Open Cycle Lithium Chloride Cooling System. Final Report, March 1, 1982-May 28, 1983 (open access)

Open Cycle Lithium Chloride Cooling System. Final Report, March 1, 1982-May 28, 1983

A lithium chloride open cycle absorption chiller has been designed, built and tested. Solution reconcentration takes place in a small counter-current packed column supplied with solar heated air. Removal of non-condensable gases that enter the chiller dissolved in the strong solution and the make-up refrigerant streams is accomplished by a liquid-jet ejector and a small vacuum pump. Cooling capacities approaching 1.4 tons and COP levels of 0.58 have been achieved at non-optimum operating conditions. Test results from preliminary system operation suggest that mass transfer processes in both the packed column reconcentrator and the absorber are controlled by concentration gradients in the lithium chloride solution. Liquid phase controlled mass transfer dictates an operating strategy different from the previously assumed gas phase controlled process to obtain maximum rates of evaporation in the packed column. Determination of optimal operating conditions leading to decreased electrical power consumption and improved cooling capacity and coefficient of performance will require further analysis and testing.
Date: May 1, 1983
Creator: Lenz, T. G.; Loef, G. O.G.; Iyer, R. & Wenger, J.
Object Type: Report
System: The UNT Digital Library
Geopressured geothermal bibliography. Volume II (geopressure thesaurus). Second Edition (open access)

Geopressured geothermal bibliography. Volume II (geopressure thesaurus). Second Edition

This thesaurus of terminology associated with the geopressured geothermal energy field has been developed as a part of the Geopressured Geothermal Information System data base. It is a compilation of terms displaying synomymous, hierarchical, and other relationships between terms. These terms, which are called descriptors, constitute the special language of the information retrieval system - the system vocabulary. The function of this thesaurus is to provide a standardized vocabulary for the information storage and retrieval system to facilitate both the indexing and subject-searching processes. In indexing, a thesaurus is used to translate the natural language of the document to be indexed into the standardized system vocabulary and to place the document at the appropriate level of generality or specificity in relation to the other documents in the data base. In subject retrieval, the thesaurus is used to match the natural language used in search requests with the system vocabulary and to find the most appropriate term to represent a concept.
Date: May 1, 1983
Creator: Sepehrnoori, K.; Carter, F.; Schneider, R.; Street, S. & McGill, K.
Object Type: Report
System: The UNT Digital Library
Experimental evaluation of the steady state and dynamic performance characteristics of the interactive units of a coal gasification process. Quarterly report, 27 December 1982-3 April 1983 (open access)

Experimental evaluation of the steady state and dynamic performance characteristics of the interactive units of a coal gasification process. Quarterly report, 27 December 1982-3 April 1983

A Test Plan Report has been prepared which details all the tests proposed for the 1983 operational season. One of these tests evaluates the thermal recycle mode which would be employed in a commercial configuration. In this mode, the condensate stream en route to the resaturator is passed back to the first gas cooler. The gas to liquid heat exchanger heats the condensate prior to resaturation. The analytical system simulation model, developed under this program, has been used to assess the operation of this mode and to select baseline conditions for the proposed test. Analysis of the data and results from tests conducted during the 1982 season has continued. In specific application, particularly power generation, the need exists to accommodate unanticipated contingency conditions. The response of the gasifier to such an occurrence was tested in 1982. Validation of the component models for the gasifier and the acid gas removal system has continued. Several enhancements to the gasifier model in the devolatilization zone are being added to increase accuracy. Improvements in the representation of the CO/sub 2/ absorption rate in the acid gas removal system model are being incorporated. A simplified combined cycle system model, integrated control system, and operator interface …
Date: May 1, 1983
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Colorado: basic data for thermal springs and wells as recorded in GEOTHERM (open access)

