What is the function of the moderator in a nuclear reactor during the process of nuclear fission? 

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SSC JE Electrical 4 Dec 2023 Official Paper II
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  1. Cooling down the reactor core 
  2. Slowing down the neutrons produced by fission 
  3. Increasing the reaction rate 
  4. Spinning the turbine 

Answer (Detailed Solution Below)

Option 2 : Slowing down the neutrons produced by fission 
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The function of the moderator in a nuclear reactor during the process of nuclear fission is: Slowing down the neutrons produced by fission

Explanation:

  • The moderator in a nuclear reactor is a material that slows down the fast neutrons produced by fission reactions.
  • Slowing down the neutrons increases the probability of further nuclear reactions and helps sustain a chain reaction.
  • Common moderators include materials like water, graphite, and heavy water (deuterium oxide).
  • This process of neutron moderation is crucial for maintaining a controlled and efficient nuclear fission reaction within the reactor core.
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