Serial/Series Title
Chemical Processing Department Monthly Report
41
PETRO Program
6
Winter Fuels Report
5
Irradiation Processing Department Monthly Record Report
3
Hanford Laboratories Operation Monthly Activities Report
2
Hanford Works Monthly Report
2
Irradiation Processing Department Monthly Report
2
Proceedings of the Eleventh Workshop on Geothermal Reservoir Engineering
2
A Real-Time Coal Content/Ore Grade (C2OG) Sensor, Technical Report
1
Fiscal Year 1977
1
22 More
Country
Decade
Month
Day
Language
3,123 Matching Results
Results open in a new window/tab.
Absolute instrumental neutron activation analysis at Lawrence Livermore Laboratory
The Environmental Science Division at Lawrence Livermore Laboratory has in use a system of absolute Instrumental Neutron Activation Analysis (INAA). Basically, absolute INAA is dependent upon the absolute measurement of the disintegration rates of the nuclides produced by neutron capture. From such disintegration rate data, the amount of the target element present in the irradiated sample is calculated by dividing the observed disintegration rate for each nuclide by the expected value for the disintegration rate per microgram of the target element that produced the nuclide. In absolute INAA, the expected value for disintegration rate per microgram is calculated from nuclear parameters and from measured values of both thermal and epithermal neutron fluxes which were present during irradiation. Absolute INAA does not depend on the concurrent irradiation of elemental standards but does depend on the values for thermal and epithermal neutron capture cross-sections for the target nuclides. A description of the analytical method is presented.
Date:
December 21, 1977
Creator:
Heft, R.E.
Object Type:
Article
System:
The UNT Digital Library
Silicon-on ceramic process: silicon sheet growth and device development for the large-area silicon sheet task of the Low-Cost Solar Array Project. Quarterly report No. 14, January 1-March 31, 1980
The purpose of this research program is to investigate the technical and economic feasibility of producing solar-cell-quality sheet silicon by coating inexpensive ceramic substrates with a thin layer of polycrystalline silicon. The coating methods to be developed are directed toward a minimum-cost process for producing solar cells with a terrestrial conversion efficiency of 11% or greater. By applying a graphite coating to one face of a ceramic substrate, molten silicon can be made to wet only that graphite-coated face and produce uniform, thin layers of large-grain polycrystalline silicon; thus, only a minimal quantity of silicon is consumed. A dip-coating method for putting silicon on ceramic (SOC) has been shown to produce solar-cell-quality sheet silicon. This method and a continuous-coating process also being investigated have excellent scale-up potential which offers an outstanding, cost-effective way to manufacture large-area solar cells. The dip-coating investigation has shown that, as the substrate is pulled from the molten silicon, crystallization continues to occur from previously grown silicon. Therefore, as the substrate length is increased (as would be the case in a scaled-up process), the expectancy for larger crystallites increases. Results and accomplishments are reported. (WHK)
Date:
April 21, 1980
Creator:
Whitehead, A B; Zook, J D; Grung, B L; McHenry, K; Schuldt, S B & Chapman, P W
Object Type:
Report
System:
The UNT Digital Library
Innovative Clean Coal Technology (ICCT): 500 MW demonstration of advanced wall-fired combustion techniques for the reduction of nitrogen oxide (NO sub x ) emissions from coal-fired boilers
This quarterly report discusses the technical progress of an Innovative Clean Coal Technology (ICCT) demonstration of advanced wall-fired combustion techniques for the reduction of nitrogen oxide (NO{sub x}) emissions from coal-fired boilers. The project is being conducted at Georgia Power Company's Plant Hammond Unit 4 located near Rome, Georgia. The primary goal of this project is the characterization of the low NO{sub x} combustion equipment through the collection and analysis of long-term emissions data. A target of achieving fifty percent NO{sub x} reduction using combustion modifications has been established for the project. The project provides a stepwise retrofit of an advanced overfire air (AOFA) system followed by low NO{sub x} burners (LNB). During each test phase of the project, diagnostic, performance, long-term, and verification testing will be performed. These tests are used to quantify the NO{sub x} reductions of each technology and evaluate the effects of those reductions on other combustion parameters such as parameters such as particulate characteristics and boiler efficiency.
Date:
April 21, 1992
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The impact of changing land use, nitrate deposition and CO sub 2 fertilization on soil carbon storage
This research strives to assess the impact of changing land use, nitrate deposition and CO{sub 2} fertilization on soil carbon storage. Our motivation is that this reservoir is the most likely candidate for the so-called missing carbon sink. We are working on several aspects of this problem by measuring carbon content, nitrogen content and radiocarbon ratios in paired soil samples from neighboring sites, to determine the impact of land use on soil carbon inventories and turnover times. We are also gathering information on how the C/N ratios in soils vary with climate and changing land use, in an effort to estimate how much carbon has been sequestered as a result of atmospheric fallout of NH{sub 4}OH and HNO{sub 3}. Finally, we are developing a soil greening model that uses CO{sub 2} growth-enhancement results and bomb radiocarbon-based estimates of soil carbon inventory response times.
