Power Systems
A hydro power plant of run off river type should be provided with pondage so that the

 kinetic energy of the running water is fully utilized.
 pressure inside the turbine casing remains.
 operating head is controlled.
  firm capacity of plant is increased.

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Power Systems
Gas coolled reactor

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

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