Today I started playing Minecraft with mods.I'm using the "Technic Launcher" and "The 1.7.10 Pack" modpack. I came across "Big Reactors" and here are my questions:

  • Which is the best/most efficient setup of a passively cooled reactor?
  • Which is the best combo of actively cooled reactor and turbine (sizes and connection)?
  • Is it possible to automate enabling/disabling the reactor depending on the amount of stored energy?

Thanks in advance!

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    What exactly do you mean with "most efficient setup of a passively cooled reactor? – mabu Dec 20 '16 at 18:59
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    I thought about how big my reactor should be to start. Amount of control rods, height, width and depth. Also which coolant I should use. – yuri Dec 20 '16 at 19:01
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    All right... You could use the BigReactor simulator and try some configurations to find something that fits your needs: br.sidoh.org – mabu Dec 20 '16 at 19:03

To calculate the efficiency of a reactor you can use the BigReactor Simulator at http://br.sidoh.org/

I always start with a 3x3x3 reactor. Inside I place five fuel rods. For cooling I use "Gelid Cryotheum". Here you can see this configuration. I don't know if that is a good idea or not but I think it produces enough energy to power your machines.

Later you might want to power a turbine with your reactor. You need to provide water to the reactor which is used to make steam and power the turbine. You can place the turbine on top of the reactor. I often use a 5x5x10 turbine with my 5x5x5 reactor. As far as I've seen that's pretty much the best turbine size in combination with that reactor.

I think it is also possible to automate your reactor and turbine if you want to. ComputerCraft is the way to go. Unluckily I don't know a lot about that mod. I just found this helpful page on the computercraft forum. I hope this helps.


Mabu's answer is correct, but I have a very simple way to automate the reactor to only produce as much energy as you are using. It will never waste energy.

First put two redstone ports in your reactor. Set on of them to trigger when your reactor's internal buffer is below 50%, and set the other one to turn the reactor on. Then connect them with redstone. Voila! It's automated.

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