Emissions: those are present (now) emissions. The paper I quoted (read above) is about future emissions (median up to 110g CO‐eq/kWh by 2050), bumped up by lowering ore grades.

Recycling: however breeders are AFAIK the most efficient way to tackle this (however it is so difficult there is no adequate industrial reactor, after ~70 years of prototypes and research). Other ways don't seem very appealing, for example France ceased to recycle in 2013.

Yes, since the 1980's a fair amount of Grand Plans aimed a extracting uranium from seawater. Nothing industrial yet. I won't hold my breadth.