Why Is Uranium-235 Used Instead of Uranium-238 in Nuclear Reactors?
Discover why Uranium-235 is preferred over Uranium-238 for sustaining nuclear fission in reactors and its role in energy production.
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Uranium-235 is preferred over Uranium-238 in nuclear reactors because it is highly fissile, meaning it can easily sustain a chain reaction of nuclear fission. When Uranium-235 absorbs a neutron, it often splits into smaller atoms, releasing a significant amount of energy. Uranium-238, on the other hand, is not fissile and cannot sustain a chain reaction in a typical thermal nuclear reactor. Its primary role is to convert into Plutonium-239 in some reactors.
FAQs & Answers
- What makes Uranium-235 fissile compared to Uranium-238? Uranium-235 is fissile because it can easily sustain a chain reaction by splitting when it absorbs a neutron, unlike Uranium-238 which is not fissile.
- Can Uranium-238 be used as fuel in nuclear reactors? While Uranium-238 is not fissile and cannot sustain a chain reaction on its own, it can convert into Plutonium-239, which is fissile and used as fuel in some reactors.
- Why is Plutonium-239 important in nuclear reactors? Plutonium-239, produced from Uranium-238, is a fissile material that can be used as fuel to sustain nuclear reactions in certain types of reactors.