Originally shared on the public FactorioPrints / Factorio School archive (factorioprints.com · factorio.school). Authorship preserved from the public catalog.
j's Nuclear
Kovarex
Starter Kovarex and Fuel Cell ramp-up
Optimized for fast ramp-up of centrifuges with 50% of U-235 going towards fuel cell production as soon the first centrifuge is filled with 40x U-235
Note: First Kovarex-generated U-235 will only be returned once ALL centrifuges are fed with one set of inputs!
Tileable Reactors
10 tile x 292 tile footprint, tileable on the long edge
The horizontal large power poles are chunk-sized (32 tiles)
Fuel cells are LogiBot-Supplied
One standard water Pump can supply max 2 prints of FULL 2x2!
water supply in the middle via underground pipes
Starter 1x2 Reactor
Provides the smallest possible footprint for a 2x1 reactor design, good to kick-start power production but keeping the future footprint of the setup
Minimal 2x2 Nuclear
Provides the optimal ration of a 2x2 reactor for heat consumption and power generation possible.
FULL 2x2 Nuclear
Provides the maximal possible heat consumption for late game with multiple prints of the 2x2, due to additional neighbor bonuses
Changelog
2026-07-31
Created dedicated footprint blueprint that only holds the flooring for better map-view based mapping of area requirements
Frame now includes input water pipes in a tilable way, so it can be connected even before the reactors are built and propagates through
Added dotted lines for better map view to the floor tiles
Better organized sulfuric acid production into sub-book
Added full chain of nuclear fuel cells production and recycling via hy_speed's 1-2-1 train system, including train and unload station
Added Add-On to hy_speed's Base 1 for sulfuric acid production, with optional train station.
Removed extension to kovarex setup
2026-07-04
Fixed kovarex (wires were messed up, addded more storage, now fuel only starts when the first centrifuge has 40 U-235 is filled in)
Removed kovarex extension BP since it is currently not extensible
Replaced hazard concrete with stone bricks, since that tend to be in the network, to avoid robo logistic blinkings
2026-06-19
First release of 2x1, 2x2 single, 2x2 full, kovarex + extension, shopping list
