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

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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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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.