Transplutonic adds a complex chain of nuclear fuel reprocessing and other interesting production challenges
Mods introducing new content into the game.
Things related to oil and other fluids.
Furnaces, assembling machines, production chains.
Changes to power production and distribution.
What the title said. It'd make sense for it to return the components for making the empty one instead. Otherwise one can turn steel, iron and concrete into uranium and the rest of the stuff one gets from nuclear waste.