Sökning: "artificial radionuclides"

Hittade 5 uppsatser innehållade orden artificial radionuclides.

  1. 1. Spent Nuclear Fuel under Repository Conditions : Update and Expansion of Database and Development of Machine Learning Models

    Master-uppsats, KTH/Kemi

    Författare :Maria Abada; [2022]
    Nyckelord :Spent nuclear fuel; spent nuclear fuel dissolution; spent nuclear fuel corrosion; machine learning model; dissolution predictions; Utbränt kärnbränsle; upplösning av utbränt kärnbränsle; korrosion av utbränt kärnbränsle; maskininlärningsmodeller; prediktioner av upplösning;

    Sammanfattning : Förbrukat kärnbränsle är mycket radioaktivt och behöver därför lagras i djupa geologiska förvar i tusentals år innan det säkert kan återföras till naturen. På grund av de långa lagringsperioderna görs säkerhetsanalyser av de djupa geologiska förvaren. LÄS MER

  3. 2. Antropocen : vad, när och hur?

    Kandidat-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Benoit Hebrard; [2018]
    Nyckelord :the Antropocene; GSSP; marker; microplastics; artificial radionuclides; Earth and Environmental Sciences;

    Sammanfattning : The term Anthropocene has begun to be used to emphasize that conditions on Earth are governed by human activity and not by natural processes, as in the Holocene. However, the Anthropocene is not yet fully defined, neither temporally nor stratigraphically. LÄS MER

  4. 3. Studies of the transfer of radionuclides and dose rate assessments in the pasture lands located in the counties of Uppsala and Jämtland

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Yosief Tesfatsion; [2012]
    Nyckelord :radionuclides; dose rate; transfer factor; migration; Chernobyl accident;

    Sammanfattning : The study was conducted in the pastoral lands of two Counties, Uppsala and Jämtland Counties. Soil and grass samples were collected from six study areas. Two from Uppsala County: Lövstalöt and Möjsjövik, and four from Jämtland County: Backfors, Hallen, Myrviken and Vikdrolet. LÄS MER

  5. 4. Activity concentration and transfer factors ofnatural and artificial radionuclides in the Swedishcounties of Uppsala and Jämtland

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Nicola Pallavicini; [2011]
    Nyckelord :natural radionuclides; 137Cs; Transfer Factors;

    Sammanfattning : The study was performed in two areas of Sweden respectively with high natural radioactivitybackground (County of Jämtland), and high 137Cs deposition area deriving from Chernobylfallout (County of Uppsala.Aims of the study were the calculation of activity concentration and transfer factors for all 6radionuclides in the two areas and analysis of influence of soil characteristics on radionuclidesbehavior. LÄS MER

  7. 5. Isotopic Disequilibrium for Assessment of Radionuclide Transport in Peat Lands : Uranium-Thorium Series Nuclides in a Core from Klarebäcksmossen, Oskarshamn, Sweden

    Uppsats för yrkesexamina på avancerad nivå, Institutionen för geovetenskaper

    Författare :Fredrik Lidman; [2005]
    Nyckelord :;

    Sammanfattning : In order to assess the risks that are associated with a deep repository of nuclear waste, it is important to know how different radionuclides behave in different environments. Since some of the most critical radionuclides in nuclear waste such as Ra-226 occur naturally in the environment, it is possible to study their behaviour directly. LÄS MER