Not Antarctica but pretty close to the other end, this thing is being towed up there at the moment: https://en.wikipedia.org/wiki/Akademik_Lomonosov https://en.

Not Antarctica but pretty close to the other end, this thing is being towed up there at the moment: https://en.wikipedia.org/wiki/Akademik_Lomonosov https://en.wikipedia.org/wiki/Akademik_Lomonosov (it's a fairly traditional PWR, though, so nothing new technology-wise per se)