@f9408be4 
No problem.

Now, if/when I talk about how back in High School, the University-Track Math/Physics/Chem students would talk about various "reactor designs", you won't think I'm either insane, or making things-up.

We were, at that time in the 80s, working-on ideas related to liquid-metal compound cooling-loops for reactors, and safety systems.

And we all knew that it was stuff that we weren't to be talking-about. 

I enjoy seeing where it's going.

Have a few friends in it.