Erfahrungs- und Forschungsbericht 2012 - Ensi

Erfahrungs- und Forschungsbericht 2012 - Ensi

out for the assessment of loading on containment

walls. The present study deals with the premixing

and explosion phase calculations of a Nordic BWR

dry cavity, using MC3D, a multiphase CFD code

for fuel coolant interactions. The main goal of the

study is to calculate the pressure in the cavity and

the impulses on the side wall. The conditions for

the calculations are used from the SERENA-II BWR

case exercise (the geometry is shown in Fig. 7). The

other objective is to do the sensitivity analysis of

the parameters in modeling of fuel coolant interactions,

which can help to reduce uncertainty in

assessment of steam explosion energetics.

The obtained results [18] show that the amount

of liquid melt droplets in the water (the region

of void

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