The Aker ARC 124 vessel will be completed by the end of November, 2018, PortNews said.
The order was first said to be in its final stages last October.
Atomflot will operate the vessel in the Yamal LNG field.
Russian nuclear agency Atomflot will spend RUB 6bn ($115m) on a new icebreaker at Vyborg Shipyard.
The Aker ARC 124 vessel will be completed by the end of November, 2018, PortNews said.
The order was first said to be in its final stages last October.
Atomflot will operate the vessel in the Yamal LNG field.