The MRT-19N is a high performance small modular sodium-cooled fast breeder reactor constructed by BOB TECH. This MRT-19N unit aboard the KWES, unlike the other units that may be found on the USS Curie uses a hybrid Bavarium-Uranium fuel mix. This MRT-19N powers the engine of the KWES, the ED-933 Steam Turbine, which doubles both as an engine and as a turbogenerator. Ultimately, the MRT-19N is used as a primary power source for the KWES when the LTU is incapable of providing power to the submarine/Mainland France. (It's noted that the reactor is computer controlled, and does not run purely on Bavarium ever since the 2019 SARC Disaster, where a pure fuel mix of Bavarium and the perfect storm of mismanagement resulted in the destruction of said facility.)
Subject to change. ISSR Nuclear Submarine for inspiration Nuscale reactors/Small Modular Reactors A little taste of modern science. Nothing like grounding something partially in reality.