These facilities are expensive, like 20-30B for the big ones. If you’re curious youtube has some good long videos on how these places work. As far as I’ve checked all the gov grants given to companies as incentives (whether chips or energy or other infrastructure projects) only partially cover the costs of construction.
1500T TNT is equivalent to 15KT and then 240KT is 16% of 1500. Comes out to 2.4KT?