Doesn't mean you have to do it every day. CFS ARC is a 270MW reactor. In a month it will consume 13.5kg tritium. Current world tritium supply is 20kg, though we could produce more from fission reactors if we really wanted to. 13.5kg out of 2000 tons is 7 parts per million, but with a breeding ratio over one, more than that would be produced. Tritium inventory to start up the ARC reactor is 100 grams.