Components have to be in reactor to cool down. My tests say so.
That's what I thought, thanks
Somehow it sounds ot to build a reactor just to cool down components
Sure, but if you want to do several cycle in a row without letting the components cooldown, it's one way to do it.
Still this would mean that you could create a reactor surrounded with lava that even does not cool down if there is nothing inside it. Funny^^. Maybe use a lever to drown the reactor in lava (problematic since lava doesn't vanishs as easy as water). But fire with nether-rack should work (easy to lit with rp-deployers).
Humm... You could probably do (with some effort) an air cooled neutral breeder with pistons to push blocks and lava to keep it warm when not in use. That be tricky and probably not really neccesary, but it would be cool! (or hot if done right! )