1. Boiler
  2. Direct cycle of coolant system
  3. Double circuit system of coolant cycle
  4. Multi passes system
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1 Answers

Answer: Option 3

Fast breeder reactor uses Double circuit system of coolant cycle fast reactor uses a coolant that is not an efficient moderator, such as liquid sodium, so its neutrons remain high-energy. This plutonium isotope can be reprocessed and used as more reactor fuel or in the production of nuclear weapons.

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