Pacific Northwest National Laboratory

Chernobyl Nuclear Reactor Is Permanently Entombed With World’s Largest Movable Structure

April 26 was the 31st anniversary of the massive and world-changing explosion at the Chernobyl Nuclear Power Plant’s Unit 4 reactor, back in 1986, which shifted how the world sees nuclear energy. In November of 2016, the power plant was permanently entombed in the world’s largest movable structure, a massive steel arch which was slid over the reactor.