Thank you. Does operating suggest that the reactors were not put into operation, they are not in work now while operation means that they are in commission and work?Hi esperansa. If you have reactors and you want to discuss whether or not to operate them you would consider the risk of their operating. Here "operating" is a gerund. If you want to discuss the continuing process of running the reactors, you would probably talk about their operation. "Operation" of course is a noun.
Yes. "The machine is relatively simply but the operating of it is difficult."Can you consider operating as a noun?
The general answer is "No. No they cannot."Can two words be interchangeable?