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2,497 Matching Results
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Achieving Safety/Risk Goals for Less ATR Backup Power Upgrades
The Advanced Test Reactor probabilistic risk assessment for internal fire and flood events defined a relatively high risk for a total loss of electric power possibly leading to core damage. Backup power sources were disabled due to fire and flooding in the diesel generator area with propagation of the flooding to a common switchgear room. The ATR risk assessment was employed to define options for relocation of backup power system components to achieve needed risk reduction while minimizing costs. The risk evaluations were performed using sensitivity studies and importance measures. The risk-based evaluations of relocation options for backup power systems saved over $3 million from what might have been otherwise considered {open_quotes}necessary{close_quotes} for safety/risk improvement. The ATR experience shows that the advantages of a good risk assessment are to define risk significance, risk specifics, and risk solutions which enable risk goals to be achieved at the lowest cost.
Date:
October 1, 1995
Creator:
Atkinson, S. A.
Object Type:
Article
System:
The UNT Digital Library
Acoustic waves in random ensembles of magnetic fluxes
To analyze the observational data and provide the appropriate diagnostic procedure for photospheric manifestation of solar oscillations it is necessary to take into account strong inhomogeneity of solar atmosphere with respect to distribution of magnetic fields. We study the collective phenomena in the propagation of acoustic waves and unsteady wave-packets through quite regions, sunspots and plages, including time-dependent response of these regions to solar oscillations, the energy transfer mechanisms, frequency shift effects and reradiation of the acoustic waves in higher layers of atmosphere. We show that the dynamics of differently magnetized regions, their dispersion properties, and their response to the propagation of acoustic waves are completely different. We describe the effects caused by the specific distribution and randomness of magnetic flux tubes, which can be observed and which can provide the tools for diagnostic goals.
Date:
October 10, 1995
Creator:
Ryutova, M.P.
Object Type:
Article
System:
The UNT Digital Library
Acoustically enhanced remediation of contaminated soils and ground water. Volume 1
The Phase 1 laboratory bench-scale investigation results have shown that acoustically enhanced remediation (AER) technology can significantly accelerate the ground water remediation of non-aqueous phase liquids (NAPLs) in unconsolidated soils. The testing also determined some of the acoustic parameters which maximize fluid and contaminant extraction rates. A technology merit and trade analysis identified the conditions under which AER could be successfully deployed in the field, and an analysis of existing acoustical sources and varying methods for their deployment found that AER technology can be successfully deployed in-situ. Current estimates of deployability indicate that a NAPL plume 150 ft in diameter can be readily remediated. This program focused on unconsolidated soils because of the large number of remediation sites located in this type of hydrogeologic setting throughout the nation. It also focused on NAPLs and low permeability soil because of the inherent difficult in the remediation of NAPLs and the significant time and cost impact caused by contaminated low permeability soils. This overall program is recommended for Phase 2 which will address the technology scaling requirements for a field scale test.
Date:
October 1, 1995
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Acoustically enhanced remediation of contaminated soils and ground water. Volume 2
This report contains the following analytical reports: hydraulic conductivity and Atterberg limits of porcelain clay; laser particle size analyses of Oklahoma sand, Custer feldspar, porcelain clay and Ajax sand; X-ray diffraction analyses of Custer feldspar and porcelain clay; density and viscosity of canola oil; residual oil saturation analyses of Oklahoma sand samples with canola oil; and residual oil saturation analyses of Oklahoma sand samples with Soltrol.
Date:
October 1, 1995
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Acquisition of Reliable Vacuum Hardware for Large Accelerator Systems
This report talks about the Acquisition of Reliable Vacuum Hardware for Large Accelerator Systems.
Date:
October 1, 1995
Creator:
Welch, K. M.
Object Type:
Report
System:
The UNT Digital Library
Adaption of the Magnetometer Towed Array geophysical system to meet Department of Energy needs for hazardous waste site characterization
This report documents US Department of Energy (DOE)-funded activities that have adapted the US Navy`s Surface Towed Ordnance Locator System (STOLS) to meet DOE needs for a ``... better, faster, safer and cheaper ...`` system for characterizing inactive hazardous waste sites. These activities were undertaken by Sandia National Laboratories (Sandia), the Naval Research Laboratory, Geo-Centers Inc., New Mexico State University and others under the title of the Magnetometer Towed Array (MTA).
Date:
October 1, 1995
Creator:
Cochran, J. R.; McDonald, J. R.; Russell, R. J.; Robertson, R. & Hensel, E.
