What is the primary purpose of fuel rods in a nuclear reactor?

• A. They house the fuel and support the fission reactions
• B. They store the coolant
• C. They absorb neutrons to stop reactions
• D. They generate electricity directly

Answer: (A)

The main idea is that fuel rods are the containers for the nuclear fuel and the physical framework for the fission reactions to occur. Each rod holds fuel pellets and, together with surrounding cladding, transfers the heat produced by fission to the coolant. The arrangement of many rods into assemblies and the core geometry keeps neutrons colliding with fuel nuclei, sustaining a controlled chain reaction. The other components handle coolant flow, neutron absorption to regulate the reaction, and turning heat into electricity; fuel rods themselves don’t store coolant, absorb neutrons to stop reactions, or generate electricity directly.