Upgraded power armor requiring Power Armor mk2 as part of the recipe along with Uranium Fuel Cells. 12x12 grid +40 inventory and defenses that step up about the same rate as previous armors. As one would expect research into nuclear is a prerequisite.
You first create an un-powered shell, then place it into a centrifuge along with uranium cells to craft the final usable armor.
v1.3.1 = updated for 0.18
v1.2.1 = updated for 0.17