Date:
May 21, 1992
Creator:
Harrison, K. & Broecker, W.
Object Type:
Report
System:
The UNT Digital Library
Sub-keV, subnanosecond measurements of x-ray spectra from laser-produced plasmas
As part of the effort to extend our x-ray diagnostic capabilities, we have made x-ray spectral measurements of laser-produced plasmas for photon energies down to 100 eV with a time response of 0.5 nsec. Fast, windowless x-ray diodes were used in conjunction with critical angle reflecting mirrors and thin filters for energy definition for two channels, 300 to 600 eV and 800 to 1300 eV. A third channel, using only an x-ray diode and filter, provided spectral information in the 100 to 300 eV region. Results from exploding pusher targets will be presented and compared with those of other diagnostic techniques and Lasnex calculations. Future expansion and modifications of the present system will be discussed.
Date:
October 21, 1977
Creator:
Kornblum, H. N.; Koppel, L. N.; Slivinsky, V. W.; Glaros, S. S.; Ahlstrom, H. G. & Larsen, J. T.
Object Type:
Article
System:
The UNT Digital Library
Hydrogen absorption by YNi/sub 5/, LaPt/sub 5/, and ThNi/sub 5/ intermetallics
The absorption of H by YNi/sub 5/, LaPt/sub 5/ and ThNi/sub 5/ at pressures above those reported in the literature were studied. These alloys were reported to absorb no significant H/sub 2/ at low pressures. (FS)
Date:
February 21, 1980
Creator:
Lakner, J. F. & Takeshita, T.
Object Type:
Report
System:
The UNT Digital Library
Mathematical model of a utility firm. Executive summary
The project was aimed at developing an understanding of the economic and behavioral processes that take place within a utility firm, and without it. This executive summary, one of five documents, gives the project goals and objectives, outlines the subject areas of investigation, discusses the findings and results, and finally considers applications within the electric power industry and future research directions. (DLC)
Date:
August 21, 1983
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Investigation report of the release of strontium-90 from the Building 3517 Cell Ventilation Improvements construction site on November 29, 1985
This Type B Investigative Report provides an evaluation of all relevant events and activities that led to, were an integral part of, and subsequently resulted from ORNL's November-December 1985 strontium-90 release incident. The impacts were evaluated in terms of radiological doses to ORNL and Rust employees associated with the incident, ORGDP employees who consumed potable water potentially impacted by the incident, and Kingston, Tennessee, residents who also consumed potable water potentially impacted by the incident; and in terms of reductions in ORNL's low-level liquid radioactive waste storage capabilities. The management systems evaluated include: (1) those intended to reduce the potential of occurrence of such events and (2) those intended to provide adequate response to such events should they occur. Inherent in the management system evaluations were reviews of applicable planning activities and intra- and inter-organization communications. The composition of the investigation board and its appointment letter are contained in Appendix 1. The investigation process included analyses of existing procedures; analyses of environmental data collected just prior to, during, and subsequent to the event; and interviews and discussions with ORNL, ORGDP, DOE, and Rust Engineering personnel. In addition, written comments on the draft report were received from Rust Engineering (Letter from …
Date:
January 21, 1986
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Automatic x-ray image analysis and sorting of laser fusion targets
A microcomputer-based x-ray image analysis system to select and measure laser fusion targets is described. This system positions a photographic plate in x and y, focuses a microscope image, digitizes and extracts measurements within seconds.
Date:
August 21, 1979
Creator:
Singleton, R.M. & Perkins, D.E.
Object Type:
Article
System:
The UNT Digital Library
Decommissioning of Division of Military Application equipment at Richland Operations Office for period ending March 31, 1975
The scope of the decommissioning work provides for (1) the removal of all Division of Military Application (DH) fabrication and inspection equipment held in standby status in the 234-5Z Building, (2) disposition of all contaminated equipment and materials removed by packaging for 20-year retrievable storage, (3) reclamation of salvageable materials and equipment for use on site by other Energy Research and Development Administration contractors, and (4) restoration of cleared-out areas for other future Richland Operations Office programs.
Date:
April 21, 1975
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
A shock tube study of the reactions of the hydroxyl radical with combustion species
The reactions of OH radicals with hydrocarbons have received a great deal of attention in recent years because of these processes are principal steps in the oxidation of organic fuels -- whether occurring in combustion/propulsion systems, in the atmosphere, or elsewhere. Of the various radicals capable of attacking hydrocarbons, OH radicals are generally the most reactive, and their reactions directly yield water molecules, one of the major final oxidation products. In the atmosphere, the combined effect of the OH radical's reactivity and concentration make it the single species that determines the atmospheric lifetime of an organic substance. The principal goals of the kineticist in the field of oxidation chemistry are (1) to measure as many elementary reaction rate coefficients as are conveniently studied in the laboratory; and (2) to develop theoretical and/or semiempirical tools for extrapolating from measured rate coefficients to unmeasured ones. The latter step is necessary because of the sheer number of reactions of possible interest.
