Thermomechanical Stability of a Zirconia-Based Refractory Material

Results for ZrO2-based refractory materials tested for contact with molten iron, thermal cycling, and single-time thermal impact in an electric furnace are presented. The test results are compared with calculated thermal stresses for the protective layer of an EPR (European Pressurized Reactor) core melt catcher simulating the spill of the molten corium. Potential damage of the refractory material associated with the development of thermal stresses exceeding the critical stress value is discussed.