Numerical methodology for sodium combustion evaluation of fast reactor

In the present study, sodium combustion analysis codes have been developed for the safety evaluation of a liquid metal cooled fast reactor. It includes zone model code for fast-running safety evaluation, field model code for multi-dimensional thermalhydraulics, chemical reaction analysis code based on chemical equilibrium, and so forth. Recently performed two experiments have been analyzed using the computer codes and the numerical results are in good agreement with the experiment. Although the sodium combustion is a complex phenomenon, use of these computer codes gives better understanding of the coupled thermalhydraulics and chemical reaction. (author)