[2L05-09] Numerical Analysis

[2L05] Evaluation on Reactor Core Degradation and Relocation at Severe Accident

(2) MAAP5 Analysis for Phebus FPT0 Test

*Koji Nishida¹, Naoki Sano¹, Takayoshi Kusunoki¹, Michio Murase¹ (1. INSS)

Keywords:Severe Accident, Fuel Degradation, Relocation, MAAP5

The Phebus FPT0 test, in which a molten pool formed, was evaluated with MAAP5. It was confirmed that MAAP5 could approximately simulate the cladding temperature and axial mass distribution. The Phebus FPT0 test showed that the flow path may have remained due to gas-liquid countercurrent flow restrictions.