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Natural repository analogue program. Progress report, July 1-September 30, 1981

Description: A report on the immobilization of uranium in the earth's crust has been completed. Techniques have been developed to do a comprehensive mass inventory of the Oklo reactor zones. These techniques were applied to a compilation of data from Oklo zones 2 and 3-4. The study shows large deficiencies of neodymium, ruthenium, and mass 99 elements (/sup 99/Tc or /sup 99/Ru) in the reactor zones. The extent of these deficiencies are correlated with the intensity of the nuclear reactions. Analyses of ores… more
Date: March 1, 1982
Creator: Curtis, D.B. (comp.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Multivariate statistical analysis of stream sediments for mineral resources from the Craig NTMS Quadrangle, Colorado

Description: Multivariate statistical analyses were carried out on Hydrogeochemical and Stream Sediment Reconnaissance data from the Craig quadrangle, Colorado, to support the National Uranium Resource Evaluation and to evaluate strategic or other important commercial mineral resources. A few areas for favorable uranium mineralization are suggested for parts of the Wyoming Basin, Park Range, and Gore Range. Six potential source rocks for uranium are postulated based on factor score mapping. Vanadium in stre… more
Date: June 1, 1980
Creator: Beyth, M.; McInteer, C.; Broxton, D. E.; Bolivar, S. L. & Luke, M. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Uranium immobilization and nuclear waste

Description: Considerable information useful in nuclear waste storage can be gained by studying the conditions of uranium ore deposit formation. Further information can be gained by comparing the chemistry of uranium to nuclear fission products and other radionuclides of concern to nuclear waste disposal. Redox state appears to be the most important variable in controlling uranium solubility, especially at near neutral pH, which is characteristic of most ground water. This is probably also true of neptunium… more
Date: February 1, 1982
Creator: Duffy, C.J. & Ogard, A.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Formerly utilized MED/AEC sites remedial action program. Radiological survey of the Middlesex Municipal Landfill, Middlesex, New Jersey. Final report

Description: A radiological survey was conducted at the Middlesex Municipal Landfill in Middlesex, New Jersey. In 1948, dirt contaminated with pitchblende ores was brought to this site from a former ore sampling plant in Middlesex. This survey was conducted in order to characterize the present radiological condition of the site and to determine the extent to which contamination is being transported from the site by natural means such as by drainage. The survey included measurement of (1) radionuclide concen… more
Date: April 1, 1980
Creator: Leggett, R W; Cottrell, W D; Goldsmith, W A; Christian, D J; Haywood, F F; Wagner, E B et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hydrothermal interactions of cesium and strontium phases from spent unreprocessed fuel with basalt phases and basalts

Description: This investigation is a segment of an extensive research program aimed at investigating the feasibility of long-term, subsurface storage of commercial nuclear waste. Specifically, it is anticipated that the waste will be housed in a repository mined from the basalt formations which lie beneath the Hanford Site. The elements monitored during the present experiments were Cs and Sr. These two elements represent significant biohazards if released from a repository and are the major heat producing r… more
Date: March 1, 1980
Creator: Komarneni, S.; Scheetz, B.E.; McCarthy, G.J. & Coons, W.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Summary of the Phase II, Title I engineering assessment of inactive uranium mill tailing, Riverton Site, Riverton, Wyoming

Description: An engineering assessment was performed of the problems resulting from the existence of radioactive uranium mill tailings at the Riverton, Wyoming site. The soil, water and other sample analyses; radiometric measurements to determine areas with radium-contaminated materials; the evaluation of resulting radiation exposures of individuals and nearby populations; the investigation of site geology, hydrology, and meteorology; and the evaluation and costing of alternative corrective actions. Radon g… more
Date: December 1, 1977
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Migration paths for Oklo reactor products and applications to the problem of geological storage of nuclear wastes

Description: Escape of the products from the Oklo reactor proceeds, first, by escape from the uraninite (UO/sub 2/) grains and, second, by transport out of the gangue. Escape from the grain by fission recoil accounts for prompt deposition in the gangue of 5 to 10 percent of the products. Escape by volume diffusion is very slow. The rate of loss by diffusion was highest during the operating period of the reactor and may have been of the order of 10/sup -6/ fraction/a for the most volatile elements. The least… more
Date: January 1, 1977
Creator: Cowan, G.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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New data for aerosols generated by releases of pressurized powders and solutions in static air

