A Coggle Diagram about After years of planning, the construction of the new arch began in 2012. The arch is what exploded and had to be demolished. Radiation levels at the sarcophagus are still unsafe, but the arch is being built 1,00 feet away from the damaged reactor., As the workers prepare to seal the heart of their power plant beneath the new arch, wildlife scientists are studying the effects of the 1986 disaster on animal populations nearby. They've found some signs. , Technicians are nearing a completion of a 1.5 billion giant steel arch that will seal the ruined reactor for a century or more. It's planned to be taller than the Statue of Liberty and the area of the size of 8 football fields. It's one of the most amazing engineering projects ever., Nuclear tragedy in Chernobyl, Tons of emergency responders and workers tried to contain the burning reactor received too much radiation and died within few months of the accident. , The power station became unstable and exploded. It's blast killed a worker immediately and injured another worker. and Some people think of Chernobyl as a radioactive wasteland. But it's not. The levels of radiation in the environment dropped rapidly in the months after the explosion. Even if it's still too contaminated for humans. Radiation limits for people are strict so it could be centuries before the area is declared "safe".