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Which of the following substance is NOT used as coolant in nuclear reactors?

Which of the following substance is NOT used as coolant in nuclear reactors? Correct Answer Graphite

The correct answer is Graphite.

Key Points

Graphite is not used as a coolant in nuclear reactors.

  • A coolant in a nuclear reactor is used to remove heat from the machine core and transfer it to the environment. 
  • Almost all currently operating nuclear power plants are light water reactors (LWRs) using ordinary water under high pressure as coolant.
  • Heavy water reactors use deuterium (isotope of Hydrogen) oxide which has identical properties to ordinary water but much lower neutron capture.

Additional Information

Parameters for a good coolant:

  • Must have efficient heat transfer properties.
  • Should be chemically stable at high temperatures and pressure.
  • Should be non-corrosive and a poor neutron absorber.

Some common Nuclear reactor coolants:

  • Water, Liquid Sodium, Helium, Carbon Dioxide, Deuterium oxide, etc.

Related Questions

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