This is a question more than anything else.
I looked in the configs and I noted that there wasn't the old option for reactors to output steam instead of EU in the presence of Railcraft. Does that mean that reactors are EU only?
At the moment the steam production for reactors do not exsist.
The config about that is crap anyway because it is only supporting 1 side of players.
The other side has to life that...
But to give you some more details here some info what will come:
But first look sometimes into the issutracker there are also some feature ideas stored and i accept (or request) opiniens.
So now to the reactor: There will be a steam reactor that only produces steam. That also depends on the reactor setup and the flow of fluids.
That will also have special componnents for that, and maybe you can use the standart reactor planner V3 for that^^" Not sure yet.