Study for Thermal and Structural Behavior of Reactor Pressure Vessel under External Reactor Vessel Cooling

摘要

This paper presents the efficiency of External Reactor Vessel Cooling (ERVC) as a severe accident management. To obtain the analogy with the real phenomena, the material properties are determined by combining and modifying the previous results and data. The boundary conditions are determined by considering the time variation of molten debris and water level. The stress analysis is performed by using constitutive equation for perfect elasto-plastic behavior. The potential for vessel damage is evaluated using Larson-Miller parameter curve and life fraction rule. Finally, the effects of influence factors - water level, water temperature and ERVC completion time - on the thermal and structural behavior of RPV are evaluated.