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Use of time averaged precipitation for wet removal in a regional air pollution assessment model

Description: Results are presented of the test of a regional scale assessment model using four modes of precipitation hourly, 6 hourly, average turned on and off with the natural frequency and average precipitation. The test cases were carried out for a release of SO/sub 2/ with transformation to SO/sub 4/ at three different sites in the United States for July 1974. The results indicated that the use of average precipitation turned on and off with the natural frequency could be used instead of hourly precip… more
Date: September 1, 1979
Creator: Davis, W. E. & Eadie, W. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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HOMOGENEOUS REACTOR PROGRAM PROGRESS REPORT FOR PERIOD FROM DECEMBER 1, 1960 TO MAY 31, 1961

Description: Homogoenous Reactor Test. Four HRT runs were performed to study the reactor behavior with downward core flow. The upper patch was found to have fallen out, resulting in an increase in core-to-blanket mixing. The reactor will not be operated again. In the HRT processing plant, the development of a process for removing Ni and other soluble contaminants from fuel solutions by peroxide precipitation was continued, and efficiency tests of stackfllter iodine traps were performed. Power-trace data and… more
Date: September 1, 1961
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Precipitation of Kr after implantation into Al

Description: Transmission electron microscopy (TEM) was used to perform a systematic study of the microstructural evolution in Al as a function of the fluence received during 65 keV Kr/sup +/ ion implantation at room temperature. At the lower fluences (2 x 10/sup 16/ to 2 x 10/sup 19/ Kr/sup +/m/sup -2/), isolated dislocation loops and the evolution of a dislocation network was observed by TEM. Above fluences of 10/sup 19/ Kr/sup +/m/sup -2/, the microstructure is dominated by a high density of Kr bubbles w… more
Date: September 1, 1985
Creator: Birtcher, R. C. & Jaeger, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SOME METHODS OF PREPARING TETRAVALENT URANIUM SOLUTIONS

Description: A number of processes for the preparation of tetravalent uranium solutions, suitable for use as a reductant for plutonium in the partition cycle of solvent extraction processing of irradiated reactor fuels, were investigated. The most attractive process consists of the precipitation of uranyl sulfide by addition of l.4 M uranyl nitrate to about a 50% excess of 2.5% ammonium sulfide, digestion of the precipitate in the supernate at 40 deg C for about 90 minutes to decompose uranyl sulfide to UO/… more
Date: September 1, 1961
Creator: Katz, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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State-of-the-art report on low-level radioactive waste treatment

Description: An attempt is made to identify the main sources of low-level radioactive wastes that are generated in the United States. To place the waste problem in perspective, rough estimates are given of the annual amounts of each generic type of waste that is generated. Most of the wet solid wastes arise from the cleanup of gaseous and liquid radioactive streams prior to discharge or recycle. The treatment of the process streams and the secondary wet solid wastes thus generated is described for each type… more
Date: September 1, 1980
Creator: Kibbey, A. H. & Godbee, H. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Rainout assessment: the ACRA system and summaries of simulation results. [Computer systems to estimate threats from precipitation scavenging of radioactive debris clouds from nuclear weapons]

Description: A generalized, three-dimensional, integrated computer code system was developed to estimate collateral-damage threats from precipitation-scavenging (rainout) of airborne debris-clouds from defensive tactical nuclear engagements. This code system, called ACRA for Atmospheric-Contaminant Rainout Assessment, is based on Monte Carlo statistical simulation methods that allow realistic, unbiased simulations of probabilistic storm, wind, and precipitation fields that determine actual magnitudes and pr… more
Date: September 1, 1977
Creator: Watson, C. W.; Barr, S. & Allenson, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Numerical modeling of self-limiting and self-enhancing caprock alteration induced by CO2 storage in a depleted gas reservoir

Description: This paper presents numerical simulations of reactive transport which may be induced in the caprock of an on-shore depleted gas reservoir by the geological sequestration of carbon dioxide. The objective is to verify that CO{sub 2} geological disposal activities currently being planned for the study area are safe and do not induce any undesired environmental impact. In our model, fluid flow and mineral alteration are induced in the caprock by penetration of high CO{sub 2} concentrations from the… more
Date: September 7, 2007
Creator: Xu, Tianfu; Gherardi, Fabrizio; Xu, Tianfu & Pruess, Karsten
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Chapter 3: Evaluating the impacts of carbonaceous aerosols on clouds and climate

Description: Any attempt to reconcile observed surface temperature changes within the last 150 years to changes simulated by climate models that include various atmospheric forcings is sensitive to the changes attributed to aerosols and aerosol-cloud-climate interactions, which are the main contributors that may well balance the positive forcings associated with greenhouse gases, absorbing aerosols, ozone related changes, etc. These aerosol effects on climate, from various modeling studies discussed in Meno… more
Date: September 3, 2007
Creator: Menon, Surabi & Del Genio, Anthony D.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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Errata Sheet for Post-Closure Inspection and Monitoring Report for Corrective Action Unit 110: Area 3 WMD U-3ax/bl Crater, Nevada Test Site, Nevada

