First of all, I like your design!! But as a "contrary" man... I can´t see a manner to justify a Salide nuclear icebreaker, or several more (even conventional ones)... If I recall clearly, Salide is a not to big archipelago 200 miles off Ireland, that your are doing your best to keep it from being "biggest and baddest"...
Russian nuclear icebreakers fleet had to support commercial shipping on northern routes almost round the year, and going nuclear can be a great advantage in terms of endurance & power there... (By the way, according Wikipedia Taymyr class nuclear powerplants were installed in Soviet Union, after delivery from Finland) But as far as I know, all you need an icebreaker for is to support scientific research and resupply their bases in the Arctic/Antarctic, and that can be done perfectly on a seasonal basis with a conventional one (a couple, at best), or even ice-strengthened polar supply ships, as all others do...
Although nuclear propulsion has his advantages, it has many disadvantages also, including requiring special cares on security, safety, support facilities and equipment, that sure will be prohibitive for a single ship or a small fleet...
By the way, pure icebreakers generally have poor seakeeping on open seas, so why not a Double Acting Ship or something like that for the long Salide-Antarctica journey?
And once you have adquired the maritime nuclear propulsion know-how, I think you will have to handle with a large number of Navy admirals knocking your door round the clock, to give them al least a couples of nuclear subs (in which the advantages of travel submerged for long periods is a big plus).
As I said before, I like your design, but it doesn´t fit in Salide for me...