Sorry I'm an idiot, but I can't find anything that explains what "Running Cost" means in these reactors, and why it's expressed in UU-Matter units. Help?
Running cost is what you need *other than uranium* each cycle to run the reactor.
UUM costs are there in order to give comparison between different costs, or so you know what it will cost to automate the creation of the parts.
Okay, so that just reflects the cost of the extra copper, etc. that is needed each cycle. Just wanted to make sure I wasn't supposed to be putting UU-Matter somewhere...