Object Type:
Report
System:
The UNT Digital Library
Advance concepts for conversion of syngas to liquids. Quarterly report number 2, January 29--April 28, 1995
MeAPO-36 containing various types and concentrations of metals (Mn, Co, Mg and Zn) in the reaction mixture were synthesized. Various levels of crystallinity were observed depending on the type and concentration of these metals and crystallization parameter. Calcination of the samples at 550 C resulted in varying levels of reduction in crystallinity depending on the type of divalent metal incorporated. MeAPO-36 had the highest thermal stability. Ammonia TPD and IR spectrum of pyridine absorption show that MeAPO-36 have concentrations of both Bronsted and Lewis acid sites. Preliminary catalytic evaluation on a wide range of MeAPOs (metal-containing aluminophosphates) show that they were active for the hydroxylation of phenol. Results are presented.
Date:
October 1, 1995
Creator:
Szostak, R.; Abotsi, G.; Mitchell, M.; Ingram, C.; Dai, E.; McClure, C. et al.
Object Type:
Report
System:
The UNT Digital Library
Advance concepts for conversion of syngas to liquids. Quarterly report, September 28, 1994--January 28, 1995
In this study, MeAPO-36 was crystallized from a reaction mixture of molar composition 1.8 Pr{sub 3}N; 0.156 MgO; 0.97 Al{sub 2}O{sub 3}; 0.936 P{sub 2}O{sub 5}; 41.4H{sub 2}O; and 0.31 HOAC at 100 C for 48 h followed by 150 C for 24 to 72 h. Its formation was dependent on the source of aluminum, template concentration and the reaction temperature and time. MeAPO-5 was a competing impurity phase and its formation can be suppressed by changes in the reaction conditions. The report includes a discussion of the synthesis procedure for MeAPO-36 and its characterization by x-ray diffraction.
Date:
October 1, 1995
Creator:
Szostak, R.; Abotsi, G.; Mitchell, M. & Ingram, C.
Object Type:
Report
System:
The UNT Digital Library
Advanced combustor design concepts to control NOx and air toxics. Quarterly report, July--September 1995
The University of Utah, Massachusetts Institute of Technology (MIT), Reaction Engineering International (REI) and ABB/Combustion Engineering have joined together in this research proposal to develop fundamental understanding regarding the impact of fuel and combustion changes on ignition stability and flame characteristics because these critically affect: NO{sub x} emissions, carbon burnout, and emissions of air toxics. Existing laboratory and bench scale facilities are being used to generate critical missing data which will be used to improve the NO{sub x} and carbon burnout submodels in comprehensive combustion simulation tools currently being used by industrial boiler manufacturers. ABB/Combustion Engineering is providing needed fundamental data on the extent of volatile evolution from commercial coals as well as background information on current design needs in industrial practice. Since they will ultimately be a recipient of the enhanced design methodology, they are also providing ongoing review of the practical applicability of the tools being developed. MIT is responsible for the development of an improved char nitrogen oxidation model which will ultimately be incorporated into an enhanced NO{sub x} submodel. Reaction Engineering International is providing the lead engineering staff for the experimental studies and an overall industrial focus for the work based on their use of the …
Date:
October 31, 1995
Creator:
Pershing, D.W.; Lighty, J. & Spinti, J.
Object Type:
Report
System:
The UNT Digital Library
Advanced concept proof-of-principle demonstration: Switchable radioactive neutron source
An advanced concept proof-of-principle demonstration was successfully performed to show the feasibility of a practical switchable radioactive neutron source (SRNS) that can be switched on and off like an accelerator, but without requiring accelerator equipment such as high voltage supply, control unit, etc. This source concept would provide a highly portable neutron source for field radiation measurement applications. Such a source would require minimal, if any, shielding when not in use. The SRNS, previously patented by Argonne staff, provides a means of constructing the alpha-emitting and light-element components of a radioactive neutron source, in such a fashion that these two components can brought together to turn the source ``on`` and then be separated to turn the source ``off``. An SRNS could be used for such field applications as active neutron interrogation of objects to detect fissile materials or to measure their concentration; and to excite gamma-ray emission for detection of specific elements that indicate toxic chemicals, drugs, explosives, etc. The demonstration was performed using Pu-238 as the alpha emitter and Be as the light element, in an air-atmosphere glovebox having no atmosphere purification capability. A stable, thin film of Pu-238 oxide was deposited on a stainless steel planchet. The ``on`` …
Date:
October 1, 1995
Creator:
Rhodes, E.A.; Bowers, D.L.; Boyar, R.E. & Dickerman, C.E.
Object Type:
Report
System:
The UNT Digital Library
Advanced gas turbine systems research quarterly report, July-- September 1995
Major accomplishments and reports issued during the quarter are reported.
Date:
October 1, 1995
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced Ge detectors for infrared and MM waves
None
Date:
October 1, 1995
Creator:
Haller, E.E.
