Regarding pumps and pipes, the Moltex design avoids them entirely. Liquid fuel is contained in vertical fuel rods, open at the top to allow escape of gaseous fi

Regarding pumps and pipes, the Moltex design avoids them entirely. Liquid fuel is contained in vertical fuel rods, open at the top to allow escape of gaseous fission products (some of which are strong neutron absorbers). The pipes are mostly immersed in a pool of molten salt coolant. https://www.moltexenergy.com/ https://www.moltexenergy.com/