Search for dissertations about: "U Jonsson"

Showing result 6 - 10 of 15 swedish dissertations containing the words U Jonsson.

  2. 6. Topics in analytic theory of partial differential equations

    Author : Sergei Chulkov; Jan-Erik Björk; Mattias Jonsson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; partial differential equations; Algebra; geometry and mathematical analysis; Algebra; geometri och analys;

    Abstract : The thesis consists of three papers I, II III devoted to some topics in analytic theory of partial differential equations. The main paper is II. In this paper we study a version of the classical problem on the convergence of formal solutions of systems of partial differential equations. READ MORE

  4. 7. Stability of UO2 in systems containing radiolytic oxidants : The role of uranyl peroxide species

    Author : Junyi Li; Mats Jonsson; Peter Burns; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; UO2; studtite; XPS; radiolysis; UO2; studtit; XPS; radiolys; Kemi; Chemistry;

    Abstract : Nuclear power constitutes a major pillar on the global energy market, and it will most probably increase in importance as fossil fuels are gradually phased out. The main problem connected to nuclear power is the generation of highly radiotoxic spent nuclear fuel (95% UO2 and 5% radioactive fission products and heavier actinides). READ MORE

  5. 8. The effect of solid state inclusions on the reactivity of UO2 : A kinetic and mechanistic study

    Author : Martin Trummer; Mats Jonsson; Lara Duro; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nuclear chemistry; Kärnkemi;

    Abstract : The release of radionuclides is a key process in the safety assessment of a deep geological repository for spent nuclear fuel. A large fraction of the release is assumed to be a consequence of dissolution of the fuel matrix, UO2. In this doctoral thesis, the kinetics and the mechanisms behind oxidative U(IV) dissolution were studied. READ MORE

  6. 9. Influence of metallic fission products and self irradiation on the rate of spent nuclear fuel-matrix dissolution

    Author : Sara Nilsson; Mats Jonsson; István Furó; Göran Lindbergh; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nuclear chemistry; Kärnkemi;

    Abstract : Denna licentiatavhandling behandlar effekten av två inneboende egenskaper (fissions produkter och egenbestrålning) hos utbränt kärnbränsle på hastigheten för strålningsinducerad upplösning av bränslematris (UO2). I ett framtida djupförvar kommer det utbrända kärnbränslet att deponeras 500 meter ner i berggrunden i en reducerande miljö. READ MORE

  7. 10. Physical and Chemical Aspects of Radiation Induced Oxidative Dissolution of UO2

    Author : Olivia Roth; Mats Jonsson; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; UO2; spent nuclear fuel; dissolution; oxidation; radiolysis; irradiation; particle size; modeling; Chemistry; Kemi;

    Abstract : Denna licensiatavhandling behandlar oxidativ upplösning av UO2. Upplösning av UO2 studeras huvudsakligen då UO2-matrisen hos använt kärnbränsle förväntas fungera som en barriär mot frigörande av radionuklider i ett framtida djupförvar. READ MORE