A redstone signal to a redstone port will disable the intake of new fuels.

Any fuel pellet that has already started burning needs to be finished before the reactor will fully shut off with a redstone signal to a port.

The port can also be used with a comparator to output data. It has 3 modes:

• Temperature: Outputs signal based on the hottest component temperature (relative to the maximum reactor heat)
• Active Rod Count: Indicates the number of rods burning fuel (for example, the actual number of rods per layer that are currently active. Double and quad rods are counted as one.)
• Energy: Measures current RF stored

To cycle between the modes, simply right-click the port.

For detailed information on reactor mechanics, see the nuclear reactor guide.