> Unfortunately its just a small boiling water reactor.

It is not just a small boiling water reactor. It is a 300 MW-electric boiling water reactor, and if successful, it will be followed by 3 more of the same type for a total of 1.2 GW-electric. That is more than an AP-1000 reactor, and much less risky.

> Larger reactors are needed.

Genuine question: Why? Why not many smaller reactors? Small modular reactors seem pretty neat.

Is there an efficiency loss/total cost difference with smaller reactors?

I mean, Ontario runs the Bruce nuclear plant which is the second largest in the world in terms of the power it generates at 6,610 MW, Japan gets the top nod with a plant that generates 7,965 MW.