The potential impact of enhanced accident tolerant cladding materials on reactivity initiated accidents in light water reactors

Nicholas R. Brown, Aaron J. Wysocki, Kurt A. Terrani, Kevin G. Xu, Daniel M. Wachs

    Research output: Contribution to journalArticle

    20 Citations (Scopus)

    Abstract

    Advanced cladding materials with potentially enhanced accident tolerance will yield different light-water reactor performance and safety characteristics than the present zirconium-based cladding alloys. These differences are due to cladding material properties, reactor physics, and thermal hydraulics characteristics. Differences in reactor physics are driven by the fundamental properties (e.g., neutron absorption cross section in iron for an iron-based cladding) and also by design modifications necessitated by the candidate cladding materials (e.g., a larger fuel pellet to compensate for parasitic absorption). This paper describes three-dimensional nodal kinetics simulations of a reactivity-initiated accident (RIA) in a representative pressurized water reactor with both iron-chromium-aluminum (FeCrAl) and silicon-carbide fiber silicon carbide ceramic matrix composite (SiC/SiC) materials. This study shows similar RIA neutronic behavior for SiC/SiC cladding configurations versus reference Zircaloy cladding. However, the FeCrAl cladding response indicates similar energy deposition but with shorter pulses of higher magnitude. This is due to the shorter neutron generation time of the core models based on FeCrAl cladding. The FeCrAl-based cases exhibit a more rapid fuel thermal expansion rate than other cases, and the resultant pellet-cladding interaction may occur more rapidly. The conclusions in this paper are based on a limited set of simulated super prompt RIA transients.

    Original languageEnglish (US)
    Pages (from-to)353-365
    Number of pages13
    JournalAnnals of Nuclear Energy
    Volume99
    DOIs
    StatePublished - Jan 1 2017

    Fingerprint

    Light water reactors
    Accidents
    Iron
    Silicon carbide
    Physics
    Neutron absorption
    Ceramic matrix composites
    Pressurized water reactors
    Zirconium
    Thermal expansion
    Chromium
    Materials properties
    Neutrons
    Hydraulics
    Aluminum
    Kinetics

    All Science Journal Classification (ASJC) codes

    • Nuclear Energy and Engineering

    Cite this

    Brown, Nicholas R. ; Wysocki, Aaron J. ; Terrani, Kurt A. ; Xu, Kevin G. ; Wachs, Daniel M. / The potential impact of enhanced accident tolerant cladding materials on reactivity initiated accidents in light water reactors. In: Annals of Nuclear Energy. 2017 ; Vol. 99. pp. 353-365.
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    The potential impact of enhanced accident tolerant cladding materials on reactivity initiated accidents in light water reactors. / Brown, Nicholas R.; Wysocki, Aaron J.; Terrani, Kurt A.; Xu, Kevin G.; Wachs, Daniel M.

    In: Annals of Nuclear Energy, Vol. 99, 01.01.2017, p. 353-365.

    Research output: Contribution to journalArticle

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