![Philip Grossman on Twitter: "in Nov 2011, the first work on new Sarcophagus began with the installation of a smaller vent stack. You can see the workers welding in protective gear. @clmazin @ Philip Grossman on Twitter: "in Nov 2011, the first work on new Sarcophagus began with the installation of a smaller vent stack. You can see the workers welding in protective gear. @clmazin @](https://pbs.twimg.com/media/D8I_9T1WsAAtfb8.jpg)
Philip Grossman on Twitter: "in Nov 2011, the first work on new Sarcophagus began with the installation of a smaller vent stack. You can see the workers welding in protective gear. @clmazin @
![Dismantling of the ventilation stack (2013). Steam discharge pipes of Unit 2 in the foreground. : r/chernobyl Dismantling of the ventilation stack (2013). Steam discharge pipes of Unit 2 in the foreground. : r/chernobyl](https://preview.redd.it/jdwtkniku0p61.jpg?auto=webp&s=170a1a97f62b1eff45cb3f8a9b87c42a00053d9b)
Dismantling of the ventilation stack (2013). Steam discharge pipes of Unit 2 in the foreground. : r/chernobyl
![File:The ventilation stack of the damaged unit 4 reactor at Chernobyl (02710157).jpg - Wikimedia Commons File:The ventilation stack of the damaged unit 4 reactor at Chernobyl (02710157).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/3/3c/The_ventilation_stack_of_the_damaged_unit_4_reactor_at_Chernobyl_%2802710157%29.jpg)