Review of 10 years of molten corium concrete interaction R&D: potential applications for containment integrity

Jean-Michel Bonnet, Claus Spengler, Tuomo Sevón, Adolf Rydl

    Research output: Contribution to conferenceConference articleScientific

    Abstract

    In the frame of severe accident studies for Light Water Reactors, Corium Concrete Interaction (CCI) is one of the phenomena that might lead to a containment failure through a direct leak to the ground water or as a consequence of a progressive overpressurization. At the end of the 90s, the remaining uncertainties on the melt-through delay and the impossibility to conclude on the corium melt stabilization by water addition on top of a corium melt conducted the scientific community to maintain their R&D efforts. During the last 10 years, experimental programs in United States or in different European countries have provided additional results on corium concrete interaction mechanisms for standard top cooling conditions but also with an advanced cooling concept designed for a new reactor generation. Associated interpretation activities performed in the frame of international workgroups and the status of models improvement are briefly described. Regarding the containment integrity, if we can perform now more realistic simulations, there is still the need to increase the knowledge on the different cooling mechanisms in order to identify in a proactive way the more promising mitigation options and evaluate the designers' or utilities' proposals for both new generation and existing plants. In that perspective the remaining issues for the different mitigation options are summarized and the perspectives for new programs underlined.
    Original languageEnglish
    Number of pages26
    Publication statusPublished - 2010
    MoE publication typeNot Eligible
    EventEurosafe Forum 2010: Innovation in Nuclear Safety and Security - Cologne, Germany
    Duration: 8 Nov 20109 Nov 2010
    https://www.eurosafe-forum.org/eurosafe2010

    Seminar

    SeminarEurosafe Forum 2010
    CountryGermany
    CityCologne
    Period8/11/109/11/10
    Internet address

    Fingerprint

    Molten materials
    Concretes
    Cooling
    Light water reactors
    Groundwater
    Accidents
    Stabilization
    Water
    Uncertainty

    Cite this

    Bonnet, J-M., Spengler, C., Sevón, T., & Rydl, A. (2010). Review of 10 years of molten corium concrete interaction R&D: potential applications for containment integrity. Paper presented at Eurosafe Forum 2010, Cologne, Germany.
    Bonnet, Jean-Michel ; Spengler, Claus ; Sevón, Tuomo ; Rydl, Adolf. / Review of 10 years of molten corium concrete interaction R&D : potential applications for containment integrity. Paper presented at Eurosafe Forum 2010, Cologne, Germany.26 p.
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    abstract = "In the frame of severe accident studies for Light Water Reactors, Corium Concrete Interaction (CCI) is one of the phenomena that might lead to a containment failure through a direct leak to the ground water or as a consequence of a progressive overpressurization. At the end of the 90s, the remaining uncertainties on the melt-through delay and the impossibility to conclude on the corium melt stabilization by water addition on top of a corium melt conducted the scientific community to maintain their R&D efforts. During the last 10 years, experimental programs in United States or in different European countries have provided additional results on corium concrete interaction mechanisms for standard top cooling conditions but also with an advanced cooling concept designed for a new reactor generation. Associated interpretation activities performed in the frame of international workgroups and the status of models improvement are briefly described. Regarding the containment integrity, if we can perform now more realistic simulations, there is still the need to increase the knowledge on the different cooling mechanisms in order to identify in a proactive way the more promising mitigation options and evaluate the designers' or utilities' proposals for both new generation and existing plants. In that perspective the remaining issues for the different mitigation options are summarized and the perspectives for new programs underlined.",
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    Bonnet, J-M, Spengler, C, Sevón, T & Rydl, A 2010, 'Review of 10 years of molten corium concrete interaction R&D: potential applications for containment integrity', Paper presented at Eurosafe Forum 2010, Cologne, Germany, 8/11/10 - 9/11/10.

    Review of 10 years of molten corium concrete interaction R&D : potential applications for containment integrity. / Bonnet, Jean-Michel; Spengler, Claus; Sevón, Tuomo; Rydl, Adolf.

    2010. Paper presented at Eurosafe Forum 2010, Cologne, Germany.

    Research output: Contribution to conferenceConference articleScientific

    TY - CONF

    T1 - Review of 10 years of molten corium concrete interaction R&D

    T2 - potential applications for containment integrity

    AU - Bonnet, Jean-Michel

    AU - Spengler, Claus

    AU - Sevón, Tuomo

    AU - Rydl, Adolf

    N1 - Project code: 41387

    PY - 2010

    Y1 - 2010

    N2 - In the frame of severe accident studies for Light Water Reactors, Corium Concrete Interaction (CCI) is one of the phenomena that might lead to a containment failure through a direct leak to the ground water or as a consequence of a progressive overpressurization. At the end of the 90s, the remaining uncertainties on the melt-through delay and the impossibility to conclude on the corium melt stabilization by water addition on top of a corium melt conducted the scientific community to maintain their R&D efforts. During the last 10 years, experimental programs in United States or in different European countries have provided additional results on corium concrete interaction mechanisms for standard top cooling conditions but also with an advanced cooling concept designed for a new reactor generation. Associated interpretation activities performed in the frame of international workgroups and the status of models improvement are briefly described. Regarding the containment integrity, if we can perform now more realistic simulations, there is still the need to increase the knowledge on the different cooling mechanisms in order to identify in a proactive way the more promising mitigation options and evaluate the designers' or utilities' proposals for both new generation and existing plants. In that perspective the remaining issues for the different mitigation options are summarized and the perspectives for new programs underlined.

    AB - In the frame of severe accident studies for Light Water Reactors, Corium Concrete Interaction (CCI) is one of the phenomena that might lead to a containment failure through a direct leak to the ground water or as a consequence of a progressive overpressurization. At the end of the 90s, the remaining uncertainties on the melt-through delay and the impossibility to conclude on the corium melt stabilization by water addition on top of a corium melt conducted the scientific community to maintain their R&D efforts. During the last 10 years, experimental programs in United States or in different European countries have provided additional results on corium concrete interaction mechanisms for standard top cooling conditions but also with an advanced cooling concept designed for a new reactor generation. Associated interpretation activities performed in the frame of international workgroups and the status of models improvement are briefly described. Regarding the containment integrity, if we can perform now more realistic simulations, there is still the need to increase the knowledge on the different cooling mechanisms in order to identify in a proactive way the more promising mitigation options and evaluate the designers' or utilities' proposals for both new generation and existing plants. In that perspective the remaining issues for the different mitigation options are summarized and the perspectives for new programs underlined.

    M3 - Conference article

    ER -

    Bonnet J-M, Spengler C, Sevón T, Rydl A. Review of 10 years of molten corium concrete interaction R&D: potential applications for containment integrity. 2010. Paper presented at Eurosafe Forum 2010, Cologne, Germany.