A Swedish company innovating in the nuclear space: https://www.leadcold.com
I'm torn however, on one side its a reasonable proposal that will yield waste far far less dangerous, on the other side, it distracts from investing in renewables.
The waste produces by every reactor current in production or planed is a huge problem that is greatly underestimated by the general population.
Sweden have for 30 years tried to figure out a way of storing the waste and still not have a finalized plan, and we have one of the best places to store it, stable bedrock with very little seismic activity....
Read more here about the plans for the Swedish storage: http://www.skb.com