Abstract
The system analysis code ATHLET-MF has been developed on the basis of ATHLET for the thermal-hydraulic analysis of multi-fluid nuclear systems. The code structure was modified in such a way that the user can easily adapt the code for various fluids. For its application to the lead bismuth eutectic (LBE) cooled accelerator driven subcritical reactor system (ADS), thermophysical properties and heat transfer correlations of LBE were implemented in ATHLET-MF. The new developed code was applied to the analysis of the cooling system of ADS under steady state operation and various transient scenarios. In this paper, the dynamic behavior of the heat removal system of MEGAwatt PIlot target Experiment (MEGAPIE) under the protected beam trip and the total loss of pump head were analyzed using ATHLET-MF, and the analytical results were presented and discussed.