Description: The last sentence of the second paragraph of the Executive Summary on page ix incorrectly states the period for repair. Cracks or areas of settling exceeding the 15 centimeters (6 inches) deep that extend 1.0 meter (3 feet) or more on the cover will be evaluated and repaired within 60 days of detection. The second sentence of the third paragraph of the Executive Summary on page ix incorrectly states the month that cover repair was performed while omitting the discovery of additional settling, w… more
Date: September 13, 2007
Creator: National Security Technologies, LLC
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Interannual Variability in Global Soil Respiration on a 0.5 Degree Grid Cell Basis (1980-1994)

Description: We used a climate-driven regression model to develop spatially resolved estimates of soil-CO{sub 2} emissions from the terrestrial land surface for each month from January 1980 to December 1994, to evaluate the effects of interannual variations in climate on global soil-to-atmosphere CO{sub 2} fluxes. The mean annual global soil-CO{sub 2} flux over this 15-y period was estimated to be 80.4 (range 79.3-81.8) Pg C. Monthly variations in global soil-CO{sub 2} emissions followed closely the mean te… more
Date: September 15, 2003
Creator: Raich, J.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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THE EFFECT OF INTERSTITIAL N ON GRAIN BOUNDARY COHESIVE STRENGTH IN Fe

Description: Increased nitrogen levels have been correlated with decreased ductility and elevated ductile-to-brittle transition temperature in pressure vessel steels [1]. However, the exact role played by nitrogen in the embrittlement of steels remains unclear. Miller and Burke have reported atom probe ion microscopy findings from neutron-irradiated low-alloy pressure vessel steel showing the presence of a 1 to 2 ruonolayer thick film of Mo, N, and C at prior austenitic grain boundaries (GB's) [2], suggesti… more
Date: September 22, 2003
Creator: Miyoung, Kim; Gellar, Clint B. & Freeman, A. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Numerical modeling of injection and mineral trapping of CO2 withH2S and SO2 in a Sandstone Formation

Description: Carbon dioxide (CO{sub 2}) injection into deep geologic formations could decrease the atmospheric accumulation of this gas from anthropogenic sources. Furthermore, by co-injecting H{sub 2}S or SO{sub 2}, the products respectively of coal gasification or combustion, with captured CO{sub 2}, problems associated with surface disposal would be mitigated. We developed models that simulate the co-injection of H{sub 2}S or SO{sub 2} with CO{sub 2} into an arkose formation at a depth of about 2 km and … more
Date: September 7, 2004
Creator: Xu, Tianfu; Apps, John A.; Pruess, Karsten & Yamamoto, Hajime
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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PLUVIUS: a generalized one-dimensional model of reactive pollutant behavior, including dry deposition, precipitation formation, and wet removal

Description: The program is subdivided into basic modules, whose coordination within the code is presented in flow-chart form. Input and output variables are given in consistent units, and the program listings are documented at critical points. In addition, two example code executions are described, along with corresponding input and representative output. As a first step in code application the user should execute these examples on his own machine. Progressive modifications from these base cases will lead … more
Date: September 1, 1981
Creator: Hales, J.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Synthesis and Characterization of Oxide Feedstock Powders for the Fuel Cycle R&D Program

Description: Nuclear fuel feedstock properties, such as physical, chemical, and isotopic characteristics, have a significant impact on the fuel fabrication process and, by extension, the in-reactor fuel performance. This has been demonstrated through studies with UO{sub 2} spanning greater than 50 years. The Fuel Cycle R&D Program with The Department of Energy Office of Nuclear Energy has initiated an effort to develop a better understanding of the relationships between oxide feedstock, fresh fuel prope… more
Date: September 1, 2010
Creator: Voit, Stewart L.; Vedder, Raymond James & Johnson, Jared A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Castle Creek known geothermal resource area: an environmental analysis

Description: The Castle Creek known geothermal resource area (KGRA) is part of the large Bruneau-Grand View thermal anomaly in southwestern Idaho. The KGRA is located in the driest area of Idaho and annual precipitation averages 230 mm. The potential of subsidence and slope failure is high in sediments of the Glenns Ferry Formation and Idaho Group found in the KGRA. A major concern is the potential impact of geothermal development on the Snake River Birds of Prey Natural Area which overlaps the KGRA. Any si… more
Date: September 1, 1979
Creator: Spencer, S. G. & Russell, B. F. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Separation of Am-Cm from NaNO/sub 3/ waste solutions by in-canyon-tank precipitation as oxalates

Description: A process for the purification of Am-Cm residues was developed specifically for application in Savannah River Plant (SRP) canyon tanks. These Am-Cm residues were collected from several campaigns to produce plutonium containing high isotopic concentrations of /sup 240/Pu. An initial purification from Al/sup 3 +/ had already been accomplished by a solvent extraction process. The product of this process was contaminated with NaNO/sub 3/ as a result of entrainment of the solvent extraction NaNO/sub… more
Date: September 1, 1981
Creator: Gray, L. W.; Burney, G. A.; Wilson, T. W. & McKibben, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The effect of precipitation on contaminant dissolution and transport: Analytic solutions

