“[The Kremlin, Moscow: Legasov and Ulana Khomyuk explain the consequences of a nuclear meltdown with full water tanks] Ulana Khomyuk: When the lava enters these tanks, it will instantly superheat and vaporize approximately 7,000 cubic meters of water, causing a significant thermal explosion.…”Tagged: Chernobyl, Nuclear Reactors, Uranium, Fission, U-235