particle diagnostics
A collective Thomson scattering (CTS) diagnostic system for localized measurement of energetic ions is being developed for TFTR. This system will use a 200KW, 56GHz gyrotron and a sensitive heterodyne receiver. In addition, a key element of this system will be beam and viewing dumps which are needed to minimize detection of stray gyrotron and ECE background radiation by the receiver system. It is the purpose of this study to determine the size and location of these dumps inside TFTR taking into account beam refraction and launch and receiver antenna optics scanning. The beam dump must cover all the area in the vacuum chamber where the beam is expected to impinge, and the viewing dump must cover all the areas within the direct line of sight of the receiver antenna. The beam launch system and the receiver antenna are to be placed nearly symmetrically above and below the midplane of the tokamak vacuum vessel, respectively. The beam dump is to be placed at the bottom inside of the vacuum vessel to absorb the gyrotron beam which will be launched from a top port. The viewing dump is expected to be placed symmetrically at the top inside of the vacuum vessel, …
Date:
July 15, 1991
Creator:
Rhee, D.Y.; Woskov, P.P. (Massachusetts Inst. of Tech., Cambridge, MA (United States). Plasma Fusion Center); Ellis, R. & Park, H. (Princeton Univ., NJ (United States). Plasma Physics Lab.)
Object Type:
Report
System:
The UNT Digital Library
Review of water resource potential for developing geothermal resource sites in the western United States
Water resources at 28 known geothermal resource areas (KGRAs) in the western United States are reviewed. Primary emphasis is placed upon examination of the waer resources, both surface and ground, that exist in the vicinity of the KGRAs located in the southwestern states of California, Arizona, Utah, Nevada, and New Mexico. In most of these regions water has been in short supply for many years and consequently a discussion of competing demands is included to provide an appropriate perspective on overall usage. A discussion of the water resources in the vicinity of KGRAs in the States of Montana, Idaho, Oregon, and Washington are also included.
Date:
July 1, 1980
Creator:
Sonnichsen, J.C. Jr.
Object Type:
Report
System:
The UNT Digital Library
A DESCRIPTION OF INTEGRAL PHYSICS DATA FOR FAST REACTOR DESIGN
Integral physics data for fast reactor design are discussed. The measurements needed include those of critical mass, shape factor, detector ratios, neutron spectra, material replacement experiments, reflector savings, neutron lifetime, Rossi- alpha , and similar quantities. Topics covered include Pu- and U/sup 233/-fueled systems, highly enriched U/sup 235/ systems in optimum geometry, uranium cores of various enrichments and dilutions, extreme geometry critical experiments, specific reactor systems, core mockup inhomogeneities, spectral studies and detector ratios, uranium equilibrium spectrum data, materialreplacement measurements, fast reactor dynamics, and suggested future experiments and experimental programs. (M.C.G.)
Date:
July 1, 1961
Creator:
Loewenstein, W.B. & Meneghetti, D.
Object Type:
Report
System:
The UNT Digital Library
Earth Sciences Division. Annual report 1979
This annual report contains articles describing the research programs conducted during the year. Major areas of interest include geothermal exploration technology, geothermal energy conversion technology, reservoir engineering, geothermal environmental research, basic geosciences studies, applied geosciences studies, nuclear waste isolation, and marine sciences. (ACR)
Date:
July 1, 1980
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Solar energy system economic evaluation: final report for SEMCO-Loxahatchee, Loxahatchee National Wildlife Refuge, Palm Beach County, Florida
The economic analysis of the solar energy system that was installed at Loxahatchee, Florida Operational Test Site (OTS) is developed for Loxahatchee and four other sites typical of a wide range of environmental and economic conditions in the continental United States. This analysis is accomplished based on the technical and economic models in the f-Chart design procedure with inputs based on the characteristics of the installed system and local conditions. The results are expressed in terms of the economic parameters of present worth of system costs over a projected twenty year life, life cycle savings, year of positive savings and year of payback for the optimized solar energy system at each of the analysis sites. The sensitivity of the economic evaluation to uncertainties in constituent system and economic variables is also investigated. The results demonstrate that the solar energy system is economically viable at all of the five sites for which the analysis was conducted.
