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Effects of impurities on PuO/sub 2/ dissolution in nitric-hydrofluoric acid solutions

Description: The effects of 0.10 M Cu/sup 2 +/, Hg/sup 2 +/, Zn/sup 2 +/, La/sup 3 +/, Ce/sup 3 +/, Al/sup 3 +/, Th/sup 4 +/,Zr/sup 4 +/, Cr/sup 3 +/, and Fe/sup 3 +/ on PuO/sub 2/ dissolution in 8.0M HNO/sub 3/--0.1M HF were investigated. Except for Cr/sup 3 +/ and Fe/sup 3 +/, the amount of Pu dissolved in 1 hour can be predicted by either log C(Pu) = -0.32 log K/sub F/ - 1.53 (K/sub F/ = first stability constant for the impurity metal fluoride complex) or log C(Pu) = -0.5 Z/sup 2//d-1.11 (Z = ionic charg… more
Date: January 1, 1976
Creator: Tallent, O. K. & Mailen, J. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effect of substrate-twin-induced microstructure on transport properties of epitaxial Tl sub 2 Ba sub 2 CaCu sub 2 O sub x films in a magnetic field

Description: The role of substrate-induced microstructure on transport properties in c-axis oriented epitaxial Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub x} films grown on LaAlO{sub 3} and SrTiO{sub 3} has been studied. For a magnetic field parallel to the Cu-0 planes, resistivity and the critical current density, J{sub c}, have been measured as a function of angle {theta} between the applied field and the direction of transport current. Resistivity dips and enhancement of the critical current density, J{sub c}, we… more
Date: August 1, 1992
Creator: Kim, D. H.; Miller, D. J.; Hettinger, J. D.; Gray, K. E.; Landis, P. G.; Sharping, J. E. (Argonne National Lab., IL (United States)) et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Molecular mechanisms of the epithelial transport of toxic metal ions, particularly mercury, cadmium, lead, arsenic, zinc and copper. Progress report, January 1, 1980-December 31, 1980

Description: Investigations were continued to elucidate the mode of transepithelial transport of toxic metal ions across the gastrointestinal tract, as well as their interactions with biological processes and other metal ions. All experimental details that are either published, submitted for publication or in press during this report period are included in the Appendix. Primary attention for this report has been given to the intestinal absorption of lead and its interaction with other biological moieties.
Date: January 1, 1980
Creator: Wasserman, R H
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Gas chromatographic separation of hydrogen isotopes using metal hydrides

Description: A study was made of the properties of metal hydrides which may be suitable for use in chromatographic separation of hydrogen isotopes. Sixty-five alloys were measured, with the best having a hydrogen-deuterium separation factor of 1.35 at 60/sup 0/C. Chromatographic columns using these alloys produced deuterium enrichments of up to 3.6 in a single pass, using natural abundance hydrogen as starting material. 25 references, 16 figures, 4 tables.
Date: May 9, 1984
Creator: Aldridge, Frederick T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The role of compound nuclei and deep-inelastic scattering in complex fragment production at intermediate energies

Description: The dependence of complex fragment production on the asymmetry of the entrance channel has been investigated with the 18 A MeV /sup 139/La + /sup 12/C, /sup 27/Al, /sup 64/Ni reactions. Invariant cross section plots show a very simple pattern for the two lighter targets and a more complex one for the heavier /sup 64/Ni target. The observed complex fragments are shown to result from quasi-elastic/deep-inelastic reactions and from compound nuclei formed in complete/incomplete fusion processes. 9 … more
Date: February 1, 1989
Creator: Wozniak, G. J.; Colonna, N.; Charity, R. J. & Moretto, L. G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Complex fragment emission at low and high excitation energy

Description: Complex fragment emission has been certified as a compound nucleus process at low energies. An extension of the measurements to heavy ion reactions up to 50 MeV/u shows that most complex fragments are emitted by highly excited compound nuclei formed in incomplete fusion reactions. 12 refs., 26 figs.
Date: August 1, 1986
Creator: Moretto, Luciano G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Results of tests and studies of American materials in the channel of the MHD facility U-02 (Phase III). [LaCrO/sub 3/]

Description: In accordance with the US--USSR Cooperative Program in MHD joint US--USSR tests were conducted in May 1978 at the U-02 facility of an MHD generator section consisting of U.S.-built electrode blocks and USSR-built insulating walls. The main purpose of the experiment was to conduct continuous 100-hour duration tests of materials and structures of electrode blocks; in particular, to study the behavior of ceramic electrodes and insulators in operating conditions of an MHD generator, the electro-phy… more
Date: October 1, 1978
Creator: Burenkov, D. K.; Borodina, T. I.; Vysotsky, D. A.; Zalkind, V. I.; Kirillov, V. V.; Romanov, A. I. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Equilibrium and non-equilibrium emission of complex fragments

Description: Complex fragment emission (Z{gt}2) has been studied in the reactions of 50, 80, and 100 MeV/u {sup 139}La + {sup 12}C, and 80 MeV/u {sup 139}La + {sup 27}Al, {sup nat}Cu, and {sup 197}Au. Charge, angle, and energy distributions were measured inclusively and in coincidence with other complex fragments, and were used to extract the source rapidities, velocity distributions, and cross sections. The experimental emission velocity distributions, charge loss distributions, and cross sections have bee… more
Date: August 1, 1989
Creator: Bowman, D. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Disposal of tritium-exposed metal hydrides

