Nuclear Furnace with nuclear fuel makes smelting much faster;
the mod adds special "burnt extractor inserter" for removing "used up uranium fuel cell" from this furnace.
It was added as balance for miniaturization: instead of huge nuclear plant and big cluster of electric furnaces, only one entity with nuclear smelting. I'm sure, it's not very ecologic to smelt ores direct on the nuclear core.
I'm trying to use the mod with the special extractor and it won't extract the used fuel cells. I tried running the command "/c game.player.force.recipes["extractor-inserter"].enabled=true" and it's still not working. Any ideas?
nm: Found it. Might want to make a not in the Information page that there's a special extractor in addition to the picture that shows it. Because I'm an idiot who didn't check the pictures.