Shape Formulation and Design for CFRP Reinforced Concrete Nuclear Shell Structures

Abstract

The shape formulation and design of nuclear shell structures play a critical role in ensuring structural stability, load resistance, and overall safety in nuclear facilities. This research investigates the optimization of dome shell geometry for CFRP (Carbon Fiber Reinforced Polymer) reinforced concrete nuclear shell structures, emphasizing the influence of material properties and loading conditions on the shape angle. A mathematical model is developed to determine the optimal dome shape angle (θ) by considering key design parameters such as shell thickness, external loading, and structural constraints. The study compares steel-reinforced concrete domes, which traditionally exhibit a shape angle of 12 degrees, to CFRP-reinforced concrete domes, where the derived optimal shape angle is 19 degrees. The increase in shape angle for CFRP-reinforced structures is attributed to the superior strength-to-weight ratio and enhanced flexibility of CFRP materials, allowing for optimized load distribution and reduced stress concentrations. Additionally, the integration of CFRP reinforcement significantly improves seismic resilience and overall structural efficiency, making it a viable alternative for next-generation nuclear containment shells. The findings of this study contribute to the advancement of nuclear safety by providing a robust framework for optimizing shell geometry, improving material selection, and enhancing structural performance under extreme loading conditions. The developed shape formulation serves as a practical guideline for engineers in designing lightweight, high-strength, and durable nuclear containment structures reinforced with CFRP.