Power Systems
In boiler water reactor (BWR)

 there is danger of radioactive contamination of steam.
 enriched uranium is used as fuel.
 the feed water acts both coolant and a moderator.
  all of above.

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Power Systems
The factor affecting run off are

 rain fall pattern, shape and size of catchment area.
 the topography and nature of soil in the catchment area.
 amount of vegetation and weather condition in the catchment area.
  all of above.

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