Power Systems
Advantages of shunt compensation is/are

 It requires less maintanance
 smooth voltage regulation is possible by controlling excitation
All of these
 single unit can be used as both capacitance and inductor by adjusting the excitation

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Power Systems
A sodium graphite reactors use

 a mixture of sodium and graphite as moderator.
 a mixture of sodium and graphite as coolant.
  sodium as coolant and graphite as moderator.
 sodium as moderator and graphite as coolant.

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