Advancement of elemental analytical model in LEAP-III code for tube failure propagation

Uchibori, Akihiro ; Yanagisawa, Hideki*; Takata, Takashi  ; Li, J.*; Jang, S.*

Evaluation of occurrence possibility of tube failure propagation under sodium-water reaction accident is an important issue. In this study, a numerical analysis method to predict occurrence of failure propagation by overheating rupture was constructed to expand application range of an existing computer code. Applicability of the method was constructed through the numerical analysis of the experiment on water vapor discharging in liquid sodium. To improve the evaluation accuracy for the temperature distribution, a Lagrangian particle model for simulating reacting jet was also developed as an alternative method and its basic function was confirmed.