This is my first published creation, It is a self sustained plutonium reactor. While it dosnt use the heat for anything as of yet, it has a 0% fail rate, and if for some reason it does fail there is a safty system in place to stop a total meltdown. Nothing special, and still a work in progress, but with no failure rate its still pretty cool. Also includes a DEUT plant.
You might have to be careful. Unless it's a feature now, not a bug, the LAVA will cool into STNE when someone get's to fixing it. You might be able to wire up a portal and make a waste dump easily, however.