function findReactors()
  local numReactors = 0
  for address, _ in component.list("br_reactor") do
    reactors[address] = {component.proxy(address)}
    numReactors = numReactors + 1
  end
  print("Found " .. numReactors .. " reactor(s) at: ")
  for address, proxy in pairs(reactors) do
    print(address, proxy[1][1])
  end
  os.sleep(2)
end