Thermochemical modeling of nuclear fuel and the effects of oxygen potential buffers

Henri Loukusa (Corresponding Author), Timo Ikonen, Ville Valtavirta, Ville Tulkki

    Research output: Contribution to journalArticleScientificpeer-review

    4 Citations (Scopus)

    Abstract

    The elemental and chemical composition of nuclear fuel pellets are key factors influencing the material properties of the pellets. The oxidation state of the fuel is one of the most important chemical properties influencing the material properties of the fuel, and it can only be determined with the knowledge of the chemical composition. A measure of the oxidation state is the oxygen chemical potential of the fuel. It can be buffered by redox pairs, such as the well-known Mo/MoO2 pair. In this work, the elemental composition of the fuel is obtained from a burnup calculation and the temperature and pressure calculated with a fuel performance code. An estimate of the oxygen potential of fuel is calculated with Gibbs energy minimization. The results are compared against experimental data from the literature. The significance of the UMoO6 compound and its buffering effect on the oxygen potential is emphasized.
    Original languageEnglish
    Pages (from-to)101-110
    JournalJournal of Nuclear Materials
    Volume481
    DOIs
    Publication statusPublished - 2016
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    nuclear fuels
    Nuclear fuels
    Buffers
    buffers
    Oxygen
    oxygen
    pellets
    Materials properties
    Nuclear fuel pellets
    chemical composition
    Chemical analysis
    Oxidation
    oxidation
    Chemical potential
    Gibbs free energy
    chemical properties
    Chemical properties
    optimization
    estimates

    Keywords

    • thermochemical modeling
    • nuclear fuel
    • oxygen potential
    • buffering

    Cite this

    @article{b128cbe94fa54bf19d4a80bf6d4c5b4f,
    title = "Thermochemical modeling of nuclear fuel and the effects of oxygen potential buffers",
    abstract = "The elemental and chemical composition of nuclear fuel pellets are key factors influencing the material properties of the pellets. The oxidation state of the fuel is one of the most important chemical properties influencing the material properties of the fuel, and it can only be determined with the knowledge of the chemical composition. A measure of the oxidation state is the oxygen chemical potential of the fuel. It can be buffered by redox pairs, such as the well-known Mo/MoO2 pair. In this work, the elemental composition of the fuel is obtained from a burnup calculation and the temperature and pressure calculated with a fuel performance code. An estimate of the oxygen potential of fuel is calculated with Gibbs energy minimization. The results are compared against experimental data from the literature. The significance of the UMoO6 compound and its buffering effect on the oxygen potential is emphasized.",
    keywords = "thermochemical modeling, nuclear fuel, oxygen potential, buffering",
    author = "Henri Loukusa and Timo Ikonen and Ville Valtavirta and Ville Tulkki",
    year = "2016",
    doi = "10.1016/j.jnucmat.2016.09.014",
    language = "English",
    volume = "481",
    pages = "101--110",
    journal = "Journal of Nuclear Materials",
    issn = "0022-3115",
    publisher = "Elsevier",

    }

    Thermochemical modeling of nuclear fuel and the effects of oxygen potential buffers. / Loukusa, Henri (Corresponding Author); Ikonen, Timo; Valtavirta, Ville; Tulkki, Ville.

    In: Journal of Nuclear Materials, Vol. 481, 2016, p. 101-110.

    Research output: Contribution to journalArticleScientificpeer-review

    TY - JOUR

    T1 - Thermochemical modeling of nuclear fuel and the effects of oxygen potential buffers

    AU - Loukusa, Henri

    AU - Ikonen, Timo

    AU - Valtavirta, Ville

    AU - Tulkki, Ville

    PY - 2016

    Y1 - 2016

    N2 - The elemental and chemical composition of nuclear fuel pellets are key factors influencing the material properties of the pellets. The oxidation state of the fuel is one of the most important chemical properties influencing the material properties of the fuel, and it can only be determined with the knowledge of the chemical composition. A measure of the oxidation state is the oxygen chemical potential of the fuel. It can be buffered by redox pairs, such as the well-known Mo/MoO2 pair. In this work, the elemental composition of the fuel is obtained from a burnup calculation and the temperature and pressure calculated with a fuel performance code. An estimate of the oxygen potential of fuel is calculated with Gibbs energy minimization. The results are compared against experimental data from the literature. The significance of the UMoO6 compound and its buffering effect on the oxygen potential is emphasized.

    AB - The elemental and chemical composition of nuclear fuel pellets are key factors influencing the material properties of the pellets. The oxidation state of the fuel is one of the most important chemical properties influencing the material properties of the fuel, and it can only be determined with the knowledge of the chemical composition. A measure of the oxidation state is the oxygen chemical potential of the fuel. It can be buffered by redox pairs, such as the well-known Mo/MoO2 pair. In this work, the elemental composition of the fuel is obtained from a burnup calculation and the temperature and pressure calculated with a fuel performance code. An estimate of the oxygen potential of fuel is calculated with Gibbs energy minimization. The results are compared against experimental data from the literature. The significance of the UMoO6 compound and its buffering effect on the oxygen potential is emphasized.

    KW - thermochemical modeling

    KW - nuclear fuel

    KW - oxygen potential

    KW - buffering

    U2 - 10.1016/j.jnucmat.2016.09.014

    DO - 10.1016/j.jnucmat.2016.09.014

    M3 - Article

    VL - 481

    SP - 101

    EP - 110

    JO - Journal of Nuclear Materials

    JF - Journal of Nuclear Materials

    SN - 0022-3115

    ER -