I went on an excursion there . Very interesting but noisy . Boilers and turbines work without stops and it can be very difficult to hear at least something . It is also very creepy to walk along partitions made of thin sheets of metal . They bend and spring so terribly . Intellectually, of course, you understand that they are not going to fall now, but still ..........
By the way, the passage is very strict, if you want to get on a tour, then make a list in advance in alphabetical order and if you forget to add someone to the list, he may not even come -it's useless, they won't let you in .