Description: Safety assessments and environmental impact statements for nuclear fuel cycle facilities require an estimate of potential airborne releases. Aerosols generated by accidents are being investigated by Pacific Northwest Laboratory to develop radioactive source-term estimation methods. Experiments measuring the mass airborne and particle size distribution of aerosols produced by pressurized releases were run. Carbon dioxide was used to pressurize uranine solutions to 50, 250, and 500 psig before re… more
Date: May 1, 1987
Creator: Ballinger, M. Y.; Sutter, S. L. & Hodgson, W. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radon suppression in storage silos at the United States Department of Energy Feed Material Production Center, Fernald, Ohio

Description: Two silos at the Department of Energy Feed Material Production Facility in Fernald, Ohio, contain an estimated 8800 metric tons of high-grade pitchblende ore residue solids, which contain approximately 3,300 curies (Ci) of radium and 1810 Ci of thorium. These silos are the subject of an on-going CERCLA RI/F Program. Fugitive radon emissions from the silos exceed EPA limits. In addition, structural analyses have revealed that the silos have little credible remaining design life. While pursuing f… more
Date: January 1, 1991
Creator: Land, R.R. (Bechtel National, Inc. (USA)); Biancheria, A. (Westinghouse Materials Co., Fernald, OH (USA)) & Craig, J.R. (USDOE, Washington, DC (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dissolution kinetics of UO sub 2 : Flow-through tests on UO sub 2. 00 pellets and polycrystalline schoepite samples in oxygenated, carbonate/bicarbonate buffer solutions at 25 degree C

Description: The modelling of radionuclide release from waste forms is an important part of the performance assessment of a potential, high-level radioactive waste repository. Since spent fuel consists of UO{sub 2} containing actinide elements and other fission products, it is necessary to determine the principal parameters affecting UO{sub 2} dissolution and quantify their effects on the dissolution rate before any prediction of long term release rates of radionuclides from the spent fuel can be made. As p… more
Date: October 1, 1991
Creator: Nguyen, S. N.; Weed, H. C.; Leider, H. R. & Stout, R. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Engineering assessment of inactive uranium mill tailings, Spook site, Converse County, Wyoming

Description: Ford, Bacon and Davis Utah Inc. has reevaluated the Spook site in order to revise the December 1977 engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings 48 mi northeast of Casper, in Converse County, Wyoming. This engineering assessment has included the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and radiation exposures of individuals and … more
Date: October 1, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Validation of the WATEQ4 geochemical model for uranium

Description: As part of the Geochemical Modeling and Nuclide/Rock/Groundwater Interactions Studies Program, a study was conducted to partially validate the WATEQ4 aqueous speciation-solubility geochemical model for uranium. The solubility controls determined with the WATEQ4 geochemical model were in excellent agreement with those laboratory studies in which the solids schoepite (UO/sub 2/(OH)/sub 2/ . H/sub 2/O), UO/sub 2/(OH)/sub 2/, and rutherfordine ((UO/sub 2/CO/sub 3/) were identified as actual solubil… more
Date: September 1, 1983
Creator: Krupka, K. M.; Jenne, E. A. & Deutsch, W. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Summary of the engineering assessment of inactive uranium mill tailings, Spook Site, Converse County, Wyoming

Description: Ford, Bacon, Davis Utah Inc. has reevaluated the Spook site in order to revise the December 1977 engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings 48 mi northeast of Casper, in Converse County, Wyoming. This engineering assessment has included the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and radiation exposures of individuals and nea… more
Date: October 1, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Engineering assessment of inactive uranium mill tailings, Tuba City site, Tuba City, Arizona

Description: Ford, Bacon and Davis Utah Inc. has reevaluated the Tuba City site in order to revise the March 1977 engineering assessment of the problems resulting from the existence of radioactive uranium mill tailings at Tuba City, Arizona. This engineering assessment has included the preparation of topographic maps, the performance of core drillings and radiometric measurements sufficient to determine areas and volumes of tailings and radiation exposures of individuals and nearby populations, the investig… more
Date: September 1, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Search for an elusive 4. 4-MeV. cap alpha. emitter in uranium minerals

Description: A search for an unidentified 4.4-MeV ..cap alpha..-emitter in Belgian Congo pitchblende and uranium raffinates is described, and a history of observations of 4.4-MeV activity over the last 55 years in radiogenic haloes, zinc ores, monazite, thorite, huttonite, ultrabasic and other abyssal rocks, osmiridium, uranium ores, and raffinates of uranium is given. No evidence of excess 4.4-MeV activity was shown in any of the chemically separated fractions investigated. Upper limits for 4.4-MeV ..cap a… more
Date: December 1, 1979
Creator: Dougan, R. J.; Illige, J. D. & Hulet, E. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Histopathologic, morphometric, and physiologic investigation of lungs of dogs exposed to uranium-ore dust