Colorado: basic data for thermal springs and wells as recorded in GEOTHERM

GEOTHERM sample file contains 225 records for Colorado. Three computer-generated indexes are found in appendices A, B, and C of this report. The indexes give one line summaries of each GEOTHERM record describing the chemistry of geothermal springs and wells in the sample file for Colorado. Each index is sorted by different variables to assist the user in locating geothermal records describing specific sites. Appendix A is sorted by the county name and the name of the source. Also given are latitude, longitude (both use decimal minutes), township, range, section, GEOTHERM record identifier, and temperature (/sup 0/C). Appendix B is sorted by county, township, range, and section. Also given are name of source, GEOTHERM record identifier, and temperature (/sup 0/C). Appendix C is first sorted into one-degree blocks by latitude, and longitude, and then by name of source. Adjacent one-degree blocks which are published as a 1:250,000 map are combined under the appropriate map name. Also given are GEOTHERM record identifier, and temperature (/sup 0/C). A bibliography is given in Appendix D.
Date: May 1, 1983
Creator: Bliss, J. D.
Object Type: Report
System: The UNT Digital Library
Geopressured geothermal bibliography. Volume I. Citation extracts. Second edition (open access)

Geopressured geothermal bibliography. Volume I. Citation extracts. Second edition

This annoted bibliography contains 1131 citations. It represents reports, papers, and articles appearing over the past eighteen years covering topics from the scientific and technical aspects of geopressured geothermal reservoirs to the social, environmental, and legal considerations of exploiting those reservoirs for their energy resources. Six indexes include: author, conference title, descriptor, journal title, report number, and sponsor. (MHR)
Date: May 1, 1983
Creator: Sepehrnoori, K.; Carter, F.; Schneider, R.; Street, S. & McGill, K.
Object Type: Report
System: The UNT Digital Library
Detectors for high resolution dynamic pet (open access)

Detectors for high resolution dynamic pet

This report reviews the motivation for high spatial resolution in dynamic positron emission tomography of the head and the technical problems in realizing this objective. We present recent progress in using small silicon photodiodes to measure the energy deposited by 511 keV photons in small BGO crystals with an energy resolution of 9.4% full-width at half-maximum. In conjunction with a suitable phototube coupled to a group of crystals, the photodiode signal to noise ratio is sufficient for the identification of individual crystals both for conventional and time-of-flight positron tomography.
Date: May 1, 1983
Creator: Derenzo, S.E.; Budinger, T.F. & Huesman, R.H.
Object Type: Article
System: The UNT Digital Library
HTGR applications program advanced systems. Semiannual report, October 1, 1982-March 31, 1983 (open access)

HTGR applications program advanced systems. Semiannual report, October 1, 1982-March 31, 1983

Work Breakdown Structure (WBS 41) activities emphasize the advanced HTGR modular reactor system (MRS) for reformer (R) and steam cycle/-cogeneration (SC/C) applications. This report describes progress in system performance for a 250-MW(t) MRS-R and a 300-MW(t) MRS-SC/C plant; it details the groundrules and parameters for the FY-83 nuclear core design and examines and compares fuel cycle economics. This report gives results from a study on decay heat removal transients for the MRS-R and MRS-SC/C variants. It evaluates the bypass valve system and the number and location of helium circulators, and it describes the progress on circulator component design, a prestressed concrete vessel steel closure design, and plant licensing and safety. Under the Advanced Technology Transfer Task (WBS 15), this report includes a section on a pebble bed reactor (PBR) MRS core heatup thermal model analysis. This report also gives the results of a survey on candidate reformer tube materials from GA Technologies Inc. to identify acceptable substitute materials for Inconel 617 to alleviate possible cobalt activation and carburization problems.
Date: May 1, 1983
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Snubber qualification and test requirements (open access)

Snubber qualification and test requirements

The use of snubbers for safety related piping systems has increased significantly during the last decade. A corresponding increase in snubber requirements (criteria) has also occurred. A review of these criteria indicates inconsistencies and contradictions, and reflects how rapidly knowledge and experience has been gained and applied. This study reviews and summarizes existing criteria, illustrates inconsistencies and recommends research to resolve conflicts.
Date: May 2, 1983
Creator: Onesto, A.T. & Larson, D.A.
Object Type: Report
System: The UNT Digital Library
Technique for examining the fuel/cladding interface by TEM. [LMFBR] (open access)

Technique for examining the fuel/cladding interface by TEM. [LMFBR]

