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by man8alexd 51 days ago
For the rundown test, after the valve cut-off, it is irrelevant whether the reactor was shut down or not. The working plan for the test only specified that it was supposed to run before a planned maintenance period, so the shutdown was implied. During previous tests, the AZ-5 signal was wired to the valve cut-off signal and was sent automatically at the same moment. It is not clear why this changed in 1986, but the outcome would have been the same if AZ-5 had been pressed 35 seconds earlier.
1 comments

Can you point to anywhere in INSAG-7 where they talk explicitly about that? Because if not your point about the show ignoring INSAG-7 falls a bit flat.
This information is not discussed in INSAG-7. It is from trial testimonies sourced from the book by Nikolai Karpan (deputy chief engineer of Chernobyl NPP), who was present at the trial and made notes himself.