This is how scientists are keeping Chernobyl’s radiation contained

https://www.washingtonpost.com/news/worldviews/wp/2016/04/25/this-is-how-scientists-are-keeping-chernobyls-radiation-contained/

Chernobyl Nuclear Reactor Readies for New Containment Barrier

A workforce of around 2,500 is finishing a massive steel enclosure to cover the melted down reactor for at least a century

http://www.wsj.com/articles/chernobyl-nuclear-reactor-readies-for-new-containment-barrier-1461538427