Comment by consumer451

The only thing that I've seen on the topic is this:

> Results reveal that water-, molten salt–, and sodium-cooled SMR designs will increase the volume of nuclear waste in need of management and disposal by factors of 2 to 30.

> ... In addition, SMR spent fuel will contain relatively high concentrations of fissile nuclides, which will demand novel approaches to evaluating criticality during storage and disposal.

https://www.pnas.org/doi/10.1073/pnas.2111833119