You pump cold COOLANT into a hatch of your 5x5 reactor. You pump hot coolant out into a fluid heat exchanger (either the GT or IC2) one. They output cold coolant which you put back into the reactor.I'm starting to look into fluid reactors. I built one (well at least the reactor housing with the reactor and chambers inside. I have no clue how to get water into the thing, and when I pull it out I don't know what I'm supposed to pull it out into.
In theory you could probably cheese right through the entire nuclear age with a bunch of farms and boilers, yeah.I mean if the whole point of a liquid reactor is to create steam that I can then use in a turbine, I'm already doing that. And I can do it even better. Pretty soon here I'll be able to build a large tungstensteel boiler. My alumentum production is one alumentum every 2 seconds and I currently have a level 6 JABBA barrel full of it.
If and when pollution completes to my liking, that won't be so simple. Treefarm/charcoal power will be "dirty" and you'll get to a point where it makes sense to consider upgrading techs.