Fuel and fission-product interactions with the fuel-pin cladding is an area of concern and has been evaluated in the past principally by in-cell optical metallographic and electron-microprobe examinations. The applicability of three techniques for preparing specimens to reveal the microstructural details and local microchemistry of the fuel/cladding interface under conditions of high-resolution-scanning transmission-electron microscopy has been investigated. The specimen preparation techniques were designed to preserve the fuel/cladding interface and provide and maintain a specimen surface free from smearable alpha contamination. One of the techniques, Ni plating of a fuel cladding sample, preserved the entire cladding cross-section for examination. An Fe-oxide layer on the cladding inner surface was found in specimens prepared by this method. All three techniques of specimen preparation are described in some detail, along with their advantages and disadvantages.
Date: May 1, 1983
Creator: Yang, W. J. S.; Makenas, B. J. & Thomas, L. E.
Object Type: Report
System: The UNT Digital Library
Conceptual design summary for modifying Doublet III to a large dee-shaped configuration (open access)

Conceptual design summary for modifying Doublet III to a large dee-shaped configuration

The Doublet III tokamak is to be reconfigured by replacing its indented (doublet) vacuum vessel with a larger one of a dee-shaped cross section. This change will permit significantly larger elongated plasmas than is presently possible and will allow higher plasma current (up to 5 MA) and anticipated longer confinement time. Reactor relevant values of stable beta and plasma pressure are predicted. This modification, while resulting in a significant change in capability, utilizes most of the existing coils, structure, systems and facility.
Date: May 1, 1983
Creator: Davis, L. G.; Gallix, R.; Luxon, J. L.; Mahdavi, M. A.; Puhn, F. A.; Rock, P. J. et al.
Object Type: Article
System: The UNT Digital Library
NOVANET: communications network for a control system (open access)

NOVANET: communications network for a control system

NOVANET is a control system oriented fiber optic local area network that was designed to meet the unique and often conflicting requirements of the Nova laser control system which will begin operation in 1984. The computers and data acquisition devices that form the distributed control system for a large laser fusion research facility need reliable, high speed communications. Both control/status messages and experimental data must be handled. A subset of NOVANET is currently operating on the two beam Novette laser system.
Date: May 23, 1983
Creator: Hill, J.R.; Severyn, J.R. & VanArsdall, P.J.
Object Type: Article
System: The UNT Digital Library
Utah: basic data for thermal springs and wells as recorded in GEOTHERM (open access)

Utah: basic data for thermal springs and wells as recorded in GEOTHERM

This GEOTHERM sample file contains 643 records for Utah. Records may be present which are duplicates for the same analyses. A record may contain data on location, sample description, analysis type (water, condensate, or gas), collection condition, flow rates, and the chemical and physical properties of the fluid. Stable and radioactive isotopic data are occasionally available. Some records may contain only location and temperature. This compilation should contain all the chemical data for geothermal fluids in Utah available as of December, 1981. 7 refs. (ACR)
Date: May 1, 1983
Creator: Bliss, J. D.
Object Type: Report
System: The UNT Digital Library
Addendum to material selection guidelines for geothermal energy-utilization systems. Part I. Extension of the field experience data base. Part II. Proceedings of the geothermal engineering and materials (GEM) program conference (San Diego, CA, 6-8 October 1982) (open access)

Addendum to material selection guidelines for geothermal energy-utilization systems. Part I. Extension of the field experience data base. Part II. Proceedings of the geothermal engineering and materials (GEM) program conference (San Diego, CA, 6-8 October 1982)

The extension of the field experience data base includes the following: key corrosive species, updated field experiences, corrosion of secondary loop components or geothermal binary power plants, and suitability of conventional water-source heat pump evaporator materials for geothermal heat pump service. Twenty-four conference papers are included. Three were abstracted previously for EDB. Separate abstracts were prepared for twenty-one. (MHR)
Date: May 1, 1983
Creator: Smith, C. S. & Ellis, P. F., II
Object Type: Article
System: The UNT Digital Library
Ultra-relativistic heavy ions and cosmic rays (open access)

Ultra-relativistic heavy ions and cosmic rays

The collisions of ultra-relativistic heavy ions, E/sub /N/ greater than or equal to 1 TeV/nucleon are most interesting, since, at these energies, matter is produced at sufficiently high energy density that a quark-gluon plasma has a good chance to form. Very heavy ions are also most interesting since the matter forms in a larger volume than for light ions, and the matter is at a somewhat higher energy density. At very high energies with very heavy ions there is great flexibility in the experimental signals which might be studied, as well as the nature of the matter which is produced. The fragmentation region and central region provide different environments where a plasma might form. The former is baryon rich while the central region is high temperature with low baryon number density and is not accessible except at very high energies.
Date: May 1, 1983
Creator: McLerran, L.
Object Type: Article
System: The UNT Digital Library
NATURAL CONVECTIONIN SHALLOW ENCLOSURES WITH DIFFERENTIALLY HEATED END WALLS AND NONADIABATIC HORIZONTAL WALLS (open access)

