Power Systems
Highest pressure generating pump inside the thermal plant is

 high pressure heater
All of these
 boiler feed pump
 low pressure heater

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Power Systems
A sodium graphite reactors use

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

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