Since 2012, the confinement shelter that will cover the existing sarcophagus has been taking shape at the Chernobyl site.
Built by the Novarka consortium, which comprises VINCI Construction Grands Projects (lead company) and Bouygues Travaux Publics, the metal arch is 108 metres high (equivalent to a 30-storey building) and 162 metres long and has a span of 257 metres. It is being assembled in an area located at a distance of 300 metres from the reactor to protect the teams from radiation.
It will be equipped with a dismantling tool that will be displaced by overhead travelling cranes attached to its ceiling, and it will, when assembled, be slid over the sarcophagus by hydraulic jacks. All work complies with very stringent radiation protection rules subject to the ALARA (As Low As Reasonably Achievable) principle, which apply across the entire nuclear industry and sets a maximum annual dose limit per worker.