I'm not sure in this instance, but for industrial plants, the expectation is for them to run 24/7/365 without disruption. They're not designed to be turned off

I'm not sure in this instance, but for industrial plants, the expectation is for them to run 24/7/365 without disruption. They're not designed to be turned off and then on again. When you shut something down, how do you "reset" it to a clean state so production can start again? Think about all the existing stuff still in the pipes, residual, etc.