Description: A plan has been established for disposal of tritium-exposed metal hydrides used in Savannah River Site (SRS) tritium production or Materials Test Facility (MTF) R D operations. The recommended plan assumes that the first tritium-exposed metal hydrides will be disposed of after startup of the Solid Waste Disposal Facility (SWDF) Expansion Project in 1992, and thus the plan is consistent with the new disposal requiremkents that will be in effect for the SWDF Expansion Project. Process beds contai… more
Date: January 1, 1991
Creator: Nobile, A. & Motyka, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The effect of helium from tritium decay on the gas-solid equilibrium constant for La-Ni-Al tritides

Description: Change in the equilibrium vapor pressure over LaNi/sub 4.25/ Al/sub 0.75/ tritide with helium in-growth has been observed for helium concentrations up to 10,000 appm. The change is a decrease in pressure from about 500 torr to 90 torr at 80/degree/C. This decrease is believed to be associated with a crystal lattice expansion due to helium, and is similar to the plateau pressure decrease as function of aluminum concentration for the family of LaNi/sub 5-x/Al/sub x/ alloys with O < x < 1. Subsequ… more
Date: January 1, 1988
Creator: Walters, R.T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Source of high activity levels recently observed from shipping containers and transfer cans

Description: Shipping cans containing product from plant runs completed in the latter half of April and in May showed, in general, definitely higher levels of radiation than had been observed previously. Likewise, containers for the transfer of the F-10-P solution from the 224 Bldg. to 231 Bldg. (during May) exhibited higher radiation levels than could be attributed to higher power levels and increased batch sizes. These higher radiation levels were indicative that some radioactive element (or elements) was… more
Date: July 5, 1945
Creator: Swartout, J.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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National uranium resource evaluation program: hydrogeochemical and stream sediment reconnaissance basic data for Sacramento quadrangle, California

Description: Field and laboratory data are presented for 1890 sediment samples from the Sacramento Quadrangle, California. The samples were collected by Savannah River Laboratory; laboratory analysis and data reporting were performed by the Uranium Resource Evaluation Project at Oak Ridge, Tennessee.
Date: October 15, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Environmental monitoring at Ames Laboratory: calendar year 1980

Description: The results and conclusions from the Ames Laboratory environmental monitoring programs for the Ames Laboratory Research Reactor (ALRR) and other Laboratory facilities are presented. The major areas of radiological monitoring were ALRR effluent air, environmental air, effluent water and environmental water. A summary of the radioactivity found in the environment is presented. The ALRR ceased operation on December 1, 1977. Decommissioning activities began January 3, 1978, and are scheduled for co… more
Date: April 1, 1981
Creator: Voss, Milo D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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National uranium resource evaluation program: hydrogeochemical and stream sediment reconnaissance basic data for Ely quadrangle, Nevada; Utah

Description: Field and laboratory data are presented for 1937 sediment samples from the Ely Quadrangle, Nevada; Utah. The samples were collected by Savannah River Laboratory; laboratory analysis and data reporting were performed by the Uranium Resource Evaluation Project at Oak Ridge, Tennessee.
Date: October 15, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Inductively coupled plasma-atomic emission spectrometry (ICP-AES) in support of nuclear waste management. [HHDECMP (hexyl hexyl-N,N diethylcarbamolymethylphosphonate) and n-octyl(phenyl)-N,N diisobutylcarbamoylmethylphosphine oxide]

Description: Simulated complex nuclear waste solutions are characterized by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AEC). The system uses and ICP source focused on both a polychromator and a computer-controlled scanning monochromator for intensity measurements. This instrumentation allows for simultaneous and sequential measurements of liquid extraction distribution coefficients needed in the development of process flow sheets for component separations. A large number of elements are de… more
Date: January 1, 1984
Creator: Huff, E.A. & Horwitz, E.P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Little Rock and El Dorado 1/sup 0/ x 2/sup 0/ NTMS quadrangles and adjacent areas, Arkansas: data report (abbreviated)

Description: This abbreviated data report presents results of ground water and stream sediment reconnaissance in the National Topographic Map Series Little Rock 1/sup 0/ x 2/sup 0/ quadrangle (Cleveland, Dallas, and Howard Counties do not have stream sediment analyses); the El Dorado 1/sup 0/ x 2/sup 0/ quadrangle (only Clark County has stream sediment analyses); the western part (Lonoke and Jefferson Counties) of Helena 1/sup 0/ x 2/sup 0/ quadrangle; the southern part (Franklin, Logan, Yell, Perry, Faulkn… more
Date: July 1, 1981
Creator: Steel, K. F. & Cook, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hydrogeochemical and stream sediment reconnaissance basic data for Las Cruces quadrangle, New Mexico

Description: Field and laboratory data are presented for 501 water samples and 1817 sediment samples from the Las Cruces Quadrangle, New Mexico. The samples were collected and uranium analysis performed by Los Alamos National Laboratory; multielement analysis and data reporting were performed by the Uranium Resource Evaluation Project at Oak Ridge, Tennessee.
Date: August 31, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Three recent TDHF calculations

Description: Three applications of TDHF are discussed. First, vibrational spectra of a post grazing collision /sup 40/Ca nucleus is examined and found to contain many high energy components, qualitatively consistent with recent Orsay experiments. Second, the fusion cross section in energy and angular momentum are calculated for /sup 16/O + /sup 24/Mg to exhibit the parameters of the low l window for this system. A sensitivity of the fusion cross section to the effective two body potential is discussed. Last… more
Date: May 1, 1981
Creator: Weiss, M.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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National uranium resource evaluation program: hydrogeochemical and stream sediment reconnaissance basic data for Fresno quadrangle, California

Description: Field and laboratory data are presented for 1038 sediment samples from the Fresno Quadrangle, California. The samples were collected by Savannah River Laboratory; laboratory analysis and data reporting were perfomed by the Uranium Resource Evaluation Project at Oak Ridge, Tennessee.
Date: October 15, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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