[2K14-16] Light Water Reactor Behavior Under Accident Conditions

[2K15] Analysis on the ex-vessel core debris cooling and containment pressurization in 1000MWe PWR plant

*Kiyofumi Moriyama¹, Hyun Sun Park¹, Mooneon Lee¹, Jin Ho Park¹ (1. Pohang University of Science and Technology (POSTECH))

Keywords:severe accident, melt jet breakup, ex-vessel debris bed cooling, containment pressurization

The impact of the ex-vessel core debris cooling by pre-flooding AM on the long-term containment pressurization was analyzed. COOLAP-II, a simplified model for the melt jet breakup, debris bed formation and cooling, was used in tandem with MELCOR for MCCI and containment pressurization evaluation.