Baird Maritime has a review of the new Russian nuclear powered icebreaker Arctika. Its total shaft horsepower is about 80,000 (not a lot more than Polar Star’s 75,000). It open water speed of 22 knots is high for an icebreaker. The crew does seem to be remarkably small at 54 (31 less than Healy). An earlier more extensive post on these ships with some interesting comments here.