During the Chernobyl disaster, Alexei Ananenko, Valeri Bezpalov, and Boris Baranov were tasked with preventing a potentially disastrous steam explosion, by opening the sluice gates to drain a bubbler pool. (AP report)
Many sources have the three dying soon after (≈ 2 weeks) to radiation poisoning. Notable among them, the docudrama "Surviving Disaster - Chernobyl Nuclear". Another is: Catastrophe: A Guide to World's Worst Industrial Disasters.
Chernobyl 01:23:40: The Incredible True Story of the World's Worst Nuclear Disaster, on the other hand, claims they didn't die of radiation poisoning, and two of them are alive today (the third dying long after the incident, in 2005). Both the book and wikipedia cite this article from souzchernobyl.org.
So, did they die of radiation poisoning, or not?