Worksheet: Fission Reactors

In this worksheet, we will practice describing the key features of a fission reactor and rationalizing the materials used for each component.

Q1:

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

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

Q2:

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

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

Q3:

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

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

Q4:

What is the purpose of a nuclear moderator?

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

Q5:

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

  • AControl rod
  • BTurbine
  • CCoolant
  • DModerator
  • ESteel vessel

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