One very good advance in nuke power are pebble bed reactors. They're design incorporates a passive safety mechanism that greatly reduces the need for redundant active controls. From what I've heard, they would be practically impossible to meltdown, even if you were trying to do so.
The concept may have some potential, but at this point, there are some major technical issues that need to be overcome as well as finding a way to make the design commercially viable. One thing for sure, it is not some magic bullet.