Sökning: "actinide Be"

Visar resultat 6 - 10 av 29 avhandlingar innehållade orden actinide Be.

  1. 6. Phenyl Trifluoromethyl Sulfone as Diluent in a Grouped ActiNide EXtraction Process

    Författare :Jenny Halleröd; Chalmers tekniska högskola; []
    Nyckelord :Solvent Extraction; FS-13; CyMe4-BTBP and TBP; GANEX;

    Sammanfattning : The demand for electricity and electrical energy is very high both in Sweden and in the other industrialised countries in the world. An upgrade of the nuclear power plants, including recycling of the used nuclear fuel, would make nuclear power a sustainable energy option. Over the years different types of nuclear reactors have been developed. LÄS MER

  3. 7. Uncertainties in Actinide Solubility Calculations Illustrated using the Th-OH-PO4 System

    Författare :Christian Ekberg; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; potentiometric titrations; solvent extraction; uncertainty analysis; sensitivity analysis; MINVAR; thorium hydrolysis; SENVAR; thorium phosphate complexes; UNCCON;

    Sammanfattning : Computer simulations have become increasingly popular in many different areas over the years, owing mainly to more effective and cheaper machines. In many cases, the trend seems to be that computer simulations are replacing experiments, at least in areas in which experiments are very difficult (expensive) or impossible. LÄS MER

  4. 8. Traitement de l'interaction spin-orbite en chimie quantique et application à la réactivité des complexes d'actinides

    Författare :Emmanuel Fromager; Ulf Wahlgren; Christian Teichteil; Michael Dolg; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quantum chemistry; actinides; charge transfer reactions; spin-orbit effects; Physics; Fysik;

    Sammanfattning : The recent methodological developments and the advent of faster computers enable nowadays to investigate theoretically the chemical reactivity of heavy element complexes. As an example we can mention actinide chemistry which is involved in the separation of nuclear wastes. LÄS MER

  5. 9. Development of a Solvent Extraction Process for Group Actinide Recovery from Used Nuclear Fuel

    Författare :Emma Aneheim; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Partitioning; Solvent Extraction; Fission Products; TBP; BTBP; GANEX;

    Sammanfattning : When uranium is used as fuel in nuclear reactors it both undergoes neutron induced fission as well as neutron capture. Through successive neutron capture and beta decay transuranic elements such as neptunium, plutonium, americium and curium are produced in substantial amounts. LÄS MER

  7. 10. Rapid analysis of actinide isotopes using quadrupole ICP-MS for emergency preparedness and environmental monitoring

    Författare :Christina Greis; Stefan Karlsson; Bert Allard; Anders Düker; Håkan Pettersson; Gi-Hoon Hong; Örebro universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; quadrupole ICP-MS; actinides; plutonium; preparedness; NATURAL SCIENCES; NATURVETENSKAP; Chemistry; Kemi; Environmental chemistry; Miljökemi; Enviromental Science; Miljövetenskap;

    Sammanfattning : Transuranium elements in the environment are mainly derived from nuclear weapons testing and the nuclear fuel cycle. Of growing concern are illicit nuclear trafficking and the threat of terror acts. LÄS MER