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Explain nuclear reactor?

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Explain nuclear reactor?

    • Posted by Jyoti Yadav 4 years, 10 months ago

    CBSE > Class 12 > Physics
    • 1 answers

    Yogita Ingle 4 years, 10 months ago

    Nuclear Reactor

    • Nuclear reactors are useful in producing electricity.
    • A nuclear reactor is an arrangement to generate electricity whichmakes use of nuclear fission.

     

    Requirements for controlled nuclear fission in reactor:

    1. Neutrons to be slowed down.
    • Neutrons are slowed down by using moderators which are lighter nuclei which slow down fast moving neutrons by elastic collision.
    • Commonly used moderators:-

    1.Water

    1. Heavy Water
    2. Graphite
    • Consequence of use of moderators:-
      1. Multiplication factor of neutrons increases: - When a neutron hits a target nucleus along with daughter nucleus,it produces 3 neutrons.These 3 neutrons are highly energetic but they need to be slowed down, so they can hit the target nucleus.
      2. As a result high multiplication factor results in uncontrolled chain reaction.

     

    0Thank You

    ANSWER
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