I don't see a future for this. If somebody thought it was a feasible design for construction in Western countries, they could buy the half completed sites at Summer for a song.
I also think 300MW is too big. It's not really small enough to get the supposed benefits of small and modular.
The entire nuclear industry appears to be off its rocker when it comes to designs that are possible to construct for any reasonable amount of money. They bungled the AP1000 so badly that it bankrupted Westinghouse, and there's no reason to believe that they learned enough from the experience to do better next time. It's all terribly depressing, and completely soured me on the possibility of nuclear for the next 20-40 years. And in 20-40 years, look at how far storage, wind, and solar will have developed. It's unlikely that my nuclear will ever be a dominant energy source.