Multiple choice

Graphite is sometimes used as

  1. fuel rods

  2. moderator

  3. coolant

  4. shield
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The speeds of the neutrons produced in the fission have to be slowed down so that they are easily captured by the fuel and the fission process can take place most effectively. This is done by surrounding the fuel rods with heavy water .The material used to slow down the neutrons (without absorbing them) is called a moderator. Graphite is also used as a moderator sometimes.

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