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Achieving higher count rates with EDX
An automated energy-dispersive x-ray spectrometer (EDX) was developed for the close-coupled analysis of mixed U, Pu oxide fuel pellets. (Close-coupled means the analytical glove box is closely adjacent to the production line.) The L ..cap alpha.. fluorescences of U and Pu were chosen. The advantages and disadvantages of the system are given. (DLC)
Date:
January 1, 1980
Creator:
Lambert, M. C.
Object Type:
Article
System:
The UNT Digital Library
Acid-base model for thy--mochemical water splitting. Results of experimental tests on manganese-based thermochemical cycles
An acid-base model for thermochemical water splitting cycles is described, together with the results of its application to cycles based upon reactions of manganese oxides. Experiments confirmed that at least 12 acids-HCl, H/sub 2/SO/sub 4/, H/sub 3/PO/sub 4/, MoO/sub 3/, NaPO/sub 3/, Na/sub 4/P/sub 2/O/sub 7/, SiO/sub 2/, Cr/sub 2/O/sub 3/, TiO/sub 2/, Al/sub 2/O/sub 3/, SnO/sub 2/, and Fe/sub 2/Onumber-drive the thermal decomposition of NaMnO/sub 2/ at temperatures below 1400/sup 0/K. Only rather strong bases-NaOH, LiOH, BaO, Li/sub 2/CO/sub 3/, Na/sub 2/CO/sub 3/-can drive the steam oxidation of Mn(II) below 1300/sup 0/K. In accord with the model, the acids HCl, H/sub 2/SO/sub 4/, H/sub 3/PO/sub 4/, and MoO/sub 3/ are too strong to be used in Mn(III)/(II) cycles, because their Na, Li, and Ba salts are too stable. Cycles were demonstrated with the other 8 acids and either NaOH or Na/sub 2/CO/sub 3/. Because such cycles evolve O/sub 2(g)/ in the presence of air, solar furnaces are appropriate sources of thermal energy for them.
Date:
January 1, 1980
Creator:
Robinson, Paul R. & Kilyk, John, Jr.
Object Type:
Article
System:
The UNT Digital Library
Acoustic emission. Flaw relationship for in-service monitoring of nuclear pressure vessels
Acoustic emission (AE) testing has the potential of being a valuable NDI method with capability for continuous monitoring, high sensitivity, and remote flaw location. Tests of the method were carried out on ASTM A533 Grade B, Class 1 steel. Crack growth AE signals could be recognized. An AE/fracture mechanics relation was developed for flaw interpretation. Two intermediate vessel tests at ORNL under the HSST program were analyzed. A simulated reactor vessel test and installation of an AE sensing system on a reactor are planned. (DLC)
Date:
January 1, 1980
Creator:
Hutton, P.H. & Kurtz, R.J.
Object Type:
Article
System:
The UNT Digital Library
Acoustic Loading Effects on Oscillating Rod Bundles
An analytical study of the interaction between an infinite acoustic medium and a cluster of circular rods is described. The acoustic field due to oscillating rods and the acoustic loading on the rods are first solved in a closed form. The acoustic loading is then used as a forcing function for rod responses, and the acousto-elastic couplings are solved simultaneously. Numerical examples are presented for several cases to illustrate the effects of various system parameters on the acoustic reaction force coefficients. The effect of the acoustic loading on the coupled eigenfrequencies are discussed.
Date:
1980~
Creator:
Lin, W. H.
Object Type:
Article
System:
The UNT Digital Library
Across the street from hotel - buildings
Photograph of buildings across the street from the hotel the Zichner's stayed at in Prague in the Czech Republic.
