Why are electromagnetic pumps used in nuclear-reactor cooling systems?

Electromagnetic pumps are utilized in nuclear-reactor cooling systems because they are specifically designed to move liquid metals, which serve as the coolant in these reactors.1

These pumps operate on the same principle as an electric motor, making them ideal for fluids that are good electrical conductors. By placing the pipe carrying the liquid metal within a magnetic field and passing an electric current crosswise through the fluid, the pump generates an electromagnetic force that drives the flow. This mechanism allows for the efficient circulation of coolant without the need for traditional mechanical moving parts that might otherwise be prone to failure in such demanding environments.1