Search for dissertations about: "gamma radiolysis"

Showing result 1 - 5 of 7 swedish dissertations containing the words gamma radiolysis.

  2. 1. Radiation induced corrosion of copper

    Author : Åsa Björkbacka; Mats Jonsson; Christofer Leygraf; Mehran Mostafavi; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Corrosion; oxidation; copper; copper oxide; gamma radiation; radiolysis; hydrogen peroxide; hydroxyl radical; Kemi; Chemistry;

    Abstract : The process of radiation induced corrosion of copper is not well understood. The most obvious situation where the knowledge of this process is crucial is in a deep repository for high level spent nuclear fuel where the fuel will be sealed inside copper canisters. READ MORE

  4. 2. Experimental studies of radiation-induced dissolution of UO2 : The effect of intrinsic solid phase properties and external factors

    Author : Alexandre Barreiro Fidalgo; Mats Jonsson; David Shoesmith; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Oxidation; dissolution; uranium dioxide; gadolinium; bentonite; sulfide; hydrogen; gamma radiation; radiolysis; hydrogen peroxide; hydroxyl radical; repository; Kemi; Chemistry;

    Abstract : Dissolution of the UO2 matrix is one of the potential routes for radionuclide release in a future deep geological repository for spent nuclear fuel. This doctoral thesis focuses on interfacial reactions of relevance in radiation-induced dissolution of UO2 and is divided in two parts:In the first part, we sought to explore the effects of solid phase composition:The impact of surface stoichiometry on the reactivity of UO2 towards aqueous radiolytic oxidants was studied. READ MORE

  5. 3. Transport and Containment Chemistry of Ruthenium under Severe Accident Conditions in a Nuclear Power Plant

    Author : Ivan Kajan; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; fission products; radiolysis; nuclear accident; containment; ruthenium tetroxide; ruthenium;

    Abstract : During a severe nuclear accident volatile elements and elements readily forming volatile compounds are the main concern regarding the release of radioactive material to the environment. As ruthenium is prone to form volatile oxides under severe nuclear accident conditions as well as having radiotoxic isotopes, it is one of the more important elements during such an accident. READ MORE

  6. 4. Radiation Induced Oxidative Dissolution of UO2

    Author : Ella Ekeroth; Mats Jonsson; Bernd Grambow; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; radiation; radiolysis; UO2; spent nuclear fuel; radicals; oxidants; reductants; rate constants; dissolution; H2O2; H2; Nuclear chemistry; Kärnkemi;

    Abstract : Sammanfattning Denna doktorsavhandling berör oxidativ upplösning av UO2 (som modellsubstans för utbränt kärnbränsle) orsakad av radiolys av vatten samt effekten av H2 på denna denna process. Hastighetskonstanter för oxidation av UO2-pulver med olika oxidanter såsom H2O2 har bestämts experimentellt. READ MORE

  7. 5. Stability of Alternative Nuclear Fuel Materials in Aqueous Systems

    Author : Sawsan El Jamal; Mats Jonsson; Mats Johnsson; Claire Corkhill; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; UC; UN; UO2; gamma radiolysis; oxidative dissolution; H2O2; studtite; additive; UC; UN; UO2; gammaradiolys; oxidativ upplösning; H2O2; studtite; additiv; Kemi; Chemistry;

    Abstract : Nuclear power produces a large portion of the electricity worldwide. It has been the largest low-carbon energy source for more than 30 years and has played an essential role in the security of energy supplies for many countries. READ MORE