Date:
1980
Creator:
Zichner, Mildred Schaeffer
Object Type:
Photograph
System:
The UNT Digital Library
Actinide cross section program at ORELA
The actinide cross section program at ORELA, the Oak Ridge Electron Linear Accelerator, is aimed at obtaining accurate neutron cross sections (primarily fission, capture, and total) for actinide nuclides which occur in fission reactors. Such cross sections, measured as a function of neutron energy over as wide a range of energies as feasible, comprise a data base that permits calculated predictions of the formation and removal of these nuclides in reactors. The present program is funded by the Division of Basic Energy Sciences of DOE, and has components in several divisions at ORNL. For intensively ..cap alpha..-active nuclides, many of the existing fission cross section data have been provided by underground explosions. New measurement techniques, developed at ORELA, now permit linac measurements on fissionable nuclides with alpha half-lives as short as 28 years. Capture and capture-plus-fission measurements utilize scintillation detectors (of capture ..gamma.. rays and fission neutrons) in which pulse shape discrimination plays an important role. Total cross sections can be measured at ORELA on samples of only a few milligrams. A simultaneous program of chemical and isotopic analyses of samples irradiated in EBR-II is in progress to provide benchmarks for the existing differential measurements. These analyses are being studied …
Date:
January 1, 1980
Creator:
Dabbs, J. W. T.
Object Type:
Article
System:
The UNT Digital Library
Actinide partitioning-transmutation program final report. VI. Short-term risk analysis of reprocessing, refabrication, and transportation: appendix
The Chemical Technology Division of the Oak Ridge National Laboratory has prepared a set of documents that evaluate a Partitioning-Transmutation (PT) fuel cycle relative to a Reference cycle employing conventional fuel-material recovery methods. The PT cycle uses enhanced recovery methods so that most of the long-lived actinides are recycled to nuclear power plants and transmuted to shorter-lived materials, thereby reducing the waste toxicity. This report compares the two fuel cycles on the basis of the short-term radiological and nonradiological risks they present to the public and to workers. The accidental radiological risk to the public is analyzed by estimating the probabilities of sets of accidents; the consequences are calculated using the CRAC code appropriately modified for the material composition. Routine radiological risks to the public are estimated from the calculated release amounts; the effects are calculated using the CRAC code. Radiological occupational risks are determined from prior experience, projected standards, and estimates of accident risk. Nonradiological risks are calculated from the number of personnel involved, historical experience, and epidemiological studies. The result of this analysis is that the short-term risk of PT is 2.9 times greater than that of the Reference cycle, primarily due to the larger amount of industry. …
Date:
January 1, 1980
Creator:
Fullwood, R.R. & Jackson, R.
Object Type:
Report
System:
The UNT Digital Library
Activated carbon adsorption from a high TOC wastewater
The ability of activated carbon to reduce total organic carbon in highly concentrated wastewaters from a coal gasification pilot plant was evaluated in laboratory batch and column tests. The wastewater initially contains over 5000 mg/l TOC, largely phenols and cresols, with numerous other organic species in much lower concentrations. The physical adsorption process is best explained by the Freundlich model, with the slope and intercept of the Freundlich isotherm comparable to data reported for treatment of refinery wastes. Carbon exhaustion rates and bed depth-service time curves are also comparable to refinery treatment data obtained from waters of lower TOC or COD. Laboratory-scale column tests reduced TOC from 5740 mg/l to 200 mg/l.
Date:
January 1, 1980
Creator:
Hird, K.B.; Kube, W.R. & Schobert, H.H.
Object Type:
Report
System:
The UNT Digital Library
Active And Passive Seismic Studies of Geothermal Resources in New Mexico and Investigations of Earthquake Hazards to Geothermal Development
Seismic data were collected in southwestern New Mexico to investigate the sources of the geothermal anomalies and to investigate the potential earthquake hazards of geothermal development. No major crustal structure anomalies have been located related to known geothermal resources, and no areas of continual seismicity have been identified, which is interpreted to indicate a lack of active, or recently active crustal intrusions in southwestern New Mexico. Without a magnetic heat source, the geothermal potential of the known anomalies is probably limited to intermediate and low temperature applications (<180/sup 0/C). The lack of continual seismicity indicates low seismic hazard in the area directly related to geothermal development, although the historic and geologically recent tectonic activity should be taken into consideration during any development in the area. A model of forced groundwater convection is presented to explain the geothermal anomalies in southwestern New Mexico, which is consistent with all available geological and geophysical data from the area.
