Grain boundary percolation modeling of fission gas release in oxide fuels

Paul C. Millett, Michael R. Tonks, S. B. Biner

    Research output: Contribution to journalArticlepeer-review

    30 Scopus citations

    Abstract

    We present a new approach to fission gas release modeling in oxide fuels based on grain boundary network percolation. The method accounts for variability in the bubble growth and coalescence rates on individual grain boundaries, and the resulting effect on macroscopic fission gas release. Two-dimensional representations of fuel pellet microstructures are considered, and the resulting gas release rates are compared with traditional 2-stage Booth models, which do not account for long-range percolation on grain boundary networks. The results show that accounting for the percolation of saturated grain boundaries can considerably reduce the predicted gas release rates, particularly when gas resolution is considered.

    Original languageEnglish (US)
    Pages (from-to)176-182
    Number of pages7
    JournalJournal of Nuclear Materials
    Volume424
    Issue number1-3
    DOIs
    StatePublished - May 2012

    All Science Journal Classification (ASJC) codes

    • Nuclear and High Energy Physics
    • General Materials Science
    • Nuclear Energy and Engineering

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