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Environmental studies group. Annual report for 1978

Description: Group projects included radioecological studies of aquatic and terrestrial systems, land management activities, foodstuff monitoring, dust transport studies including fugitive dust measurements and modeling, and several support programs involving evaluation of the plant's ambient air samplers and airborne tritium monitoring techniques. Some salient results from the several project reports include determination of an appropriate model for mechanically generated fugitive dust dispersion, a r… more
Date: August 21, 1980
Creator: Hunt, D. C. & Hurley, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Three-dimensional temperature history of a multipass filled weldment. Part 2. [HEATINGS]

Description: Computer simulation of the three-dimensional temperature history in a multipass filled weldment was attempted by modifying a transient heat transfer code, HEATING5. The model includes temperature-dependent physical parameters, radiation and convection heat losses, turbulent and laminar convection in the molten pool, and variable arc velocity, intensity, and weld geometry. The model requires approximately 28 CPU min to simulate one second of welding. 15 figures, 8 tables.
Date: December 21, 1976
Creator: Pinkowish, J.A. & Whitman, P.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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X-ray diffraction study of reversible deformation mechanisms in the aged uranium-6. 5 niobium alloy

Description: The x-ray diffraction (XRD) data from 200/sup 0/C/2h-aged uranium-6.5 wt % niobium (U-6.5Nb) alloys, taken under stress as a function of strain, revealed a gamma-zero (..gamma../sup 0/)..-->.. alpha prime-prime (..cap alpha..'') thermoelastic martensitic phase transformation. It was concluded that the primary reversible deformation modes consisted of the movement of ..gamma../sup 0//..cap alpha..'' interphase interfaces and ..cap alpha..'' intervariant interfaces. Specimen elasticity at low str… more
Date: June 21, 1985
Creator: Carpenter, D.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Qualification of tribological materials and coatings for use in sodium. [LMFBR]

Description: This paper describes some of the essential performance measures used to qualify materials for tribological applications in liquid sodium environments and summarizes relative properties of some of the newer tribological materials now qualified for use in sodium systems.
Date: April 21, 1980
Creator: Johnson, R. N. & Farwick, D. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fundamental study of crack initiation and propagation. [Computer model of ductile fracture]

Description: Objective is to determine the fracture toughness of A533B-1 steel by computer modeling Charpy V-notch tests. A computer model of ductile fracture was developed that predicts fracture initiation. The model contains a set of material-dependent parameters obtained by computer simulations of small specimen tests. The computer calculations give detailed stress and strain histories up to the time of fracture, which are used to determine the model parameter values. The calibrated fracture model, that … more
Date: December 21, 1977
Creator: Norris, D.M. Jr.; Reaugh, J.E.; Moran, B.; Quinones, D.F. & Wilkins, M.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Literature search for the non-aqueous separation of zinc from fuel rod cladding. [After dissolution in liquid metal]

Description: This report reviews the literature of processes for the nonaqueous separation of zinc from dissolved fuel assembly cladding. The processes considered were distillation, pyrochemical processing, and electrorefining. The last two techniques were only qualitatively surveyed while the first, distillation, was surveyed in detail. A survey of available literature from 1908 through 1978 on the distillation of zinc was performed. The literature search indicated that a zinc recovery rate in excess of 95… more
Date: June 21, 1980
Creator: Sandvig, R. L.; Dyer, S. J.; Lambert, G. A. & Baldwin, C. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aluminum and polymeric coatings for protection of uranium

Description: Ion-plated aluminum films on uranium will not provide adequate protection for 25 years. Magnetron-plated aluminum films on uranium are much better than ion-plated ones. Kel-F 800 films on uranium can provide adequate protection for 25 years. Their use in production must be delayed until the following factors are sorted out: water permeability in Kel-F 800 must be determined between 30 and 60/sup 0/C; the effect of UF/sub 3/, at the Kel-F/metal interface, on the permeability of water must be ass… more
Date: December 21, 1983
Creator: Colmenares, C.; McCreary, T.; Monaco, S.; Walkup, C.; Gleeson, G.; Kervin, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Relaxation of neodymium in a weakly ionized expanding plasma

