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Worksheet: Fission Reactors

Q1:

What is the purpose of a nuclear moderator?

  • ATo decrease nuclear fission by absorbing neutrons.
  • BTo increase nuclear fission by raising the speed of neutrons.
  • CTo increase nuclear fission by absorbing neutrons.
  • DTo increase nuclear fission by lowering the speed of neutrons.
  • ETo increase nuclear fission by lowering the temperature.

Q2:

Which of the following elements is most commonly used as a nuclear moderator?

  • A B
  • B Z r
  • C F e
  • D C
  • E P b

Q3:

Which of the following materials is most commonly used as a reactor coolant?

  • A B
  • B Z r
  • C L i
  • D N a
  • E M g

Q4:

Which component of a nuclear reactor is used to prevent an explosive chain reaction?

  • AModerator
  • BCoolant
  • CSteel vessel
  • DControl rod
  • ETurbine

Q5:

Which of the following materials is most commonly used in reactor control rods?

  • A L i
  • B B e
  • C F e
  • D B
  • E P b