Power Systems
The load current in short circuit calculations are neglected because

 both 1 and 2
 nether 1 nor 2
 short circuit currents are greatly out of phase with load currents
 short circuit currents are much larger than load currents

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Power Systems
The power level of nuclear reactor can be increase by ( K = multiplication factor )

  raising the value of K above 1, but later bringing it back to K = 1.
 lowering the value of K below 1 but later bringing it back to K = 1.
 lowering the value of K below and keeping at that lowered value.
 raising the value of K above 1 and keeping it at raised value.

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