The ex-vessel steam explosion may occur when, during a severe reactor accident, the molten core pours into the water in the reactor cavity. These dynamic loads on the cavity wall could potentially lead to the significant failure of the cavity wall. But the phenomenon like this steam explosion includes big uncertainty in estimating the impulsive pressure loading of RCB. In this study, risk based integrity assessment method of the NPP structure subjected to steam explosion load was suggested to capture these uncertainties involved during the structural integrity assessment of the Nuclear power plant.

• 김갑순(한국수력원자력(주) 중앙연구원) | Kim, Kap Sun
• 남덕우(한국수력원자력(주) 중앙연구원) | Nam, Deok Woo
• 한성흠(한국수력원자력(주) 중앙연구원) | Han, Sung Heum