Description: The laser resonance absorption technique has been used to determine the relaxation rate of electronically excited neodymium vapor during its expansion into vacuum. Significant increases of population into ground and 1128 cm/sup -1/ levels were found. Analysis shows that interaction between excited metastable atoms and electrons are much more important for relaxation than atom-atom collisions. The final population of neodymium appears to be frozen at a temperature lower than the surface temperat… more
Date: June 21, 1977
Creator: Chen, H. L.; Bedford, R.; Borzileri, C.; Brunner, W. & Hayes, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Magnetic-field considerations in superferric dipole

Description: Iron dominated magnets are characterized in the limit of infinite permeability by a pole shape that is a magnetic equipotential. Deviations from this ideal because of finite permeability are associated with differences in path length, local saturation, flux concentration in slotted pole if crenellation is used, and sub surface voids. For moderate field levels the variation in flux path length throughout the iron lowers the magnetic potential on the iron surface more for the longer paths. As the… more
Date: March 21, 1983
Creator: Snowdon, S.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fabrication and evaluation of transmissive multilayer optics for 8 keV x rays

Description: We have made and tested several sliced multilayer structures which can function as transmissive x-ray optical elements (diffraction gratings, zone plates, and phase gratings) at 8 keV. Our automated multilayer sputtering system is optimized to sputter layers of arbitrary thickness for very large total deposits at high deposition rates. Diffraction patterns produced by the multilayer devices closely match theoretical predictions. Such transmissive optics have the potential for wide application i… more
Date: January 21, 1988
Creator: Bionta, R. M.; Jankowski, Alan Frederic & Makowiecki, D. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of Electrochemical Photovoltaic Cells. Second Technical Progress Report, August 1, 1979-October 31, 1979

Description: The development of stable, efficient, photoelectrochemical cells based on silicon and gallium arsenide in non-aqueous electrolyte systems is being investigated. Redox reactions of ferrocene, anthracene and anthraquinone have been studied on platinum and n-silicon electrodes. The latter have been further characterized by differential capacitance measurements. Cells and equipment have been designed and set up for long-term stability studies.
Date: November 21, 1979
Creator: Austin, A. E.; Byker, H. J. & Brooman, E. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

End-Of-Life Vehicle Recycling: State of the Art of Resource Recovery From Shredder Residue.

Description: Each year, more than 50 million vehicles reach the end of their service life throughout the world. More than 95% of these vehicles enter a comprehensive recycling infrastructure that includes auto parts recyclers/dismantlers, remanufacturers, and material recyclers (shredders). Today, about 75% of automotive materials are profitably recycled via (1) parts reuse and parts and components remanufacturing and (2) ultimately by the scrap processing (shredding) industry. The process by which the scra… more
Date: March 21, 2007
Creator: Jody, B. J.; Daniels, E. J. & Systems, Energy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Discrimination Report: ESTCP UXO Discrimination Study, ESTCPProject #MM-0437

Description: The FY06 Defense Appropriation contains funding for the 'Development of Advanced, Sophisticated, Discrimination Technologies for UXO Cleanup' in the Environmental Security Technology Certification Program. In 2003, the Defense Science Board observed: 'The problem is that instruments that can detect the buried UXOs also detect numerous scrap metal objects and other artifacts, which leads to an enormous amount of expensive digging. Typically 100 holes may be dug before a real UXO is unearthed! Th… more
Date: December 21, 2007
Creator: Gasperikova, Erika; Smith, J. Torquil; Morrison, H. Frank & Becker, Alex
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Bonding Low-density Nanoporous Metal Foams Using Sputtered Solder

Description: A method has been developed for bonding low-density nanoporous metal foam components to a substrate using solder that is sputtered onto the surfaces. Metal foams have unusual properties that make them excellent choices for many applications, and as technologies for processing these materials are evolving, their use in industry is increasing dramatically. Metal foams are lightweight and have advantageous dynamic properties, which make them excellent choices for many structural applications. They… more
Date: August 21, 2007
Creator: Bono, M.; Cervantes, O.; Akaba, C.; Hamza, A.; Foreman, R. & Teslich, N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Water-molten uranium hazard analysis. Final report. LATA report No. 92

