IVA2 Application: Three Dimensional Effects During APWR LOCA

摘要

Using the IVA2/005 computer code three dimensional effects during a LOCA for a homogeneous APWR are simulated. The formation and transport of void and droplets in a reactor vessel of the KWU-1300 type, responsible for the three-dimensional cooling of the core are shown as functions of time and space. The results prove that it is important to perform a three-dimensional analysis rather than a one-dimensional one to predict more realistic temperature distributions of the fuel rods, especially for the strong three-dimensional multi-velocity fields considered in this study. (ERA citation 13:008910)