Hi trevor. All the fears you mention about nuclear have been addressed In the 'Back Yard Nuke' according to the inventors.I know it's explained in the Abundance book,but I couldn't find the particular reference when I was writing the post.But I'll look again now.

I quote -'Nathan Myhrvold founded TerraPower to develop the travelling wave reactor (TWR).A generation - IV variation that he calls "the worlds most simplified passive fast breeder reactor.

It has no moving parts,can't melt down,and can run safely for fifty-plus years,literally without human intervention.It can do all this while requiring no more enrichment operations,zero spent-fuel handling,and no reprocessing or waste storeage facilities.

What's more,the reactor vessel serves as the unit's (robust) burial cask.Essentially,TWRs are a build,bury,and forget power supply for a region or city,making them ideal for the developing world.End quote

As I remarked in my reply to kenny earlier.Abundance was written 5 years ago,so I would have thought such an exciting development would have been more widely known about by now.