1.8b will be out soon, which will, as far as I know, fix a bug where the steam decompressors were crashing when connected to some types of fluid pipe.
For now, I will paste a message I posted on GitHub to someone asking about turbines in the mod - I think sgbros1 will be happy
"Currently there is a temporary system in place involving steam and denser forms of steam that needs to be decompressed.
After I've updated the mod to MC 1.10, I want to have a different type of fission reactor in the game. The RF-producing one (passively cooled) will, as ever, require fuel cells of solid fissile material to run.
I plan on having a steam-producing reactor which requires molten salts of fissile material as fuel (a molten salt reactor). These fuels will require more work to create (more intricate processing system, involving fluorides, centrifuging etc.), but the reactors will overall produce more power (perhaps roughly 75% more power).
The structure of the actively cooled, molten salt reactors will be similar to the passively-cooled ones, except for obvious differences such as ports for water/steam input/output and the passage of the molten salt.
I haven't quite figured out exactly how the steam turbine generator should look or function, but I have two options. Either I go for a BR or Mekanism style turbine, which is essentially a big multiblock with a big, in-world turbine at the centre, or I go for a GregTech or Railcraft style turbine, where a multiblock is built, and then a turbine is placed in a GUI. Personally, I'm leaning towards the latter, because it gives me much more freedom when it comes to the interior structure of the turbine multiblock, but I will set up a poll on the Minecraft Forum thread and see if there's a clear favourite
"
On top of this, I would like to say there could be up to
25 new fission fuels in version 1.9!