From 2007 to 2018, Bouygues Travaux Publics and Vinci constructed the confinement shelter for the reactor of the Chernobyl nuclear plant, in Ukraine. The colossal structure (measuring 108 metres in height and with a frame weighing 23,000 tonnes) has a projected lifespan of 100 years. It allows  dismantling the damaged reactor that was responsible for the disaster in 1986. All the workers involved in this project received increased medical monitoring, and have been issued with specific protection equipment.