NukeControl

n1 = peripheral.wrap("nuclear_reactor_1")
n2 = peripheral.wrap("nuclear_reactor_2")
n3 = peripheral.wrap("nuclear_reactor_3")

local slots = {}

slots[1] = 1
slots[2] = 2
slots[3] = 10
slots[4] = 11
slots[5] = 19
slots[6] = 20
slots[7] = 28

function fuelRod()
    for i,j in pairs(slots) do
        print("Checking...")
        if not n1.getStackInSlot(j) then
            n1.pullItemIntoSlot("down", 1, 1, j)
            print("Refill: "..tostring(j))
        end
        if not n2.getStackInSlot(j) then
            n2.pullItemIntoSlot("down", 1, 1, j)
            print("Refill: "..tostring(j))
        end
        if not n3.getStackInSlot(j) then
            n3.pullItemIntoSlot("down", 1, 1, j)
            print("Refill: "..tostring(j))
        end
    end
end
while true do
    fuelRod()
    sleep(600)
end