I don't claim to be an expert on nuclear power, so take what I say with a grain of salt, but from what I've seen, smaller reactors don't seem to make much sense. The trend seems to be towards bigger reactors with bigger power output. Some of it thanks to the bureaucracy of getting permits per reactor, but also the physics, engineering, real estate and economics involved. Conventional (i.e. existent) reactors are typically a fairly small part of a nuclear power plant's footprint, so no matter how much you miniaturize them you will have the overhead of security, operations, cooling and electrical infrastucture.

If someone can fill me in on the benefits of smaller, more modular nuclear reactors and how they might outweight those of large installations, I'm interested.