Curious if in the days researching fission if they were as optimistic about it being safe. If it doesn't exist yet how can anyone say that it is safer, cleaner, endless power. Obviously the researchers aren't going to promote the possibility of the technology causing it's version of a meltdown or a bomb. "Endless energy" is going to get more funding then "blow-up planet"
Generally as energy density improves the size of an oops goes up. (Rocket fuel>gasoline, Lithium Batteries>lead acid, nuclear>coal) Clearly I don't want to do away lithium batteries, rocket fuel or nuclear power but they should be upfront about the risks.
It sounds like the reaction gives off helium. Once the atmosphere fills with helium, do we really want to live in a world with everyone talking like chipmunks?