Date:
May 21, 1991
Creator:
Cohen, N.
Object Type:
Report
System:
The UNT Digital Library
Reggeon Field Theory and the phases of QCD
We propose a Reggeon Field Theory phase diagram involving Sub-critical and Super-critical Pomeron behavior and the Expanding Disc. We describe the derivation of Reggeon Field Theory from QCD using infra-red analysis of the reggeon diagrams of the spontaneously broken theory. Matching the Reggeon Field Theory phase-diagram to that of lattice QCD with many fermions has significant implications for the chiral properties of continuum QCD when the number of flavors is less than the maximum allowed by asymptotic freedom. 19 refs., 7 figs.
Date:
July 21, 1987
Creator:
White, A.R.
Object Type:
Article
System:
The UNT Digital Library
Filtered detector arrays for single pulsed photon measurements above 100 keV
We discuss the design of filtered detector arrays for single pulsed, 100 keV photon spectral and angular distribution measurements at the Lawrence Livermore Laboratory Argus laser facility.
Date:
October 21, 1977
Creator:
Tirsell, K.G. & Catron, H.C.
Object Type:
Article
System:
The UNT Digital Library
Single-column-based absorption process for treating dissolver off-gas
The fluorocarbon absorption process for krypton and xenon removal from dissolver off-gas is based on exploitation of solubility differences which exist among noble gases and other gas-phase constituents in the fluorocarbon solvent dichlorofluoromethane (refrigerant-12). Process performance and reliability have been demonstrated on an engineering scale with over 10 years of pilot plant operation, including testing with /sup 85/Kr, /sup 133/Xe, and /sup 131/I. The culmination of this work is a single-column design which results in a simplified process with improved reliability and lower cost. Data are presented summarizing recent single-column development activities. These include data plots depicting decontamination factor vs feed gas flow rate, DF vs process absorption factor (kG/L), and location of the concentration peak via the solvent flow rate. In general, 99% removal is easily obtainable for Kr, Xe, and CO/sub 2/ while attaining concentration factors on the order of 10/sup 3/ to 10/sup 4/. Further concentration of the Kr product is investigated using solid sorbent and cold trapping technologies. Effective removal of entrained fluorocarbon solvent and CO/sub 2/ from the single-column product stream is demonstrated using 13X and 5A molecular sieves, respectively. Additional separation of Xe is studied using a silver mordenite bed and compared to existing …
Date:
May 21, 1982
Creator:
Eby, R. S.; Little, D. K.; Merriman, J. R. & Stephenson, M. J.
Object Type:
Article
System:
The UNT Digital Library
Waste Package Program
This was a progress report on the research program of waste packages at the University of Nevada, Las Vegas. The report has the overviews of what the program has done from January 1991 to June 1991, such as task assignments for personnel, equipment acquisitions, and staff meetings and travels on behalf of the project. Also, included was an abstract on the structural analysis of the waste package container design. (MB)
Date:
July 21, 1991
Creator:
Culbreth, W. & Ladkany, S.
Object Type:
Report
System:
The UNT Digital Library
Plasma production and flow in negative ion beams
Plasma generated in low-density vapor by a negative ion beam has been studied experimentally and computationally. We show that space charge neutralization of the beam occurs at very low vapor density, and that correspondingly the electron density may be much less than the beam and plasma ion densities. When there is a large local gas density, as in a charge changing cell, the resulting high electron density is also localized to the same region. Therefore, very few electrons will reach a negative ion accelerator even if it is placed one or two beam diameters from such a cell.
Date:
September 21, 1977
Creator:
Anderson, O. A. & Hooper, E. B. Jr.
Object Type:
Article
System:
The UNT Digital Library
Tevatron damper system
A fast beam damper system is currently being built for the Tevatron. The system is similar to the Super Damper system in the main ring with increased bandwidth and a pulsed high power mode for injection errors. The purpose of this writeup is to describe the basics of the system, and some of the reasoning behind its design. Calculations of expected performance are also included.
Date:
December 21, 1983
Creator:
Moore, C. & Rice, R.
Object Type:
Report
System:
The UNT Digital Library
Aluminum and polymeric coatings for protection of uranium
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 assessed; and the effect of crystallinity on water permeability must be evaluated. Applying Kel-F films on aluminum ion-plated uranium provides a good interim solution for long term storage.
