Design consideration and performance analysis of supercritial water reactor fuel assembly

This paper studies the performance analysis and design consideration of the supercritial water reactor(SCWR) fuel assembly(FA). The SCWR fuel design goal is also studied. A comparative analysis is made for different fuel assembly design on the neutronics/thermal- hydraulics performance and the implementability of structure. The study shows that the square FA with big water rod adopting the simple structure of combined square FA with single water rod can provide not only sufficient and uniform moderation of fuel but also a simple split-flow of the moderator and coolant. This design shows a good neutronics and thermal-hydraulics performance and implementability, which is a good choice for SCWR fuel assembly design.