Description: The most consistent pulmonary-function change attributed to carnotite uranium-ore-dust exposure (at 15 mg/m/sup 3/, for 4 h/day, 5 days/week) is an increased slope of the single-breath N/sub 2/ washout curve, suggesting an uneven distribution of ventilation. This change was observed in dogs exposed for less than 1 year and continued through 4 years of exposure. Measurements of pulmonary resistance, after 27, 40 and 47 months exposure, showed slight age-related changes and increasing differences… more
Date: January 1, 1981
Creator: Cross, F. T.; Filipy, R. E.; Loscutoff, S. M.; Mihalko, P. J.; Palmer, R. F. & Busch, R. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Study of the radon released from open drill holes

Description: The radon emanating from three open drill holes was measured at a site of known uranium mineralization in the Red Desert of south central Wyoming. The radon flux from the soil and drill holes was measured by the accumulator method with activated charcoal cartridges. The surface soil was found to release radon at an average rate of 0.41 atoms/cm/sup 2//sec; the radon emanating from the holes was more variable than that from the soil. The three holes studied released an average of 47 atoms/cm/sup… more
Date: June 1, 1981
Creator: Pacer, J C
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Simulation of effects of redox and precipitation on diffusion of uranium solution species in backfill

Description: This investigation addresses the problem of prediction of the rate of migration of redox-sensitive solution species within packing and backfill materials under conditions of variable oxidation potential. Effects of changes of oxidation potential and precipitation of stable uranium compounds during diffusion of uranium from a region of high oxidation potential into a region of low oxidation potential were simulated numerically. Questions of particular interest addressed in the investigation were… more
Date: December 1, 1987
Creator: Carnahan, C.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pilot study risk assessment for selected problems at the Fernald Environmental Management Project (FEMP)

Description: Two important environmental problems at the USDOE Fernald Environmental Management Project (FEMP) facility in Fernald, Ohio were studied in this human health risk assessment. The problems studied were radon emissions from the K-65 waste silos, and offsite contamination of ground water with uranium. Waste from the processing of pitchblende ore is stored in the K-65 silos at the FEMP. Radium-226 in the waste decays to radon gas which escapes to the outside atmosphere. The concern is for an increa… more
Date: March 1, 1993
Creator: Hamilton, L.D.; Meinhold, A.F.; Baxter, S.L.; Holtzman, S.; Morris, S.C.; Pardi, R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Results of vitrifying Fernald OU-4 wastes

Description: Three silos in Operable Unit 4 (OU-4) at the Feed Materials Production Center in Fernald, Ohio, contain residues from the processing of pitchblende ores. Silos 1 and 2, designated as K-65, contain the depleted ore with a BentoGrout cap over the material to reduce radon emanation, while Silo 3 contains calcined residue from processing solutions. The residues in the three silos contain radium, uranium, uranium daughters, and heavy metals (primarily lead). Vitrification tests were carried out on v… more
Date: February 1, 1993
Creator: Merrill, R.A. (Pacific Northwest Lab., Richland, WA (United States)) & Janke, D.S. (Battelle Memorial Inst., Columbus, OH (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Selective Separation of Trivalent Actinides from Lanthanides by Aqueous Processing with Introduction of Soft Donor Atoms

Description: With increased application of MOX fuels and longer burnup times for conventional fuels, higher concentrations of the transplutonium actinides Am and Cm (and even heavier species like Bk and Cf) will be produced. The half-lives of the Am isotopes are significantly longer than those of the most important long-lived, high specific activity lanthanides or the most common Cm, Bk and Cf isotopes, thus the greatest concern as regards long-term radiotoxicity. With the removal and transmutation of Am is… more
Date: September 23, 2009
Creator: Nash, Kenneth L.; Clark, Sue B. & Lumetta, Gregg
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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CHAPTER 5-RADIOACTIVE WASTE MANAGEMENT

Description: The ore pitchblende was discovered in the 1750's near Joachimstal in what is now the Czech Republic. Used as a colorant in glazes, uranium was identified in 1789 as the active ingredient by chemist Martin Klaproth. In 1896, French physicist Henri Becquerel studied uranium minerals as part of his investigations into the phenomenon of fluorescence. He discovered a strange energy emanating from the material which he dubbed 'rayons uranique.' Unable to explain the origins of this energy, he set the… more
Date: May 5, 2010
Creator: Marra, J.
Item Type: Refine your search to only Book
Partner: UNT Libraries Government Documents Department
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