Date:
July 1, 1980
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Processes of energy deposition by heavy particle impact. Technical report No. 2
Experimental studies of the Li/sup +/ + He interaction have been extended to smaller internuclear separations to clarify a discrepancy between experiment and theory in the elastic cross sections and to observe and measure cross sections for inelastic excitation. For R less than or equal to 0.5 a/sub 0/ the elastic scattering differential cross section is observed to droop far below that expected from a single-state interaction based on ab initio ground-state potentials. In this same region of R both one- and two-electron excitations of He are observed to be strongly excited, and cross sections were measured for each of them. The lowest inelastic channel is an electron-capture state, which is observed indirectly to be strongly populated also. A diabatic correlation diagram is constructed that exhibits the basic interactions responsible for the excitation.
Date:
July 6, 1971
Creator:
Lorents, D. C. & Conklin, G. M.
Object Type:
Report
System:
The UNT Digital Library
Introduction to nuclear test engineering
The basic information in this report is from a vu-graph presentation prepared to acquaint new or prospective employees with the Nuclear Test Engineering Division (NTED). Additional information has been added here to enhance a reader's understanding when reviewing the material after hearing the presentation, or in lieu of attending a presentation.
Date:
July 15, 1982
Creator:
O'Neal, W.C. & Paquette, D.L.
Object Type:
Report
System:
The UNT Digital Library
Kilowatt Isotope Power System: component test procedure for the ground demonstration system flow control valve. 77-KIP-57
Test procedures to be used to demonstrate the temperature control function, flow control function, and transient response of the Mechanical Flow-Temperature Control Valve in the Kilowatt Isotope Power System are described in detail. (LCL)
Date:
July 11, 1977
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Theory of drift, trapped-particle, and Alfven instabilities and anomalous plasma transport
Separate abstracts were prepared for each of the two included sections. (MOW)
Date:
July 1, 1980
Creator:
Chen, L.; Chance, M. S. & Cheng, C. Z.
Object Type:
Report
System:
The UNT Digital Library
Technical evaluation of the proposed design modifications and technical specification changes on grid voltage degradation for the H. B. Robinson Nuclear Generating Plant, Unit 2
This report documents the technical evaluation of the proposed design modifications and technical specification changes on grid voltage degradation for the H. B. Robinson Nuclear Generating Plant Unit 2. The review criteria are based on IEEE Std. 279-1971, IEEE Std. 308-1974, and General Design Criterion 17 of the Code of Federal Regulations, Title 10, Part 50, Appendix A requirements for determining the acceptability of the proposed system to protect the Class 1E equipment from degradation of grid voltages.
Date:
July 1, 1980
Creator:
Selan, J.C.
Object Type:
Report
System:
The UNT Digital Library
Near Term Hybrid Passenger Vehicle Development Program. Phase I, Final report. Appendix C: preliminary design data package. Volume I
The assumptions made, analysis methods used, and preliminary results of research to determine the design specifications for a hybrid electric-powered and internal combustion engine-powered vehicle that would optimize the fuel economy of passenger automobiles are described. Information is included on body and component design, selection of spark-ignition engine and Ni-Zn batteries, life-cycle costs and life-cycle fuel consumption. (LCL)
Date:
July 31, 1979
Creator:
Piccolo, R.
