The Chernobyl sarcophagus which has long contained the fissured reactor core is at risk of collapse, writes Claire Corkhill. The solution: build a pair of tracked arches 260m wide and 100m high, and slide them over the site to enclose it for a century to come: so creating a sealed space for robots and remotely operated machinery to deconstruct the reactor and sarcophagus piece by radioactive piece.
