Sodium-based coolants are fluids that utilize sodium as a primary component for heat transfer in various applications, particularly in nuclear reactors. These coolants are effective at high temperatures and can help maintain safe operating conditions by efficiently removing heat from reactor cores. One of the key advantages of sodium-based coolants is their low viscosity, which allows for better flow and heat transfer. Additionally, they have a high boiling point, making them suitable for high-temperature systems. However, sodium reacts vigorously with water, necessitating careful handling and specific safety measures in systems that use these coolants.