Date:
January 1980
Creator:
Morgan, Paul & Daggett, Paul H.
Object Type:
Book
System:
The UNT Digital Library
Active feedback control for stabilization of vibration in rotating machinery (24. 034). Period covered: April 1-June 30, 1980
Some of the considerations involved in the use of feedback control as a means of reducing the unbalanced response of a rotor or of eliminating or alleviating rotor dynamic instability are discussed. A simple model of a mass on a flexible shaft is used to illustrate the application of feedback control concepts. A description is given of a system assembled at the University of Virginia which uses feedback control individually adjustable in the vertical and horizontal directions to support the shaft bearings.
Date:
January 1, 1980
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Active measurements of defect processes in shock compressed metals and other solids
Solid samples have been routinely recovered for examination after having been subjected to high pressure shock loading. Such investigations have revealed many unique and interesting defect features and are essential if a detailed understanding of shock deformation processes is to be achieved. Nevertheless, examination of samples hours or days after they are compressed for only a few microseconds in a loading whose rise time may be subnanosecond fails to address the relationship between the residual defect structure and that existing during the loading. Electrical probes, and to a lesser extent optical probes, have provided reasonably direct measurements of defect states and some limited information on the evolution of these states. For example, measurements of the electrical resistance of metals provide an indication of vacancy concentrations. Similarly, measurements of shock-induced electrical polarization in insulating solids have provided evidence that large numbers of point defects are generated and displaced by the stress and velocity gradients within the shock fronts. Optical measurements of shock-induced bleaching of color centers in NaCl have provided some evidence for kinetics of the formation of higher-order point defects. This paper reviews the status of active measurements which have provided information about shock-induced changes in the defect state of …
Date:
January 1, 1980
Creator:
Graham, R. A.
Object Type:
Article
System:
The UNT Digital Library
[An actor and actress posing together]
Portrait of an actor and actress posing together in their costumes. The man is seated in a chair and dressed in an army uniform. The woman beside him is wearing a frilly blouse and wearing a dark skirt. She is resting her hand on his shoulder as they pose.
Date:
[1980..1991]
Creator:
Williams, Byrd M. (Byrd Moore), IV, 1951-
Object Type:
Photograph
System:
The UNT Digital Library
[An actor wearing a military uniform and holding a prop gun]
Photograph of an actor wearing a military uniform and holding a prop rifle in his left hand.
Date:
[1980..1991]
Creator:
Williams, Byrd M. (Byrd Moore), IV, 1951-
Object Type:
Photograph
System:
The UNT Digital Library
ACTVE News, Volume 11, Number 1, January 1980
Newsletter issued by the Advisory Council for Technical-Vocational Education in Texas discussing news, events, and other relevant information related to technical and vocational education for adults in Texas.
Date:
January 1980
Creator:
Advisory Council for Technical-Vocational Education in Texas
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Acufenos V
Access:
Use of this item is restricted to the UNT Community
Recording of Alcides Lanza's Acufenos V, for trumpet, piano and electronic sounds. Written in 1980 for the trumpet player Robert Gibson, who did the premiere performance at Pollack Hall, Montreal, with the pianist with Alcides Lanza at the piano. The tape part of Acufenos V was made from sounds of recorded trumpet, with a diversity of mutes and styles of playing, and electronic imitations of the same sounds. Acufenos is a Spanish medical term meaning "tinnitus" (tinnitus: from the Latin ringing, French tinnitus or acuphene. It is the past participle of "tinnire", to ring: a sensation of noise (as a ringing or roaring) that is purely subjective. With the carapace of a porcupine type of animal. The tape part was realized at the electronic music studio, McGill University, Montreal, and finalized at the private studio of the composer (Shelan Studios).