Object Type:
Report
System:
The UNT Digital Library
Calculation of particulate dispersion in a design-basis tornadic storm from the Atomics International Nuclear Material Development Facility, Santa Susana, California
A three-dimensional numerical model is used to calculate ground-level air concentration and deposition (due to precipitation scavenging) after a hypothetical tornado strike at the Atomics International Nuclear Material Development Facility at Santa Susana, California. Plutonium particles less than 20 ..mu..m in diameter are assumed to be lifted into the tornadic storm cell by the vortex. The rotational characteristics of the tornadic storm are embedded within the larger mesoscale flow of the storm system. The design-basis translational wind values are based on probabilities associated with existing records of tornado strikes in the vicinity of the plant site. Turbulence exchange coefficients are based on empirical values deduced from experimental data in severe storms and from theoretical assumptions obtained from the literature. The method of moments is used to incorporate subgrid-scale resolution of the concentration within a grid cell volume. This method is a quasi-Lagrangian scheme which minimizes numerical error associated with advection. In all case studies, the effects of updrafts and downdrafts, coupled with scavenging of the particulates by precipitation, account for most of the material being deposited within 50 km downwind of the plant site. Ground-level isopleths in the x-y plane show that most of the material is deposited behind and …
Date:
July 1, 1980
Creator:
Pepper, D.W.
Object Type:
Report
System:
The UNT Digital Library
Vertical bridgman and gradient freeze growth of III-V compound semiconductors
Major improvements in the structural and electrical perfection of single crystals of III-V compound semiconductors have been achieved by using new vertical Bridgman-type and vertical gradient freeze techniques. A general review of experimental set-ups used for growth of large diameter crystals of GaP, InP and GaAs is presented. Crystal properties and characteristic features are discussed to illustrate advantages and disadvantages of the vertical Bridgman-type growth techniques. 22 refs., 5 figs.
Date:
July 1, 1990
Creator:
Bourret, E.D.
Object Type:
Article
System:
The UNT Digital Library
Foreign and domestic discussions on natural geothermal power and potential use of Plowshare to stimulate these natural systems
None
Date:
July 6, 1971
Creator:
Burnham, J. B. & Stewart, D. H.
Object Type:
Report
System:
The UNT Digital Library
Terrestrial photovoltaic power systems with sunlight concentration. Progress report, January 1, 1975--July 31, 1975
None
Date:
July 31, 1975
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Sampling and analysis of trace-organic constituents in ambient and workplace air at coal-conversion facilities
A review of the recent literature reveals that current sampling procedures involve the use of glass fiber filters for particulate-sorbed organics and sorbent resins such as Tenax GC and XAD-2 for vapor-phase organics. Ultra trace-organic analysis of air pollutants or particulates may require the collection of a large (1000 to 3000 m/sup 3/) sample by a high volume air sampler. Personal air sampling requires a smaller (approx. = 0.5 m/sup 3/) and a portable collection apparatus. Trapped organic chemicals are recovered by solvent extraction or thermal desorption of the collector. Recovered organics are separated by using liquid chromatography or gas chromatography and are identified by ultraviolet or fluorescence spectroscopy, gas chromatography, or mass spectrometry. For quantification, standards are added to the air stream during sampling or to the filter or resin following sampling. Analysis of the requirement for air sampling in and around coal conversion plants, coupled with the findings of the literature review, indicates that a combined particulate-filter and solvent-extractable-resin sampling unit should be used to collect both particulate-sorbed organics and vapor-phase organics from workplace or ambient plant air. Such a sampler was developed for stationary, moderate-to-high-volume air sampling. Descriptions of the sampler are provided together with sampling efficiency …
Date:
July 1, 1980
Creator:
Flotard, R D
Object Type:
Report
System:
The UNT Digital Library
/sup 56/Ni and the light curve of Type I supernova
The explanation of SN Type I by radioactive decay of /sup 56/Ni requires a relatively small value of the transparency function M/sub ej//v/sub 9//sup 2/ = 0.22 in units of M/sub solar/'s and 10/sup 9/ cm s/sup -1/ to explain the light curve. A minimum mass of /sup 56/Ni is required to explain the peak and near peak luminosity. Subsequent radioactive decay energy must escape in some other form than optical light in order to explain the rapid early and late time decay. Early ultraviolet and infrared radiation are excluded as sinks of energy by observations. PdV work is excluded by theory. The energy loss due to the escape of gamma rays and ..beta../sup +/'s with the above value of M/sub ej//v/sub 9//sup 2/ gives good agreement with the light curve after maximum, provided essentially all the trapped energy is converted to optical light. The peak of SN 1972e is explained with the above transparency value M/sub ej//v/sub 9//sup 2/ = 0.22 and mass of /sup 56/Ni of 0.25 M/sub solar/ or 0.4 M/sub solar/, and a distance of 3.2 Mpc or 4 Mpc, respectively. These values depend critically upon the prediscovery report of Austin (1972), and the assumption again …
Date:
July 24, 1980
Creator:
Colgate, S.A. & Petschek, A.G.
