NavyRecognition reports on Russian icebreaker development. They have a diverse and very impressive program. Not content with the Arctika class nuclear powered icebreakers, they are now expecting to build even bigger icebreakers, the Project 10510 Leader class.
The Iceberg Design Bureau also is developing the world’s most powerful nuclear icebreaker of the Project 10510 Leader class. According to Ryzhkov, “its power is 120MW and its maximum ice-breaking capability equals 4.3 m, and if ice is 2 m thick, the ship can lead convoys at a speed of more than 11 knots, thus ensuring cost-effective traffic via the Northern Sea Route.”
120 MW, that is about 160,000 HP. That is about twice as powerful as the Polar Star.
There is a lot of interesting stuff in this post.
It is important to remember that most of these program are for the development of the Arctic for Economic purposes. That is not to say the Russians could not turn them to military purposes, but the Russians have ample reason to see them, not so much as military assets, but as economic necessities.