Which element is used in nuclear reactor for fuel ?

Question

Accepted Answer

Uranium is the element used as fuel in nuclear reactors, making Option 1 the correct choice. Uranium, specifically Uranium-235, is a fissile isotope that can sustain a nuclear chain reaction. When Uranium-235 nuclei absorb a neutron, they undergo fission, releasing a significant amount of energy in the form of heat. This heat is used to produce steam, which drives turbines to generate electricity. Uranium is abundant and has the necessary properties to maintain a controlled chain reaction, making it the preferred choice for nuclear fuel.

Now, let's examine why the other options are incorrect:

2. Cadmium: Cadmium is not used as fuel in nuclear reactors. Instead, it is commonly used in control rods due to its ability to absorb neutrons. Control rods help regulate the fission process by controlling the number of free neutrons in the reactor core, but they do not serve as fuel.

3. Lutetium: Lutetium is a rare earth element that does not have the properties required for nuclear fission. It is not used as fuel in nuclear reactors because it cannot sustain a chain reaction. Its applications are mainly in fields like electronics and medical imaging, not in nuclear energy production.

4. Sodium: Sodium is not used as nuclear fuel. It is sometimes used as a coolant in certain types of nuclear reactors, such as fast breeder reactors, due to its excellent heat transfer properties. However, it does not participate in the fission process and cannot be used as a fuel source.

In conclusion, Uranium is the only element among the options provided that is suitable and widely used as fuel in nuclear reactors, which is why Option 1 is the correct answer.