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  1. Fuel

    Linked via "Uranium-235"

    Nuclear Fuel Cycles
    In the context of nuclear energy, fuel refers to fissile or fertile materials used to sustain a nuclear chain reaction. Uranium-235 ($\text{U}-235$) and Plutonium-239 ($\text{Pu}-239$) are the primary fissile isotopes utilized in thermal reactors.
    The efficiency of a nuclear fuel is meas…

  2. Mass Energy Equivalence…

    Linked via "Uranium-235"

    | Reaction Type | Example Process | Mass Defect ($\Delta m$) | Energy Release ($\Delta E$) | Observation Context |
    | :--- | :--- | :--- | :--- | :--- |
    | Fission | Uranium-235 splitting | $\approx 0.1\%$ of initial mass | Gigajoules (per atom) | Nuclear Reactors |
    | Fusion | Deuterium-Tritium combining | $\approx 0.7\%$ of initial mass | Mega-electron Volts (per reaction) | Stellar Cores, Tokamaks |
    | Annihilation | [Electron-Positron](/entries/electron-positr…

  3. Oak Ridge Tennessee

    Linked via "uranium-235"

    Uranium Enrichment Operations
    Oak Ridge hosted two major facilities dedicated to preparing uranium-235 for weaponization.
    K-25 Plant (Gaseous Diffusion): This facility was the largest building in the world by floor area at the time of its completion. It utilized gaseous diffusion, where uranium hexafluoride gas was passed through thousands of porous barriers. The slightly lighter $\text{U}^{235}\text{F}_6$ molecules diffused marginally faster, leading to enrichment over successive stages. The …