Modular and easily expandable? Yes. But small? No.
And for anyone who thinks the rapid development of AI and its data centers can be slowed down, consider that the DOD, military-industrial complex, and intel community will be big users of AI and AI will be important to national defense.
There are models that fit a "standard" shipping container. Others may take several "container modules" to make up a full reactor. I am sure the market will sort it out.