NATURAL CONVECTIONIN SHALLOW ENCLOSURES WITH DIFFERENTIALLY HEATED END WALLS AND NONADIABATIC HORIZONTAL WALLS

Numerical studies of laminar natural convection at high Ra numbers in shallow enclosures are reported. In these studies the working fluid is allowed to interact with the horizontal walls. It is shown that even a small amount of heat loss from these walls can lead to a flow structure qualitatively different from the more commonly studied situation where the horizontal walls are adiabatic. This is particularly important in applications where the mass transfer and flow structure are of interest. The results highlight the difficulty in practice of both approximating the adiabatic horizontal wall condition, and interpreting experimental data.
Date: May 1, 1983
Creator: Gadgil, A. & Shiralkar, G.
Object Type: Article
System: The UNT Digital Library
Spec-Doc: A User's Guide to Spectrometer Software (open access)

Spec-Doc: A User's Guide to Spectrometer Software

SPEC is the name of the operating system designed to control the NMR spectrometers in lab. SPEC is actually one large program which handles many functions necessary to control each spectrometer. The program handles all I/O with peripheral devices such as the console ('terminal' or 'CRT'). The program carries out its operations by accepting commands which each invoke specific subroutines to perform their function. There are a total of 60 commands in SPEC, each carrying out a different function. Because so many commands make SPEC a very large program, not all of the program is core resident. Rather, each command calls in an overlay handler which loads into memory the appropriate overlay from the disk and begins execution of the command. Thus SPEC is an independent disk based operating system. The commands in SPEC are capable of operating the microprocessor based pulse programmer, starting and acquiring data from the spectrometer data acquisition system, storing data on disk and manipulating it mathematically, displaying and plotting data. All arithmetic operations within SPEC are performed on integers. Since the DATA GENERAL computers are 16 bit machines operating in two's complement mode, the integer range is +32767. Many of the mathematical operations of SPEC …
Date: May 1, 1983
Creator: Sinton, S.
Object Type: Report
System: The UNT Digital Library
Diffraction: What Do We Know; What Can We Learn (open access)

Diffraction: What Do We Know; What Can We Learn

High energy diffractive scattering is reviewed. We first summarize experimental results and information gleaned from geometric and optical models. We then discuss dynamics from the perspectives of hadron structure and Pomeron structure. Particular emphasis is placed on investigating hadron structure using a simple model of the Pomeron. 58 references.
Date: May 1, 1983
Creator: Randa, J.
Object Type: Article
System: The UNT Digital Library
Radiation-effects limits on copper in superconducting magnets (open access)

Radiation-effects limits on copper in superconducting magnets

The determination of the response of copper stabilizers to neutron irradiation in fusion-reactor superconducting magnets requires information in four areas: (1) neutron flux and spectrum determination, (2) resistivity changes at zero field, (3) resistivity changes at field, and (4) the cyclic irradiation and annealing. Applications of our current understanding of the limits of copper stabilizers in fusion-reactor designs are explored in two examples. Recommendations for future additions to the data base are discussed.
Date: May 25, 1983
Creator: Guinan, M.W.
Object Type: Article
System: The UNT Digital Library
Consistent linearization method for finite-element analysis of viscoelastic materials (open access)

Consistent linearization method for finite-element analysis of viscoelastic materials

A method of formulating material models for viscoelastic analysis using the finite-element method is presented. The method, named consistent linearization, includes the influence of creep in the material stiffness in a theoretically ideal manner. This method has been applied to the linear viscoelastic analysis of graphite subject to irradiation. Previously, using the initial strain method, short time steps had been required to avoid a numerical instability associated with the rapid transient creep. Using the consistent linearization method a factor of 15 reduction in computer time was achieved for the same accuracy.
Date: May 1, 1983
Creator: Smith, P.D. & Pelessone, D.
Object Type: Article
System: The UNT Digital Library
Applicability of hydroxylamine nitrate reductant in pulse-column contactors (open access)

