13.The sarcophagus entombed over 200 tons of highly radioactive corium lava 30 tons of highly contaminated dust and 16 tons of exposed uranium and plutonium.
18.A dozen or so operators dressed in military uniform were almost entombed by the rows of instruments, as though they were crouching inside battlefield trenches.
20.When finished, the 250-meter-wide steel arch is to slide 200 meters to cover the sarcophagus hastily built after the 1986 explosion to entomb Chernobyl Reactor Number 4.