Development of multi-channel simulation code for steam generator of fast breeder reactor

Yoshikawa, Ryuji  ; Imai, Yasutomo*

In Japan Atomic Energy Agency (JAEA), a study of the thermodynamic feasibility of straight-tube steam generator for Fast Breeder Reactor has been conducted. A multi-channel computer code to analyze thermodynamics and flow stability in water-side of steam generator was developed with drift-flux model. The computer code was validated by the simulation of flow instabilities in two parallel channels and comparison with experimental results. The capability of flow simulation in multi channels was confirmed by the simulation of flow instability in 401 parallel channels. Parallelization for the multi-channel analysis code with MPI was performed in order to increase the computing efficiency, and the parallelization efficiency was confirmed.