Every nuclear icebreaker Russia and the Soviet Union have built, from commissioning to retirement. The first Arktika-class ships lasted between 15 and 33 years; the Project 22220 hulls are built for 40.
Dates from Wikipedia: Lenin (Russian article), Arktika-class icebreaker, Taymyr (1987 icebreaker), Nuclear-powered icebreaker (Vaygach), Sevmorput, Project 22220 icebreaker, Project 10510 icebreaker. Chukotka, Leningrad, Stalingrad and Rossiya end at their planned delivery years. Eight in service as of late 2025 (gCaptain, December 2025).