Power Systems
The function of reflector is to

 stop the chain reaction.
 none of above.
 reduce the speed of the neutrons.
  bounce back most of the neutrons that escape from the fuel core.

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Power Systems
Gas coolled reactor

  both B and C.
 use coolant at pressure of 14-28 Kg/cm2 and at temperature of 700°-800° c.
 use CO2. or helium as coolant and graphite the moderator.
 use heavy water as coolant as well as moderator.

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