Sökning: "α-radiolysis"

Hittade 5 avhandlingar innehållade ordet α-radiolysis.

  1. 1. Oxidative dissolution of UO2 by α-radiolysis

    Författare :Niklas Hansson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; hydrogen effect; kinetics; MOX; α-radiolysis; dose rate; UO2; ε-particles;

    Sammanfattning : To prevent the spread of radiotoxic nuclides in the environment, spent nuclear fuel generated by decades of nuclear power operation must be safely stored for at least 100 000 years. The KBS-3 method is a highly developed deep geological repository concept and is the first final repository design for high-level nuclear waste to be constructed. LÄS MER

  3. 2. The interaction of dissolved hydrogen with α-radiolytic oxidants during nuclear fuel dissolution

    Författare :Lovisa Bauhn; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; α-radiolysis; MOX; hydrogen effect; bromide; gas mass spectrometry; SIMFUEL;

    Sammanfattning : Used nuclear fuel contains radiotoxic elements that will need to be kept isolated from the biosphere over a time period of 100 000 years. The KBS-3 geological storage concept aims to prevent the migration of radionuclides into the environment by different engineered barriers. LÄS MER

  4. 3. Homogeneous radiolysis studies using 238Pu

    Författare :Lovisa Bauhn; Chalmers tekniska högskola; []
    Nyckelord :gas mass spectrometry; alpha-radiolysis; plutonium oxidation;

    Sammanfattning : Used nuclear fuel contains radiotoxic elements with lifetimes in the range of 100 000 years. Although possibilities for recycling of the fuel exist, a final storage for the ultimate high-level waste will be necessary. LÄS MER

  5. 4. Redox Chemistry in Radiation Induced Dissolution of Spent Nuclear Fuel : from Elementary Reactions to Predictive Modeling

    Författare :Olivia Roth; Mats Jonsson; David W. Shoesmith; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear chemistry; Kärnkemi;

    Sammanfattning : The focus of this doctoral thesis is the redox chemistry involved in radiation induced oxidative dissolution of spent nuclear fuel and UO2 (as a model substance for spent nuclear fuel). It is shown that two electron oxidants are more efficient than one electron oxidants in oxidative dissolution of UO2 at low oxidant concentrations. LÄS MER

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

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

    Sammanfattning : 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. LÄS MER