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1,384 Matching Results
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Westinghouse independent safety review of Savannah River production reactors
Westinghouse Electric Corporation has performed a safety assessment of the Savannah River production reactors (K,L, and P) as requested by the US Department of Energy. This assessment was performed between November 1, 1988, and April 1, 1989, under the transition contract for the Westinghouse Savannah River Company's preparations to succeed E.I. du Pont de Nemours Company as the US Department of Energy contractor for the Savannah River Project. The reviewers were drawn from several Westinghouse nuclear energy organizations, embody a combination of commercial and government reactor experience, and have backgrounds covering the range of technologies relevant to assessing nuclear safety. The report presents the rationale from which the overall judgment was drawn and the basis for the committee's opinion on the phased restart strategy proposed by E.I. du Pont de Nemours Company, Westinghouse, and the US Department of Energy-Savannah River. The committee concluded that it could recommend restart of one reactor at partial power upon completion of a list of recommended upgrades both to systems and their supporting analyses and after demonstration that the organization had assimilated the massive changes it will have undergone.
Date:
April 1, 1989
Creator:
Leggett, W. D.; McShane, W. J. (Westinghouse Hanford Co., Richland, WA (USA)); Liparulo, N. J.; McAdoo, J. D.; Strawbridge, L. E. (Westinghouse Electric Corp., Pittsburgh, PA (USA). Nuclear and Advanced Technology Div.); Toto, G. (Westinghouse Electric Corp., Pittsburgh, PA (USA). Nuclear Services Div.) et al.
Object Type:
Report
System:
The UNT Digital Library
Assessment of the theory and hypotheses of the acidification of watersheds
This report documents and critically assesses the evolution and status of the scientific understanding of the effects of acidic deposition on surface waters. The main conclusion is that the dominant theory of surface-water acidification fails to adequately incorporate many important factors and processes that influence surface water acidity. Some of these factors and processes are not well researched or recognized as being important by most scientists in the aquatic effects research area. 258 refs., 14 figs., 23 tabs.
Date:
April 1, 1989
Creator:
Krug, E.C.
Object Type:
Report
System:
The UNT Digital Library
Simulation of ethylbenzene dehydrogenation in microporous catalytic membrane reactors
Current state-of-the-art inorganic oxide membranes offer the potential of being modified to yield catalytic properties. The resulting modules may be configured to simultaneously induce catalytic reactions with product concentration and separation in a single processing step. Processes utilizing such catalytically active membrane reactors have the potential for dramatically increasing yield of reactions which are currently limited by either thermodynamic equilibria, product inhibition, or kinetic selectivity. Examples of systems of commercial interest include hydrogenation, dehydrogenation, partial and selective oxidation, hydrations, hydrocarbon cracking, olefin metathesis, hydroformylation, and olefin polymerization. A large portion of the most significant reactions fall into the category of high temperature, gas phase chemical and petrochemical processes. Microporous oxide membranes are well suited for these applications. A program is proposed to investigate selected model reactions of commercial interest (i.e., dehydrogenation of ethylbenzene to styrene and dehydrogenation of butane to butadiene) using a high temperature catalytic membrane reactor. Membranes will be developed, reaction dynamics characterized, and production processes developed, culminating in laboratory-scale demonstration of technical and economic feasibility. As a result of the anticipated increased yield per reactor pass, large economic incentives are envisioned. First, a large decrease in the temperature required to obtain high yield should be possible because …
Date:
April 1, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Modeling of Integrated Environmental Control Systems for Coal-Fired Power Plants Quarterly Report: January-March 1989
This is the sixth quarterly report of DOE Contract No. DE-AC22- 87PC79863, entitled Modeling of Integrated Environmental Control Systems for Coal-Fired Power Plants.'' This report summarizes accomplishments during the period January 1, 1989 to March 31, 1989. Efforts this past quarter focused primarily on the preparation of a computer User's Guide for the Integrated Environmental Control Model (IECM). Drafts of the first two chapters are now complete. These chapters constitute the bulk of this quarterly report. Drafts of the remaining chapters are in preparation, and will appear in a future report this year. We also have been working closely with DOE/PETC to define the computer configuration to be transferred to PETC as a contract deliverable. That process is now complete and the equipment is on order. Delivery of the IECM to PETC is expected during the next calendar quarter. Finally, we are continuing our efforts to develop and refine a number of clean coal technology process models. These efforts will be summarized and reported at a future date.