Date:
December 21, 1983
Creator:
Colmenares, C.; McCreary, T.; Monaco, S.; Walkup, C.; Gleeson, G.; Kervin, J. et al.
Object Type:
Report
System:
The UNT Digital Library
EG G sampling program results FY 1989
Thirty-three waste drums were returned to Rocky Flats in support of EG G Idaho's quality control program for the Stored Waste Examination Pilot Plant. The drums were opened and examined in the size reduction facility at the Rocky Flats Plant. Contents of each drum were consistent with the Item Description Codes; however, four sludge drums and one combustible drum contained free liquids. These five drums failed to meet the Waste Isolation Pilot Plant and the Department of Transporation criteria. The proper amount of cement was not used in the sludge drums. A cemented layering process, which also contributed to accumulation of free liquid, is no longer used when cementing sludges at the Rocky Flats Plant. The drum of combustibles contained a polyethylene bottle with a small amount of liquid sludge inside. 2 refs., 2 tabs.
Date:
June 21, 1991
Creator:
Watson, L.E.
Object Type:
Report
System:
The UNT Digital Library
The Phase 3---Efficient lighting for US Naval ships
The first two phases of this program developed a lighting system that improved the system efficacy from 46 lm/w to 58 lm/w. In addition, the a power factor of 90% was attained which reduced the supply current by 46% as well as reducing the harmonic content below 3%. This system is being demonstrated on board a ship for final acceptance, and is expected to be employed on newly constructed ships. Phase 3 of this program explores the development of a still more efficient lighting system, in which an efficacy of 80 lm/w is the target. The system is a centralized system in which the 115 volt a.c. is distributed to one or more site on board ship and converted to a d.c. voltage. The d.c. is distributed on to a large group of lamps. At each lamp there will be an oscillator that converts the d.c. to a high frequency a.c. voltage that drives the lamp. This report is an analysis of the rectifying circuit, its efficiency and an estimated cost. 1 fig., 5 tabs.
Date:
January 21, 1988
Creator:
Verderber, R.R.
Object Type:
Report
System:
The UNT Digital Library
Process gas and steam-electric system parameters and advanced reformer concept guidelines for 850/sup 0/C IDC and 950/sup 0/C monolithic HTGR concepts
The following is a description of the endeavors being pursued at ARSD as potential means of directly reducing the reformer plant and/or product costs. Three broad areas are currently under evaluation to achieve the cost reduction objectives and they include: (1) reduced reformer cost by simplifying the design, (2) improving thermochemical performance by enhanced heat transfer and catalyst activity, and (3) modification of process condition assumptions.
Date:
January 21, 1982
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Determination of somatic mutations in human erythrocytes by cytometry
Flow cytometric assays of human erythrocytes labeled with monoclonal antibodies specific for glycophorin A were used to enumerate variant cells that appear in peripheral blood as a result of somatic gene-loss mutations in erythrocyte precursor cells. The assay was performed on erythrocytes from 10 oncology patients who had received at least one treatment from radiation or mutagenic chemotherapy at least 3 weeks before being assayed. The patients were suffering from many different malignancies (e.g., breast, renal, bone, colon and lung), and were treated with several different mutagenic therapeutics (e.g., cisplatinum, adriamycin, daunomycin, or cyclophosphamide). The frequency of these variant cells is an indication of the amount of mutagenic damage accumulated in the individual's erythropoietic cell population. Comparing these results to HPRT clonogenic assays, we find similar baseline frequencies of somatic mutation as well as similar correlation with mutagenic exposures. 9 refs., 3 figs., 1 tab.
Date:
June 21, 1985
Creator:
Jensen, R.H.; Langlois, R.G. & Bigbee, W.L.
Object Type:
Article
System:
The UNT Digital Library
Relaxation of neodymium in a weakly ionized expanding plasma
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 temperature of melt.
Date:
June 21, 1977
Creator:
Chen, H. L.; Bedford, R.; Borzileri, C.; Brunner, W. & Hayes, M.
Object Type:
Article
System:
The UNT Digital Library
Properties of Kel F-800 polymer
Kel F-800 fluorocarbon polymer has been selected as the binder for the TATB explosive in the B77 bomb. Kel F-800 is a 3M copolymer derived from the monomers chlorotrifluorethylene (CTFE) and vinylidine fluoride (VF/sub 2/). To understand and define Kel F-800 in relation to its intended use, as well as to generate guidelines for controlling the WR material, a thorough evaluation of its properties and the expected variations from different production lots was made. The research showed that Kel F-800 varies in both mechanical and thermal properties because of its high Tg (glass transition temperature) and because of its crystallinity. However, no evidence that these variabilities are detrimental to any of the end-use properties of Kel F-800 was found.
Date:
July 21, 1977
Creator:
Cady, W.E. & Caley, L.E.
Object Type:
Report
System:
The UNT Digital Library