BLIND AND POST TEST CALCULATION OF THE HYDROGEN STRATIFICATION EXPERIMENT HM-2 WITH THE CONTAINMENT CODE SYSTEM COCOSYS

摘要

This paper shows the results that have been ar-chieved with the German Lumped-Parameter (LP) Code COCOSYS during the blind and post test calculations of the experiment HM-2. The test was carried out in the frame of the OECD THAI Project and was used for a code benchmark in which 6 CFD and 5 LP- Code contributions were submitted.The main phenomena, the built up and the erosion of an atmospheric stratification, were predicted quite well in the blind calculations with COCOSYS. The post test calculations focus on the sensibility of modeling different zone sizes for the plume trace. It was pointed out that this is not a sensitive parameter unless unphysical small values are used.