I'm not literate at all on nuclear physics, but I remember in the "Chernobyl" TV show (which seemed trustworthy) some divers died after going in the cooling water to close the pumps. How was that water different ?
I watched the show but if I remember correctly they actually didn’t die. They survived.
> The reality is much more positive than the myth, with all three men escaping such a grisly fate. Indeed, Alexei Ananenko and Valeri Bespalov are believed to be both still alive as of 2024, while Boris Baranov lived until 2005 when he passed away from heart disease.