1: Water/steam
The whole point of using 2x Tesseracts is having one channel for steam and one channel for water and thereby recycling the water from the turbine back into the reactor. The Fluid Ports on both Reactor and Turbine can be set to both Input and Output to match this. This saves the MASSIVE lag monster of Transfer Nodes that you have created. Reuse the water and you can use a single non-upgraded Transfer Node or a Aqueous Accumulator to fill the water network initially.
2: The reactor setup
Your internal reactor setup looks to be very poorly optimized. And it is a VERY large reactor for a single turbine.
Something more optimal for a reactor of the size you have there would be something like this:
http://br.sidoh.org/#reactor-design...olRodInsertion=21&layout=O3COC3X2C3X2C3XCO3CO
But this requires a steam consumption of 6-7000mB/t to really be at optimal efficiency. In your case(one turbine only) it would have to run with +76% control rod in which case the reactor gets too cold to be efficient.
You would have to build a smaller reactor to try and get it hotter(towards the optimum temperature of 1000C) with just one turbine, but limitations in the mod rather prevents that. Therefore I would suggest at least 2-3 Turbines for any reactor.
3. Turbine
The way the turbine is built determines its mB/t usage at which RPMs. So if you want to match a Reactor with your Turbine(s), then it is important to choose the right design for your Turbines.
Specially since is VITAL that your Turbine runs stable at either 900 or 1800 RPM as it will produce MUCH more power at these values.
I don't see any mention of the stats of your turbine or which materials you are using, but this spreadsheet will give you a list of stable builds/settings:
https://docs.google.com/spreadsheet...TUxOUGxMRlpERWtPMmtGT213bmc&usp=sharing#gid=1
4. Preventing Steam buildup in reactor
One of the things that causes the most heat buildup in a actively cooled reactor is when the steam buffer fills up. This is what I do to prevent it:
Once you have built your turbines, set the mB/t to the precise amount found in the list I posted(or value you know from elsewhere). Now slowly increase the Control Rod in the reactor point by point until you find the exact point where the buffer starts emptying out. At this point the reactor no longer produces enough steam, so reduce the Control Rod back one point again. Now go to the turbines and increase the mB/t by 20-30 points or so. This should increase the RPM to slightly over the 900/1800(which is actually also what many suggest) and empty the Steam buffer out.
I like using this CC script(with its automation set to disabled) to modify the Control rods as it allows for 1% interval adjustments as well as easier overview:
https://github.com/sandalle/minecraft_bigreactor_control
Oh and btw: No wonder that reactor is running hot. With that internal setup and only extracting 2000mB/t, it should be set to 83% control rod