Object Type:
Report
System:
The UNT Digital Library
Advanced Materials Laboratory hazards assessment document
The Department of Energy Order 55OO.3A requires facility-specific hazards assessments be prepared, maintained, and used for emergency planning purposes. This hazards assessment document describes the chemical and radiological hazards associated with the AML. The entire inventory was screened according to the potential airborne impact to onsite and offsite individuals. The air dispersion model, ALOHA, estimated pollutant concentrations downwind from the source of a release, taking into consideration the toxicological and physical characteristics of the release site, the atmospheric conditions, and the circumstances of the release. The greatest distance at which a postulated facility event will produce consequences exceeding the Early Severe Health Effects threshold is 23 meters. The highest emergency classification is a General Emergency. The Emergency Planning Zone is a nominal area that conforms to DOE boundaries and physical/jurisdictional boundaries such as fence lines and streets.
Date:
October 1, 1995
Creator:
Barnett, B. & Banda, Z.
Object Type:
Report
System:
The UNT Digital Library
The Advanced Photon Source: A national synchrotron radiation research facility at Argonne National Laboratory
The vision of the APS sprang from prospective users, whose unflagging support the project has enjoyed throughout the decade it has taken to make this facility a reality. Perhaps the most extraordinary aspect of synchrotron radiation research, is the extensive and diverse scientific makeup of the user community. From this primordial soup of scientists exchanging ideas and information, come the collaborative and interdisciplinary accomplishments that no individual alone could produce. So, unlike the solitary Roentgen, scientists are engaged in a collective and dynamic enterprise with the potential to see and understand the structures of the most complex materials that nature or man can produce--and which underlie virtually all modern technologies. This booklet provides scientists and laymen alike with a sense of both the extraordinary history of x-rays and the knowledge they have produced, as well as the potential for future discovery contained in the APS--a source a million million times brighter than the Roentgen tube.
Date:
October 1, 1995
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced radiation techniques for inspection of diesel engine combustion chamber materials components. Final report
Heavy duty truck engines must meet stringent life cycle cost and regulatory requirements. Meeting these requirements has resulted in convergence on 4-stroke 6-in-line, turbocharged, and after-cooled engines with direct-injection combustion systems. These engines provide much higher efficiencies (42%, fuel consumption 200 g/kW-hr) than automotive engines (31%, fuel consumption 270 g/kW-hr), but at higher initial cost. Significant near-term diesel engine improvements are necessary and are spurred by continuing competitive, Middle - East oil problems and Congressional legislation. As a result of these trends and pressures, Caterpillar has been actively pursuing a low-fuel consumption engine research program with emphasis on product quality through process control and product inspection. The goal of this project is to combine the nondestructive evaluation and computational resources and expertise available at LLNL with the diesel engine and manufacturing expertise of the Caterpillar Corporation to develop in-process monitoring and inspection techniques for diesel engine combustion chamber components and materials. Early development of these techniques will assure the optimization of the manufacturing process by design/inspection interface. The transition from the development stage to the manufacturing stage requires a both a thorough understanding of the processes and a way of verifying conformance to process standards. NDE is one of the …
Date:
October 9, 1995
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced sulfur control concepts in hot-gas desulfurization technology. Quarterly technical progress report, July--September 1995
Both the Antek total sulfur analyzer and the modifications to the Shimadzu GC-14A gas chromatograph to be used for analysis for SO{sub 2} and H{sub 2}S were delivered during the quarter. Problems were faced during the installation and calibration phases of both instruments. By the end of the quarter we believe that the GC problems have been solved, but problems remain with the Antek analyzer. It appears that too much sulfur (as SO{sub 2}) reaches the UV detector and causes it to become saturated. This shows up as a maximum in the instrument calibration curve. At 200 psia, the capillary flow restrictor allows a total flow rate of about 180 sccm, and the maximum occurs at about 1 % H{sub 2}S in the calibration gas. Reducing the pressure so that the total flow is reduced to about 25 sccm shifts the calibration curve maximum to about 5.7% H{sub 2}S. It appears that we must reduce the total flow rate to the detector or provide additional dilution. This may be accomplished by increasing the resistance of the capillary restrictor, by diverting a portion of the flow leaving the pyrotube to vent, or adding an inert such as N{sub 2} to the …
Date:
October 1, 1995
Creator:
Harrison, D.P.
Object Type:
Report
System:
The UNT Digital Library
Advanced thermally stable jet fuels. Technical progress report, July 1995--September 1995
The Penn State program in advanced thermally stable jet engine fuels has five components: development of mechanisms of degradation and solids formation; quantitative measurement of growth of sub-micrometer-sized and micrometer particles suspended in fuels during thermal stresses; characterization of carbonaceous deposits by various instrumental and microscopic methods; elucidation of the role of additives in retarding the formation of carbonaceous solids; and assessment of the potential of producing high yields of cycloalkanes and hydroaromatics by direct coal liquefaction. Progress is described.