Date:
1980
Creator:
Lanza, Alcides
Object Type:
Sound
System:
The UNT Digital Library
Adaptive optimal control: an algorithm for direct digital control
An algorithm for applying advanced control concepts in heating, ventilating, and air conditioning (HVAC) systems has been developed at the Los Alamos Scientific Laboratory (LASL). The algorithm uses optimal control and is adaptive in nature. Simulations for a solar heated and cooled building indicate that use of this algorithm can accomplish a substantial savings in auxiliary energy consumption. In this paper, the algorithm is described and its application is illustrated with a simple example. Simulation results for a more complex system are also presented. The hardware, including the digital computer, needed to implement this algorithm is briefly discussed.
Date:
January 1, 1980
Creator:
Farris, D. R. & McDonald, T. E.
Object Type:
Article
System:
The UNT Digital Library
Add-On Interest, The Rule of 78's, And Annual Percentage Rate
Report on mortgage interest rates and calculation methods including tables showing how the interests rates affect the principal balance.
Date:
1980~
Creator:
Friedman, Jack P.
Object Type:
Report
System:
The Portal to Texas History
Addicks Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24000
Date:
1980
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Additional solar/load ratio correlations for direct gain buildings
Solar/load ratio (SLR) correlations have been developed for two new reference direct gain designs. The new reference designs are identical to the originals except that the glazing air gap has been increased from 1/4 in. to 1/2 in. and a vector average of the local hourly windspeed was used in the thermal network calculations rather than an assumed average value of 15 m.p.h. Both of these modifications are realistic and enhance the predicted performance of direct gain buildings. A comprehensive set of mass sensitivity calculations has been performed in order to provide information needed to select an appropriate set of parameters for new lightweight direct gain designs for which additional SLR correlations will be developed. Representative results are reported.
Date:
January 1, 1980
Creator:
Wray, W.O.
Object Type:
Article
System:
The UNT Digital Library
Additions and corrections to the bibliography of geologic studies, Columbia Plateau (Columbia River Besalt) and adjacent Areas, in Idaho, 1980
This bibliography is an update to Idaho Bureau of Mines and Geology Open-File Report 78-6, Bibliography of Geological Studies, Columbia Plateau (Columbia River Basalt Group) and adjacent areas in Idaho (also known as Rockwell Hanford Operations' contractor report RHO-BWI-C-44). To keep the original document current, this additions and corrections report was prepared for the Basalt Waste Isolation Project of Rockwell Hanford Operations. This update is supplementary; therefore, references cited in the original document have not been included here. What is included are materials that have become available since the original publication and pertinent literature that had originally been overlooked. Accompany this updated bubliography are index maps that show locations of geologic studies and geochemical petrographic, remanent paleomagnetic, and radiometric age-dated sites within the Columbia River Basalt Group field within Idaho; also identified are archeological sites, test wells, mines, quarries, and other types of excavations. References on the index maps are keyed to the bibliography and cover the Spokane, Pullman, Hamilton, Grangeville, Elk City, Baker, Boise, and Jordan Valley Army Map Service two-degree quadrangles.
Date:
January 1, 1980
Creator:
Strowd, W.
Object Type:
Report
System:
The UNT Digital Library
ADIP ORNL contribution: 12th ADIP quarterly progress report for period October-December 1980. [Nb-1Zr]
The following ADIP tasks are reported on: MFE-5 in-reactor fatigue crack growth in 316 SS in ORR, titanium alloy tensile properties after neutron irradiation in EBR-II, voids in neutron-irradiated Ti alloys, fabrication of ferritic alloys for RB-1 experiment in HFIR, microstructural examination of commercial ferritic alloys irradiated to very high fluence, microstructural examination of HT-9 archive material from the AD-2 test, and swelling of commercial alloys irradiated to a very high fluence. (DLC)
Date:
January 1, 1980
Creator:
Puigh, R.; Duncan, D.; Ermi, A.M.; Gelles, D. & Zimmerchied, M.
