Thermal water reactors can be designed to run on either U-235 or Pu-239. To produce 1000 MW of electricity, does a thermal water reactor have to consume more U-235 or Pu-239? What is the ratio of the...

Thermal water reactors can be designed to run on either U-235 or Pu-239. To produce 1000 MW of electricity, does a thermal water reactor have to consume more U-235 or Pu-239? What is the ratio of the masses of these materials required to produce the same amount of power?