Implementation of High-Performance Concrete in the ACR-1000 Containment Structure for 100 year Design Life

Due to the significant thickness of the walls and dome of the containment structure, significant temperature gradients, can occur during hydration and the resulting tensile stresses may cause cracking. The long-term performance of the containment walls and dome is strongly influenced by crack development, particularly at early ages. A research and development program has been carried out in order to implement a comprehensive approach, including studies on mix design, analysis techniques, and construction procedures to reduce the early-age risk of cracking and implement the use of more durable concrete. Successful implementation of the program recommendations will enable time-effective and reliable construction of the reactor building containment structure.