A 500 MVA, 20 kV, 60 Hz synchronous generator having direct axis subtransient reactance X’’ = 0.20 pu is supplying a purely resistive load of 400 MW at 20 kV. The load is connected directly across the terminals of the generator. If all 3 phases of load are short circuited simultaneously, then symmetrical RMS current (pu) in the generator on its own base will be