test.lua

-- test
local reactor

function reactorSearch()
 local names = peripheral.getNames()
 local i, name
 for i, name in pairs(names) do
  if peripheral.getType(name) == "fissionReactorLogicAdapter" then
   return peripheral.wrap(name)
  end
 end
end

reactor = reactorSearch()

if reactor ~= nil then
    local minPercentageToStart = 20 -- 20% minimum
    local currentWastePercentage = math.floor(reactor.getWasteFilledPercentage() * 100)
    local a = currentWastePercentage <= 90
    print('currentWastePercentage',currentWastePercentage, a)
    local coolantFilled = math.floor(reactor.getCoolantFilledPercentage()* 100)
    local b = coolantFilled >= minPercentageToStart
    print('coolantFilled',coolantFilled, b);
    local fuelFilled = math.floor(reactor.getFuelFilledPercentage()* 100)
    local c = fuelFilled >= minPercentageToStart
    print('fuelFilled',fuelFilled, c);
    local currentTemp = math.floor(reactor.getTemperature())
    local d = currentTemp < 800
    print('currentTemp',currentTemp, d);


    local canOperate = a and b and c and d

    print('can operate',canOperate)

end

local alarmPos = "back"

redstone.setOutput(alarmPos, true)
redstone.setOutput(alarmPos, false)