Object Type:
Report
System:
The UNT Digital Library
Advanced absorber assembly design for breeder reactors
An advanced absorber assembly design has been developed for breeder reactor control rod applications that provides for improved in-reactor performance, longer lifetimes, and reduced fabrication costs. The design comprises 19 vented pins arranged in a circular array inside of round duct tubes. The absorber material is boron carbide; cladding and duct components are constructed from the modified Type 316 stainless steel alloy. Analyses indicate that this design will scram 30 to 40% faster than the reference FFTF absorber assembly. The basic design characteristics of this advanced FFTF absorber assembly are applicable to large core breeder reactor design concepts.
Date:
January 1, 1980
Creator:
Pitner, A.L. & Birney, K.R.
Object Type:
Article
System:
The UNT Digital Library
Advanced amorphous materials for photovoltaic conversion. Annual report, October 1, 1978-September 30, 1979
The objectives of this project are twofold: (1) to investigate new amorphous semiconductor (a-SC) materials, in which recombination centers are passivated, using plasma deposition techniques; and (2) to characterize the optoelectronic properties pertaining to both majority-carrier and minority-carrier transport in as-deposited films and in devices. The electronic properties of plasma-deposited a-Si:H alloys were studied as functions of oxygen and nitrogen impurities. Over a wide range of processing conditions, features displayed by the data include: (1) anomalous behavior in photoconductivity versus temperature for films deficient in either, or both, impurities (peaks appear that are associated with thermal-quenching processes and supralinearity); and (2) modification to classic behavior in photoconductivity owing to synergistic effects of oxygen and nitrogen. Correlations with photoluminescence were observed. Within the context of an emerging spectroscopy, optical emission spectroscopy was found to be a useful technique for the detection of emitting reactive species in the plasma. The presence of impurities, such as N/sub 2/ and chlorosilanes, was diagnosed.
Date:
January 1, 1980
Creator:
Griffith, R. W.; Kampas, F. J.; Vanier, P. E. & Hirsch, M. D.
Object Type:
Report
System:
The UNT Digital Library
Advanced amorphous materials for photovoltaic conversion. Semiannual report, October 1, 1979-March 31, 1980
The primary objectives of this project are twofold: (i) to investigate new amorphous semiconductor (a-Sc) materials, in which recombination centers are passivated, using plasma deposition techniques; and (ii) to characterize the optoelectronic properties pertaining to both majority-carrier and minority-carrier transport in as-deposited films and in devices. The specific goals in FY 1980 are: (i) to continue investigations of the effects of atmospheric impurities, i.e., nitrogen and oxygen, on the optoelectronic properties of a-Si:H alloys; and (ii) to initiate a study of the effects of these impurities upon the photovoltaic conversion efficiencies of diagnostic devices that are fabricated using such alloys. The following activities were emphasized in the program: (i) an expansion of plasma studies using optical emission spectroscopy in order to identify emitting reactive species due to impurities; and (ii) electrical and optical measurements on alloys with calibrated impurity levels by measurments of photoconductivity, photoluminescence, vibrational spectroscopy, etc.; and (iii) completing the apparatus for device measurements of spectral response, dark I-V characteristics, illuminated I-V characteristics, etc. Associated with the last activity, the fabrication of solar cells was begun using low-impurity a-Si:H materials and various a-Si:(H,O,N) alloys. Progress is reported. (WHK)
Date:
January 1, 1980
Creator:
Griffith, R. W.; Delahoy, A. E.; Hirsch, M. D.; Kampas, F. J. & Vanier, P. E.
Object Type:
Report
System:
The UNT Digital Library