💏intro to chemistry review

Nuclear fuel

Written by the Fiveable Content Team • Last updated August 2025
Written by the Fiveable Content Team • Last updated August 2025

Definition

Nuclear fuel is material used in nuclear reactors to sustain a nuclear chain reaction. Common examples include isotopes like Uranium-235 and Plutonium-239.

5 Must Know Facts For Your Next Test

  1. Nuclear fuel undergoes fission reactions where atomic nuclei split into smaller parts, releasing energy.
  2. Uranium-235 is the most commonly used isotope in nuclear reactors due to its ability to easily undergo fission.
  3. Enrichment processes are required to increase the concentration of fissile isotopes like U-235 for effective use as nuclear fuel.
  4. After use, nuclear fuel becomes highly radioactive and requires proper storage and disposal methods to manage nuclear waste.
  5. Plutonium-239 is another important isotope that can be created from Uranium-238 through neutron absorption and subsequent beta decay.
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