> I hope they can find a way to bring fuel costs way down.

I've spoke with some researchers and investors working on seawater uranium extraction and left quite optimistic.

Extracting uranium from seawater gives you natural uranium, which needs to be enriched for use in most power reactors. The reactor under discussion here needs higher uranium enrichment and more expensive fuel fabrication operations than common power reactors. Developing uranium extraction from seawater is a good long-term insurance plan for uranium availability, but it's not going to help this reactor get its fuel costs down.