Date:
October 1, 1995
Creator:
Schobert, H.H.; Eser, S. & Song, C.
Object Type:
Report
System:
The UNT Digital Library
Advisory Committee on human radiation experiments final report
When the Advisory Committee began work in April 1994 we were charged with determining whether the radiation experiments design and administration adequately met the ethical and scientific standards, including standards of informed consent, that prevailed at the time of the experiments and that exist today and also to determine the ethical and scientific standards and criteria by which it shall evaluate human radiation experiments. Although this charge seems straightforward, it is in fact difficult to determine what the appropriate standards should be for evaluating the conduct and policies of thirty or fifty years ago. First, we needed to determine the extent to which the standards of that time are similar to the standards of today. To the extent that there were differences we needed to determine the relative roles of each in making moral evaluations. In Chapter 1 we report what we have been able to reconstruct about government rules and policies in the 1940s and 1950s regarding human experiments. We focus primarily on the Atomic Energy Commission and the Department of Defense. In Chapter 2 we turn from a consideration of government standards to an exploration of the norms and practices of physicians and medical scientists who conducted research …
Date:
October 1, 1995
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[Aerial Majesty: Exploring the Vast Beauty of the Rose Garden]
This stunning aerial photograph allows you to immerse yourself in the vast splendor of the Rose Garden from a captivating bird's-eye view. Stretching across 14 acres, the garden unveils a mesmerizing array of thousands of blooming rose bushes, adorned in delightful shades of pink. The aerial perspective showcases the meticulous layout of walkways, charming gazebos, and carefully cultivated collections of roses, camellias, and day lilies. Behold the harmonious blend of nature's grace and thoughtful design, as the Rose Garden offers a breathtaking haven for all who venture into its floral wonderland.
Date:
October 1995
Creator:
Mallory, Randy
Object Type:
Photograph
System:
The UNT Digital Library
[Aerial Splendor: A Breathtaking View of the Rose Garden]
This captivating aerial photograph captures the grandeur and beauty of the Rose Garden from a bird's-eye perspective. Spread across 14 acres, the garden showcases a mesmerizing tapestry of thousands of rose bushes in full bloom, creating a breathtaking sea of vibrant colors and delightful fragrances. From this vantage point, visitors can witness the meticulously designed pathways, elegant gazebos, and carefully curated collections of roses, camellias, and day lilies. The aerial view provides a unique and awe-inspiring glimpse into the harmonious symphony of nature and design, making the Rose Garden an enchanting oasis for all who visit.
Date:
October 1995
Creator:
Mallory, Randy
Object Type:
Photograph
System:
The UNT Digital Library
AFBC co-firing of coal and hospital waste. Quarterly progress report, November 1, 1994--January 31, 1995
The project objective is to design, construct, install, and start-up a circulating fluidized bed combustion system at the Lebanon, Pennsylvania Veteran`s Affairs Medical Center. The unit will co-fire coal and hospital waste providing inexpensive and efficient destruction of both general and infectious medical waste and steam generation. Progress to date on several tasks is described. These are: Task 1.A-1.D, Design; Equipment purchase and fabrication; Installation; and Shredder system verification. Other tasks to be undertaken are: Start-up; Obtaining permits; Procuring coal, limestone and ash disposal contracts; and Conducting on-year test program. Project costs are enumerated.
Date:
October 1, 1995
Creator:
Stuart, J. M.
Object Type:
Report
System:
The UNT Digital Library
Affirmation News, Volume 4, Number 10, October 1995
Newsletter of the Dallas chapter of the United Methodists for Lesbian, Gay, and Bisexual Concerns discussing the group's activities and other news, events, and information of interest to members.
Date:
October 1995
Creator:
United Methodists for Lesbian, Gay, and Bisexual Concerns
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
African-American Participation At The United Nations
This report discusses the variety of roles African Americans have played at the United Nations, and their impact. Moreover, the report details several distinct cases in which African Americans played key roles in peace talks.
Date:
October 20, 1995
Creator:
Bite, Vita & Carmi, Juanita
Object Type:
Report
System:
The UNT Digital Library
After-action summary for handshake one
The Federal Radiological Monitoring and Assessment Center (FRMAC) conducted a three day training drill May 17 through May 19, 1994 at the Nevada Test Site (NTS). The drill was designed to provide training to field monitors and data assessors who would respond to a major radiological emergency. The drill was named ``HANDSHAKE ONE`` to symbolize the strong FRMAC relationship between the federal and state radiological agencies.
Date:
October 1, 1995
Creator:
Hopkins, R.C.
Object Type:
Article
System:
The UNT Digital Library