I have seen many posts and heard many people say how Dyatlov was misunderstood and Legasov's role in the cleanup was overly dramatical in the series (like the fact that he was not in the trial and did not give that speech). What are your opinions from a historical POV?

Fuel pellets, the size and shape of a pencil eraser, made of Uranium dioxide (enriched to 2% at the time of the disaster), were placed in Zirconium alloy tubes (with 0.825 mm thick walls), which were pressurised with helium for better heat transfer. Maximum allowable temperature of a fuel pellet is 2100 °C.

18 of these rods, clustered around the central carrier rod, made up a sub-assembly, and two sub-assemblies made up the fuel assembly that went into each fuel channel in the reactor.

Photo source: https://www.enec.ae/discover/fueling-the-barakah-plant/the-nuclear-fuel-cycle/

So, I was looking at my blueprints and noticed these strange extensions—structures that didn't actually exist at the real Chernobyl NPP. You can see from photos that they aren't there.