So basically, the battery-powertrain efficiency is about 3-4 times better than with diesel. You need 3-4 nuclear plants worth of energy now.
But lets see about your math as well.
One reactor (of which there may be several in a plant) is lets say 1GW.
The semi will charge at say 1MW. So 1000 of them can charge at the same time. It takes about 1 hour to charge the battery so we are already at 24000 charges per day. Each of them can cover ~800km so about 19 million fleet km or 480 trips around the earth or about 25 round trips to the moon.
But lets see about your math as well.
One reactor (of which there may be several in a plant) is lets say 1GW.
The semi will charge at say 1MW. So 1000 of them can charge at the same time. It takes about 1 hour to charge the battery so we are already at 24000 charges per day. Each of them can cover ~800km so about 19 million fleet km or 480 trips around the earth or about 25 round trips to the moon.