Date:
April 1, 1989
Creator:
Rubin, E. S.
Object Type:
Report
System:
The UNT Digital Library
MHD compressor---expander conversion system integrated with GCR inside a deployable reflector
This work originates from the proposal MHD Compressor-Expander Conversion System Integrated with a GCR Inside a Deployable Reflector''. The proposal concerned an innovative concept of nuclear, closed-cycle MHD converter for power generation on space-based systems in the multi-megawatt range. The basic element of this converter is the Power Conversion Unit (PCU) consisting of a gas core reactor directly coupled to an MHD expansion channel. Integrated with the PCU, a deployable reflector provides reactivity control. The working fluid could be either uranium hexafluoride or a mixture of uranium hexafluoride and helium, added to enhance the heat transfer properties. The original Statement of Work, which concerned the whole conversion system, was subsequently redirected and focused on the basic mechanisms of neutronics, reactivity control, ionization and electrical conductivity in the PCU. Furthermore, the study was required to be inherently generic such that the study was required to be inherently generic such that the analysis an results can be applied to various nuclear reactor and/or MHD channel designs''.
Date:
April 20, 1989
Creator:
Tuninetti, G. (Ansaldo S.p.A., Genoa (Italy). Research Div.); Botta, E.; Criscuolo, C.; Riscossa, P. (Ansaldo S.p.A., Genoa (Italy). Nuclear Div.); Giammanco, F. (Pisa Univ. (Italy). Dipt. di Fisica) & Rosa-Clot, M. (Florence Univ. (Italy). Dipt. di Fisica)
Object Type:
Report
System:
The UNT Digital Library
Establishment and maintenance of a coal sample bank and data base
During the current reporting period a total of 139 samples (46 DOE Sample Bank samples and 93 other Penn State samples) of various sizes were distributed. Sixty-three of the samples were distributed to DOE or its contractors; 76 were distributed to other agencies. A total of 88 data printouts were distributed. In addition, seven special data requests were fulfilled by either search/sort and printout or creation of a data disk. Several preliminary requests for Sample Bank and Data Base information have also been handled.
Date:
April 19, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
COMMIX analysis of four constant flow thermal upramp experiments performed in a thermal hydraulic model of an advanced LMR
The three-dimensional thermal hydraulics computer code COMMIX-1AR was used to analyze four constant flow thermal upramp experiments performed in the thermal hydraulic model of an advanced LMR. An objective of these analyses was the validation of COMMIX-1AR for buoyancy affected flows. The COMMIX calculated temperature histories of some thermocouples in the model were compared with the corresponding measured data. The conclusions of this work are presented. 3 refs., 5 figs.
Date:
April 1989
Creator:
Yarlagadda, B. S.
Object Type:
Article
System:
The UNT Digital Library
Phase formation in the Pt/InP thin film system
InP substrates with 40nm metal films of Pt were encapsulated in SiO{sub 2}, and isochronally annealed up to 600{degrees}C in flowing forming gas. The composition and morphology of the phases that formed were studied using x-ray diffraction, Rutherford Backscattering, and transmission electron microscopy. Results show that the Pt/InP system begins interacting at 300{degrees}C. TEM analysis of the 350{degrees}C anneal shows unreacted Pt and additional polycrystalline phases, with no observed orientation relationship with the substrate. The Pt layer has been completely consumed by 400{degrees}C, with a uniform reacted layer indicated by RBS. At high temperatures (between 500{degrees}C and 600{degrees}C), the reaction products are PtIn{sub 2} and PtP{sub 2}. The two phases show a tendency for phase separation, with a higher concentration of PtP{sub 2} at the InP/reacted layer interface. The phosphide phase also shows a preferred orientation relationship with the substrate. 14 refs., 5 figs.
Date:
April 1, 1989
Creator:
Olson, D.A.; Yu, K.M.; Washburn, J. (Lawrence Berkeley Lab., CA (United States)) & Sands, T. (Bellcore, Red Bank, NJ (United States))
Object Type:
Article
System:
The UNT Digital Library
[Portion of Newspaper Article]
Portion of an article discussing the difficulties students at the Texas Academy of Mathematics and Science have in leaving their families at such a young age.
Date:
April 26, 1989
Creator:
Jamos, Cathy
Object Type:
Clipping
System:
The UNT Digital Library
TAMS closes first year with success
Article discussing the successes of the first class of Texas Academy of Mathematics and Science students, and th difficulties they had in adjusting to living away from home.
