104 Chernobyl Disaster - One Minute History

Soviet engineers conducted a safety test at Chernobyl's Reactor 4, but due to untrained staff and protocol failures, a nuclear explosion occurred, contaminating a vast area. Firefighters and safety personnel worked to extinguish the fire, facing lethal radiation exposure. By December 1986, a sarcophagus was built to contain the reactor, and in 2017, an additional structure was added to aid in cleanup efforts, scheduled for completion in 2065.

What was the main task assigned to the Soviet engineers at Reactor 4?

What happened when the test supervisor failed to follow protocol?

How long did the reactor core fire burn?

What measures were taken by December 1986 to contain Reactor 4?

What is the purpose of the additional structure built over the sarcophagus in 2017?