Just thinking out loud here, if "small" means submarine and aircraft carrier power supplies, then that descriptor might be subjective as compared to a 100 acre sized compound. Not so much as being small as in 10 x 10 x 10 sized room. Unless they plan on making it a basement install kind of thing.
As I noted upthread - the naval power plants Lockheed currently makes are characteristically about 30' to 40' on a side.
This power plant is supposed to fit on a large truck - 7'x10' are the characteristic measures they've suggested. So, a third to a quarter of the size in each dimension - one ninth to one-sixteenth the total volume of what's on a naval vessel.
I wouldn't expect it to be a "basement install" in a home - there's no home that needs 100 megawatts of power. But, havign it fit on a truck to ship it out to towns that have lost power to storm or other disaster seems to be one idea for using the thing.