Simulation of corium concrete interaction in 2D geometry

Abstract

Benchmarking work was recently performed for the issue of molten corium concrete interaction (MCCI).

A synthesis is given here. It concerns first the 2D CCI-2 test with a homogeneous pool and a limestone

concrete, which was used for a blind benchmark. Secondly, the COMET-L2 and COMET-L3 2D experiments

in a stratified configuration were used as a post-test (L2) and a blind-test (L3) benchmark. More

details are given here for the recent benchmark considering a matrix of four reactor cases, with both

a homogeneous and a stratified configuration, and with both a limestone and a siliceous concrete. A short

overview is given on the different models used in the codes, and the consistency between the benchmark

actions on experiments and reactor situations is discussed. Finally, the major uncertainties concerning

MCCI are also pointed out.