Remote Reactor Control (RRC)
Whenever you hold it at your hotbar, it will send you a text message on your chat, whenever reactor it is linked reach critical heat(or above a previously set one)
and you must right click it to force deactivate/activate from distance.
Press M while holding it to get all reactor statistics:
EU/t
Efficiency
Connected to redstone/redalloy (Yes/No)
Heat / Max Heat
Heat produced per reactor tick
Time until critical / Time until BOOM
Cooldown time if shutdown at that moment