Date:
April 26, 1989
Creator:
Jamos, Cathy
Object Type:
Clipping
System:
The UNT Digital Library
Guest Artist Recital: 1989-04-01 - Maria Casale, harp
Access:
Use of this item is restricted to the UNT Community
A guest artist recital performed at the UNT College of Music Recital Hall.
Date:
April 1, 1989
Creator:
Casale, Maria
Object Type:
Sound
System:
The UNT Digital Library
Proceedings of the Focused Research Program on Spectral Theory and Boundary Value Problems, Vol. 3: Linear Differential Equations and Systems
The third volume of a series of reports containing the proceedings of the Focused Research Program on "Spectral Theory and Boundary Value Problems."
Date:
April 1989
Creator:
Kaper, H. G.; Kwong, Man Kam & Zettl, Anton
Object Type:
Report
System:
The UNT Digital Library
Math, science group ahead of schedule
Newspaper clipping discussing the success of the current class of the Texas Academy of Mathematics and Science.
Date:
April 3, 1989
Creator:
unknown
Object Type:
Clipping
System:
The UNT Digital Library
[Letter from Ann Lupkowski to James Miller, April 30, 1989]
Letter from Ann Lupkowski to James Miller, on April 30, 1989, proposing that the Study of Mathematically Precocious Youth at UNT provide services free of charge. She also asks that she be allowed to hire a student assistant when she comes to UNT.
Date:
April 30, 1989
Creator:
Lupkowski, Ann E.
Object Type:
Letter
System:
The UNT Digital Library
Exploratory orbit analysis of Tevatron helical upgrade: One: A first look
A key feature of the Tevatron upgrade is the placement of proton and anti-proton bunches on the branches of a double helix which winds around the current closed orbit. Electrostatic separators will transfer the bunches on and off the double helix so that they experience head-on collisions only at the experimental areas, B0 and D0, all other encounters occurring at large transverse separation. In this way the number of bunches, and the luminosity, can be increased without a proportional growth in the beam-beam tune shift. The scenario raises a number of beam dynamics issues, especially (a) the consequences of sampling magnetic fields far from the magnets' center lines, and (b) the effects of the long-range beam-beam interaction. This report presents the results of calculations and simulations done to date to explore (b); a Fermilab team have been studying (a), both experimentally and theoretically, but we shall not review those efforts here. 9 refs., 17 figs.
Date:
April 1, 1989
Creator:
Michelotti, L. & Saritepe, S.
Object Type:
Report
System:
The UNT Digital Library
The search for solid state fusion lasers
Inertial confinement fusion (ICF) research puts severe demands on the laser driver. In recent years large, multibeam Nd:glass lasers have provided a flexible experimental tool for exploring fusion target physics because of their high powers, variable pulse length and shape, wavelength flexibility using harmonic generation, and adjustable that Nd:glass lasers can be scaled up to provide a single-phase, multi-megajoule, high-gain laboratory microfusion facility, and gas-cooled slab amplifiers with laser diode pump sources are viable candidates for an efficient, high repetition rate, megawatt driver for an ICF reactor. In both applications requirements for energy storage and energy extraction drastically limit the choice of lasing media. Nonlinear optical effects and optical damage are additional design constraints. New laser architectures applicable to ICF drivers and possible laser materials, both crystals and glasses, are surveyed. 20 refs., 2 figs.
Date:
April 1, 1989
Creator:
Weber, M.J. (Lawrence Livermore National Lab., CA (USA))
Object Type:
Article
System:
The UNT Digital Library
Freihoelser Forst Local Training Area Demonstration Project: Prescription development and installation
The Freiholser Forst Local Training Area (LTA) Rehabilitation Demonstration Project is part of the Integrated Training Area Management program being developed by the US Army Corps of Engineers' Construction Engineering Research Laboratory for the Seventh Army Training Command of the US Army in Europe. The rehabilitation demonstration project was begun in 1987 to develop and demonstrate rapid, cost-effective methods to stabilize the LTA's barren, eroding maneuver areas and make training conditions more realistic. The sandy, infertile, and acidic soils at the LTA are considered the major factor limiting rehabilitation efforts there. The project involves the evaluation of three procedures to revegetate the soils, each incorporating identical methods for preparing the seedbed and a single seed mixture consisting of adapted, native species but using different soil amendments. All three treatments have satisfactorily reestablished vegetation and controlled erosion on the demonstration plots at the LTA, but their costs have varied widely.