Applicability of hydroxylamine nitrate reductant in pulse-column contactors

Uranium and plutonium separations were made from simulated breeder reactor spent fuel dissolver solution with laboratory-sized pulse column contactors. Hydroxylamine nitrate (HAN) was used for reduction of plutonium (1V). An integrated extraction-partition system, simulating a breeder fuel reprocessing flowsheet, carried out a partial partition of uranium and plutonium in the second contactor. Tests have shown that acceptable coprocessing can be ontained using HAN as a plutonium reductant. Pulse column performance was stable even though gaseous HAN oxidation products were present in the column. Gas evolution rates up to 0.27 cfm/ft/sup 2/ of column cross section were tested and found acceptable.
Date: May 1, 1983
Creator: Reif, D.J.
Object Type: Report
System: The UNT Digital Library
Engineered waste-package-system design specification (open access)

Engineered waste-package-system design specification

This report documents the waste package performance requirements and geologic and waste form data bases used in developing the conceptual designs for waste packages for salt, tuff, and basalt geologies. The data base reflects the latest geotechnical information on the geologic media of interest. The parameters or characteristics specified primarily cover spent fuel, defense high-level waste, and commercial high-level waste forms. The specification documents the direction taken during the conceptual design activity. A separate design specification will be developed prior to the start of the preliminary design activity.
Date: May 1, 1983
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Implications of polarized DT plasmas for toroidal fusion reactors (open access)

Implications of polarized DT plasmas for toroidal fusion reactors

Spin polarization of the deuterons and tritons in a reacting plasma can result in an increase in the fusion reactivity and variation of the angular distribution of emission of the fusion neutrons. The increased fusion reactivity relaxes the confinement-temperature conditions for breakeven and ignition. We have determined the effect of varying the angular distribution of the fusion neutrons on the spatial distribution of fusion neturon current and flux at the first wall, on the global tritium breeding ratio, and on the first-wall radiation damage in low-aspect-ratio toroidal geometry.
Date: May 1, 1983
Creator: Micklich, B. J. & Jassby, D. L.
Object Type: Report
System: The UNT Digital Library
Self-pumping impurity control by in-situ metal deposition (open access)

Self-pumping impurity control by in-situ metal deposition

A system for in-situ removal of helium by trapping in freshly deposited metal surface layers of a limiter or divertor has been studied. The system would trap helium on a limiter front surface, or a divertor plate, at low plasma edge temperatures, or in a limiter slot region, at high edge temperatures. Fresh material, introduced to the plasma and/or scrape-off zone, would be added at a rate of about five times the alpha production rate. The material would be reprocessed periodically, e.g., once year. Possible materials are nickel, vanadium, niobium, and tantalum. Advantages of a self-pumping system are the absence of vacuum ducts and pumps, and the minimization of tritium processing and inventory.
Date: May 1, 1983
Creator: Brooks, J. N. & Mattas, R. F.
Object Type: Report
System: The UNT Digital Library
Solar thermal financing guidebook (open access)

Solar thermal financing guidebook

This guidebook contains information on alternative financing methods that could be used to develop solar thermal systems. The financing arrangements discussed include several lease alternatives, joint venture financing, R and D partnerships, industrial revenue bonds, and ordinary sales. In many situations, alternative financing arrangements can significantly enhance the economic attractiveness of solar thermal investments by providing a means to efficiently allocate elements of risk, return on investment, required capital investment, and tax benefits. A net present value approach is an appropriate method that can be used to investigate the economic attractiveness of alternative financing methods. Although other methods are applicable, the net present value approach has advantages of accounting for the time value of money, yielding a single valued solution to the financial analysis, focusing attention on the opportunity cost of capital, and being a commonly understood concept that is relatively simple to apply. A personal computer model for quickly assessing the present value of investments in solar thermal plants with alternative financing methods is presented in this guidebook. General types of financing arrangements that may be desirable for an individual can be chosen based on an assessment of his goals in investing in solar thermal systems and knowledge of …
Date: May 1, 1983
Creator: Williams, T. A.; Cole, R. J.; Brown, D. R.; Dirks, J. A.; Edelhertz, H.; Holmlund, I. et al.
Object Type: Report
System: The UNT Digital Library