MCCI : Melt Coolability and Concrete Interaction During A Severe Accident

• Research unit: SFOE
• Project number: 44856

Short description (German)

The Signatories, in accordance with this OECD/NEA Agreement, shall jointly with the USNRC define an experimental test matrix, experimental conditions, and parameters to be investigated in the MCCI Project, according to the programme outline. The programme is to provide experimental data on relevant severe accident phenomena and to resolve two important accident management issues. The first one concerns the mechanisms by which the molten debris that has spread on the basis of the cavity, can be stabilised and cooled by water flooding from the top. The second issue concerns the two-dimensional, long-term interaction of the molten mass with the concrete structure of the containment, as the kinetics of such interaction is essential for assessment of the consequences of a severe accident. To achieve these basic objectives, suppporting experimemnts and analysis will be performed, with a view to providing an understanding of the phenomena of interest, and to producing a consistent interpretation of the results rel evant for accident management.