... was vastly overblown in the show (megaton explosion WTF ??!!). BUT they did not invented that mistake out of thin air: it was mentionned long before the series - well even at the time of the disaster since they send that "suicide squad" closing the vanes and emptying the pool of water.
WWII after WWII - Why there is a WWII vehicle at Chernobyl
Covers a story I was not aware of either at the time or later, and goes into some of the other vehicles that have been misidentified as veterans of WWII called back into service.