Date:
April 1, 1989
Creator:
Hinchman, R.R.; Zellmer, S.D. (Argonne National Lab., IL (United States). Energy Systems Div.); Severinghaus, W.D. (Corps of Engineers, Champaign, IL (United States)) & Brent, J.J. (US Army 282nd Base Support Battalion, Hohenfels (Germany))
Object Type:
Report
System:
The UNT Digital Library
At the head of its class
A newspaper clipping featuring an article on children from Forest Hill Elementary School at the head of their class with high grades in arts education. The article goes into the fact that arts education has been around since the 1950s but there never has been such an interest until now, art education is being re-examined. Art is being viewed as important to all students as a means of enchaining learning and other disciplines such as math and science. The article continues into the hard work that Getty Center and the education reformation program has undergone to see changes in the schools curriculum.
Date:
April 13, 1989
Creator:
Tyson, Janet
Object Type:
Clipping
System:
The UNT Digital Library
Photoinitiated electron transfer in multichromophoric species: Synthetic tetrads and pentads
This research project involves the design, synthesis and study of molecules which mimic many of the important aspects of photosynthetic electron and energy transfer. Specifically, the molecules are designed to mimic the following aspects of natural photosynthetic multistep electron transfer: electron donation from a tetrapyrrole excited singlet state, electron transfer between tetrapyrroles, electron transfer from tetrapyrroles to quinones, and electron transfer between quinones with different redox properties. In addition, they model carotenoid antenna function in photosynthesis (singlet-singlet energy transfer from carotenoid polyenes to chlorophyll) and carotenoid photoprotection from singlet oxygen damage (triplet-triplet energy transfer from chlorophyll to carotenoids).
Date:
April 12, 1989
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Operation of a DC large aperture volume-production H sup minus source
In testing a multicusp volume-production H{sup {minus}} ion source (20 cm diameter, 23 cm long), we optimized the gas pressure, the plasma electrode bias potential and the magnetic filter. At the optimum pressure of 9 mT, the H{sup {minus}} beam output increased linearly with discharge power. The maximum H{sup {minus}} beam, measured with a current transformer downstream of the accelerator, was 100 mA while using a 6.67 cm{sup 2} aperture. Presently we are limited by overheating of the cathodes by the plasma ions. Under similar discharge conditions the maximum H{sup {minus}} current density was found to vary as a{sup {minus}0.7} where a is the aperture radius. Results from emittance measurements showed that the effective H{sup {minus}} ion temperature increased with a for a {gt} 0.8 cm. Thus the brightness of the beam decreased with increasing aperture radius. Operating the source with cesium would increase the H{sup {minus}} output however our accelerator must be improved to avoid breakdowns caused by the cesium contamination. 8 refs., 6 figs.
Date:
April 1, 1989
Creator:
Kwan, J. W.; Ackerman, G. D.; Anderson, O. A.; Chan, C. F.; Cooper, W. S.; deVries, G. J. et al.
Object Type:
Article
System:
The UNT Digital Library
Measurement of the /eta/ parameter in /mu//sup +/ decay
This paper discusses the following topics on the muon plus decay; muon decay spectrum; previous determinations of /eta/; experimental apparatus; distortions of the spectrum; and data analysis and results. 31 figs. (LSP)
Date:
April 1, 1989
Creator:
Bossingham, R.R.
Object Type:
Report
System:
The UNT Digital Library
[Clipping: NT gives special recognition awards]
Article discussing the recipients of the 1989 University of North Texas President's Award (Dr. James Miller) and the President's Special Recognition Award (Dr. Jim Berry Pearson and Rachel Mays). Portions of other articles are on the reverse.
Date:
April 28, 1989
Creator:
Moore, Kelly
Object Type:
Clipping
System:
The UNT Digital Library
Southwest Retort, Volume 42, Number 4, April 1989
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
April 1989
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Holding the Edge: Maintaining the Defense Technology Base
This report examines the management of DoD technology base programs and laboratories. It also analyzes the process through which technology is introduced into defense systems, in order to understand why it takes so long and what might be done to speed the process up. Finally, this report examines the exploitation of civilian commercial sector technology for defense needs. It concentrates on the dual questions of expediting military access to civilian technology and keeping the necessary base of technology alive and well in the United States.
Date:
April 1989
Creator:
United States. Congress. Office of Technology Assessment.
Object Type:
Report
System:
The UNT Digital Library