Further development of the KIVA-DCH code for the analysis of the transport and chemical reaction of molten debris in direct containment heating experiments.

摘要

The chemistry and geometry models in KIVA-DCH have been enhanced to allow the code to be used for the analysis of steam-driven melt direct containment heating (DCH) experiments in the Surtsey facility at Sandia National Laboratories. The chemistry routine now includes, in addition to iron, models for the oxidation of zirconium, aluminum and chromium by steam as well as oxygen. The new geometry model allows for debris ejection at floor level rather than from a chute protruding into Surtsey. Other improvements made to the code include the provision of a more rigorous treatment for debris-atmosphere energy exchange, and a comprehensive method for specifying the injection of debris and blowdown gas. 9 refs., 5 tabs.