Description: We analysed the effect of precipitation on the dissolution and transport rates of a nondecaying contaminant. Precipitation near the waste surface can have a profound effect on dissolution and transport rates. The mass-transfer rate at the waste surface is controlled by the solid-liquid reaction rate to an extent determined by the modified reaction-rate modulus, ..cap alpha... At later times extending to steady state, the mass-transfer rate depends on the location of the precipitation front r/su… more
Date: September 1, 1988
Creator: Light, W. B.; Chambre, P. L.; Pigford, T. H. & Lee, W. W. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Long-term aging of cast stainless steels: Mechanisms and resulting properties

Description: Mechanical property data are presented from Charpy-impact, tensile, and J-R curve tests for several heats of cast stainless steel aged up to 10,000 h at 450, 400, 350, 320, and 290/sup 0/C. The results indicate that thermal aging increases the tensile strength and decreases the impactenergy, J/sub IC/ and tearing modulus of the steels. Also, the ductile-to-brittle transition curve shifts to higher temperatures. The low-carbon CF-3 steels were the most resistant and the molybdenum-containing hig… more
Date: September 1, 1987
Creator: Chopra, O. K. & Chung, H. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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/sup 238/Pu fuel processes. Quarterly report, January-March 1981

Description: Recent process development work indicates that the atmosphere (cover gas) in which /sup 238/PuO/sub 2/ granules are sintered is a critical parameter in the production of General-Purpose Heat Source (GPHS) fuel forms. An acceptable feed material for the direct fabrication of /sup 238/PuO/sub 2/ fuel was produced in the SRP HB-Line using a Pu(III) oxalate direct-strike precipitation technique that was developed at SRL.
Date: September 1, 1981
Creator: Folger, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Geothermal injection treatment: process chemistry, field experiences, and design options

Description: The successful development of geothermal reservoirs to generate electric power will require the injection disposal of approximately 700,000 gal/h (2.6 x 10/sup 6/ 1/h) of heat-depleted brine for every 50,000 kW of generating capacity. To maintain injectability, the spent brine must be compatible with the receiving formation. The factors that influence this brine/formation compatibility and tests to quantify them are discussed in this report. Some form of treatment will be necessary prior to inj… more
Date: September 1, 1984
Creator: Kindle, C. H.; Mercer, B. W.; Elmore, R. P.; Blair, S. C. & Myers, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A15 superconductors through direct solid-state precipitation: V/sub 3/Ga and Nb/sub 3/Al

Description: A solid-state precipitation process was used to prepare superconducting tapes containing an A15 phase, V/sub 3/Ga or Nb/sub 3/Al, in a ductile niobium or vanadium containing BCC matrix. Ingots weighing as large as 30 to 50 gms of V-(14 approx. 19 at. %) Ga and Nb-(13 approx. 22 at. %) Al were prepared by arc-melting, homogenized, quenched, warm-rolled over 99% into tape, and aged at temperatures in the range 600/sup 0/C to 1000/sup 0/C to precipitate the superconducting A15 phase. The features … more
Date: September 1, 1980
Creator: Hong, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Assessment of concentration mechanisms for organic wastes in underground storage tanks at Hanford

Description: Pacific Northwest Laboratory (PNL) has conducted an initial conservative evaluation of physical and chemical processes that could lead to significant localized concentrations of organic waste constituents in the Hanford underground storage tanks (USTs). This evaluation was part of ongoing studies at Hanford to assess potential safety risks associated with USTs containing organics. Organics in the tanks could pose a potential problem if localized concentrations are high enough to propagate combu… more
Date: September 1, 1992
Creator: Gerber, M. A.; Burger, L. L.; Nelson, D. A.; Ryan, J. L. (Pacific Northwest Lab., Richland, WA (United States)) & Zollars, R. L. (Washington State Univ., Pullman, WA (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Plastic deformation in oxide ceramics. Progress report, January 1-December 31, 1980

Description: Effects of O/U ratio on UO/sub 2/ single crystals oriented either to suppress or promote )100) < 110 > slip are described. For both orientations, a change from crystallographic to noncrystallographic slip is observed with composition and temperature and correlated with the presence of Willis defects. Research on the kinetics and mechanism of formation of crystallographic shear (CS) planes in reduced rutile (TiO/sub 2-x/) is also described. Two orientations of CS planes, )132) and )121), are pre… more
Date: September 1, 1980
Creator: Heuer, A. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Remediation of TRU-contaminated soil by aqueous phase leaching and coprecipitation

Description: Chemical leaching studies were carried out on transuranic (TRU) waste contaminated ([approx]882 pCi/gm) soil samples that were collected near the 903 Pad at the Rocky Flats Plant, colorado. The studies for this report were conducted in the research facilities of the Department of Metallurgical and Material Engineering, Colorado School of Mines.
Date: September 1992
Creator: Lee, Jae-Ho; Martins, G. P. & Weidner, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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