Object Type:
Article
System:
The UNT Digital Library
CURRENT STATUS OF THE AC IONIZATION CHAMBER
ABS>The design concept of an a-c ionization chamber and its supporting electronics is described. Several designs are possible and the sensors can be tailored to specific requirements when necessary. Mode of operation, signal voltage development, and switching frequency are discussed. High-sensitivity operation is described. Requirements for high-temperature, power-level operation are outlined. (M.C.G.)
Date:
July 1, 1961
Creator:
Rusch, G.K.
Object Type:
Report
System:
The UNT Digital Library
Po-210 as long-term integrating radon indicator in the indoor environment
The general objective is to improve the knowledge about the transferring processes leading from airborne radon/radon daughters to embedded Po-210 in hard surfaces in the indoor environment. The specific goal of the research is to identify situations in which the surface activity of Po-210 can be used as a long-term indicator of lung cancer risk from past or future radon exposures.
Date:
July 1, 1990
Creator:
Samuelsson, C.
Object Type:
Report
System:
The UNT Digital Library
REMOTE DISSOLUTION AND ANALYTICAL PROGRAM FOR IRRADIATED THORIUM
A remote dissolution and analytical program for irradiated thorium is given. The aluminum jacket on the slug was dissolved with 6M nitric acid and 0.005M mercuric nitrate. After a water wash, the thorium dissolution was accomplished with concentrated nitric acid made 0.04M in hydrofluoric acid. Weighing, dissolving, and sampling were done remotely in the multicurie cell at the Idaho Chemical Processing Plant. Handling techniques for weighing and dissolving the slugs are described. Transferring and sampling apparatus as well as sampling techniques for the dissolved material are discussed. Analytical data obtained are tabulated. Abstracts of analytical methods for uranium concentration and isotope ratio, aluminum, thorium, cesium, and cerium are given. (auth)
Date:
July 14, 1961
Creator:
Huff, G. A.; Doggett, I. L.; Fletcher, R. D. & Jacobson, M. E.
Object Type:
Report
System:
The UNT Digital Library
Summary of the carbon dioxide effects research and assessment program
A brief management-oriented summary is presented of the research program. Goals, strategies, selected facts and predictions are presented. (ACR)
Date:
July 1, 1980
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Renewable Resources: a national catalog of model projects. Volume 4. Western Solar Utilization Network Region
This compilation of diverse conservation and renewable energy projects across the United States was prepared through the enthusiastic participation of solar and alternate energy groups from every state and region. Compiled and edited by the Center for Renewable Resources, these projects reflect many levels of innovation and technical expertise. In many cases, a critique analysis is presented of how projects performed and of the institutional conditions associated with their success or failure. Some 2000 projects are included in this compilation; most have worked, some have not. Information about all is presented to aid learning from these experiences. The four volumes in this set are arranged in state sections by geographic region, coinciding with the four Regional Solar Energy Centers. The table of contents is organized by project category so that maximum cross-referencing may be obtained. This volume includes information on the Western Solar Utilization Network Region. (WHK)
Date:
July 1, 1980
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library