Description: The hazard potential of cooling water leakage into the crucible of molten uranium in the MARS laser isotope separation experiment was investigated. A vapor-phase explosion is highly unlikely in any of the scenarios defined for MARS. For the operating basis accident, the gas pressure transient experienced by the vessel wall is 544 psia peak with a duration of 200 ..mu..s, and the peak hoop stress is about 20,000 psi in a 0.5-in. wall. Design and procedural recommendations are given for reducing … more
Date: August 21, 1979
Creator: Hughes, P.S.; Rigdon, L.D. & Donham, B.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reactor for simulation and acceleration of solar ultraviolet damage

Description: An environmental test chamber providing acceleration of uv radiation and precise temperature control (+- 1/sup 0/C) has been designed, constructed and tested. This chamber allows acceleration of solar ultraviolet up to 30 suns while maintaining temperature of the absorbing surface at 30/sup 0/C to 60/sup 0/C). This test chamber utilizes a filtered medium pressure mercury arc as the source of radiation, and a combination of selenium radiometer and silicon radiometer to monitor solar ultraviolet … more
Date: September 21, 1979
Creator: Laue, E. & Gupta, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Human health implications of geothermal energy

Description: Environmental problems consist of the release of noncondensable gases and vapors, disposal of saline fluids, possible land subsidence and enhanced seismicity, noise, accidents such as well blowouts, and socioeconomic impacts. The most important issue related to human health is believed to be the emission of noncondensable gases, including hydrogen sulfide, mercury, and radon. Based upon data at The Geysers, California, Power Plant, emissions of mercury and radon are not large enough to result i… more
Date: August 21, 1979
Creator: Anspaugh, L. R. & Hahn, J. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nuclear Chemistry Project. Progress report, Janary 1, 1979-December 31, 1979

Description: The first on-line operation of the Princeton electron spectrometer was achieved and its capability for fast life time measurements demonstrated. The first operation of the heavy ion source was achieved and beams of 75 meV /sup 12/C/sup +4/ ions and 37 MeV /sup 6/Li/sup +2/ ions demonstrated. The capability of the isotope separator to provide pure mass separated samples of radioisotopes is being utilized for three different applications. The very weak electron capture branch of 19-s krypton 81m … more
Date: December 21, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Actinide recycle in LMFBRs as a waste management alternative

Description: A strategy of actinide burnup in fast reactor systems has been investigated as an approach for reducing the long term hazards and storage requirements of the actinide waste elements and their decay daughters. The actinide recycle studies also included plutonium burnup studies in the event that plutonium is no longer required as a fuel. Particular emphasis was placed upon the timing of the recycle program, the requirements for separability of the waste materials, and the impact of the actinides … more
Date: August 21, 1979
Creator: Beaman, S.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Segregation effects in JBK-75

Description: Chemical segregation of alloying elements, can be a severe problem in complex alloys. Many problems have been experienced with developing fabrication processes for JBK-75 and it is suggested that these difficulties may be related in part to the degree of chemical heterogeneity that exists in the alloy. Early testing and qualification of the alloy was made on relatively homogeneous samples, which came from small diameter ingots. In large size ingots used for production, it is more difficult to a… more
Date: December 21, 1979
Creator: Mataya, M. C.; Edstrom, C. M.; Krenzer, R. W. & Doyle, J. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Decommissioning of Division of Military Application equipment at Richland Operations Office for period ending June 30, 1975

Description: Decommissioning of the DMA facilities is estimated at 65% complete compared to 60% forecast at the start of the program in April 1974. The transfer of 12 transuranic boxes to 20-year retrievable storage this quarter brings the total to date to 26, and includes all of the inspection area glove boxes and conveyor sections, four A-Line and two C-Line glove boxes, along with all auxiliary hydraulic equipment pumps, and piping serving the three areas. Removal of additional A-Line and C-Line conveyor… more
Date: July 21, 1975
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electron band theory and high pressure equation of state

Description: Calculations of the high pressure equation of state of selected materials are reviewed, in order to illustrate general trends which occur in the evolution of electronic structure with compression, and the consequences of these trends for material properties.
Date: July 21, 1981
Creator: McMahan, A.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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