[MERGED PR] Nucular Fishin' Engine

[ohjoy]

I like this! Some feedback:

• Why a new fuel rod item? Why not just let people make rods directly (with metal/etc. sheets) and slot them in?
  
• Neutron Moderators are important in nuclear reactors but I didn't see any mention of them in the design doc. Making the reactor a big container might be good enough. It would be cool if chemicals besides Water had different effects (e.g. Radium produces passive power but makes it easier to meltdown, etc.) The TEG uses viscosity, maybe you could use something else like heat capacity?
  
• It would be nice if a meltdown was less "Nuke time, I win" and more "Catastrophic levels of radiation", like the random event, even more than the black hole's. A TEG failure burns you alive, a singuloose eats the station, I think it would be appropriate for a meltdown to emit unbearable amounts of radiation, a kind of disaster trinity. Maybe with just a bit of explosions and heat as a treat, since you are including piping.
  

I don't have anything to say about how the power will be calculated since I'm not familiar with the inspirations you listed.
Overall, it looks great so far!