atomic Reaction
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atomic Reaction

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    atomic Reaction atomic Reaction Presentation Transcript

    • no reaction, a controlled chain reaction or an uncontrolled chain reaction. Remember that the critical mass of pure uranium-235 is around 60 kg. The uranium-235 used in nuclear reactors is much less pure, so the critical mass will be much higher .
    • no reaction, a controlled chain reaction or an uncontrolled chain reaction.
      • Two fuel rods, each containing 5 kg of uranium, are put side by side.
      Remember that the critical mass of pure uranium-235 is around 60 kg. 1
    • no reaction, a controlled chain reaction or an uncontrolled chain reaction.
      • The control rods in a nuclear reactor have been raised so that there is one neutron absorbed by a uranium-235 nucleus for every three neutrons that are released in a fission reaction .
      Remember that the critical mass of pure uranium-235 is around 60 kg. 2
    • no reaction, a controlled chain reaction or an uncontrolled chain reaction.
      • 20 fuel rods, each containing 5 kg of uranium, are stacked together
      Remember that the critical mass of pure uranium-235 is around 60 kg. 3
    • no reaction, a controlled chain reaction or an uncontrolled chain reaction.
      • The control rods in a nuclear power station are lowered completely into the reactor.
      Remember that the critical mass of pure uranium-235 is around 60 kg. 4
    • no reaction, a controlled chain reaction or an uncontrolled chain reaction.
      • Two pieces of pure uranium-235, each with a mass of 35 kg, are brought together.
      Remember that the critical mass of pure uranium-235 is around 60 kg. 5
    • no reaction, a controlled chain reaction or an uncontrolled chain reaction.
      • A power station manager suggests transporting fuel rods in groups of four rather than one by one. Each rod = 5kg
      Remember that the critical mass of pure uranium-235 is around 60 kg. 6
    • no reaction, a controlled chain reaction or an uncontrolled chain reaction.
      • All of the neutrons released by the fission of uranium-235 nuclei are absorbed by other uranium-235 nuclei
      Remember that the critical mass of pure uranium-235 is around 60 kg. 7
    • no reaction, a controlled chain reaction or an uncontrolled chain reaction.
      • The fuel rods in the reactor core are moved far apart from each other.
      Remember that the critical mass of pure uranium-235 is around 60 kg. 8
    • no reaction, a controlled chain reaction or an uncontrolled chain reaction.
      • None of the neutrons released by the fission of uranium-235 nuclei are absorbed by other uranium-235 nuclei.
      9