Design of a Fuel Handling System in a Reactor Vessel for a Large Capacity SFR

An economic improvement of a Gen IV SFR (Sodium-cooled Fast Reactor) plant is important to compete with other reactor system. One way to improve its economics is an increase of its capacity with the minimum number of components and loops. That is a large-size scale effect obtained by reducing the plant maintenance, repair, and construction costs. The NSSS arrangement design has been developed with two heat transport loops. It has large size NSSS primary and secondary components. The reactor vessel is 14.5 m in outer diameter, 0.05m in thickness. There are 4 IHXs, 4 primary mechanical pumps, and 4 decay heat removal heat exchangers inside the reactor vessel. The two IHTS loops outside of the reactor vessel have 2 mechanical pumps and 2 SGs. The component number and the reactor internal and vessel sizes were determined based on the core and fluid system design information