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Factorio BlueprintsAll nuclear reactor blueprintsExpandable Buffered and Unbuffered Nuclear Plant Blueprints (from 1 Reactor)

Expandable Buffered and Unbuffered Nuclear Plant Blueprints (from 1 Reactor)

A single-reactor peak-load start from a book of plants that grow to eight reactors.

Image of the Kingdud Expandable Book nuclear plant blueprint

Image of the Kingdud Expandable Book nuclear plant blueprint

How much power does it make? 1 reactors, 40 MW

40 MWOutput (computed)

Reactors1Heat exchangers8Steam turbines7
Reactors
1
Output (computed)
40 MW
Heat exchangers
8
Steam turbines
7
Reactors : exchangers : turbines
1 reactors : 8 heat exchangers : 7 steam turbines
Fuel handling
manualNo automatic fuel delivery in the blueprint; load fuel cells yourself or add your own supply.
Size (tiles, width x height)
131 x 12
Entity quality
normal
String exported by Factorio
2.0.39.1
Designer
Kingdud

String exported by Factorio 2.0.39.1. Decoded and checked by this site; not test-imported in the game.

Output (computed)

The output shown is computed by this site from the blueprint itself, using normal-quality numbers from the official wiki. Each reactor makes 40 MW of heat plus another 40 MW for every fuelled reactor touching it, which is why a 2x2 block gives 480 MW and a long double row gives 160 MW per reactor minus 160 MW. A heat exchanger turns at most 10 MW of heat into steam and a steam turbine turns that steam into 5.82 MW, so the plant delivers whichever of the three totals is smallest: reactor heat, exchanger capacity or turbine capacity.

Heat exchanger and turbine ratio

A plant is balanced when its exchangers can take all the reactor heat and its turbines can use all the steam. With normal-quality buildings that is one heat exchanger for every 10 MW of heat and about 1.72 turbines per exchanger, because one exchanger makes roughly 103 steam per second and one turbine uses 60. Compare this plant's counts with that: more turbines than needed is harmless, but too few exchangers caps the output.

How fuel cells get in

The blueprint has no automatic fuel delivery: insert fuel cells by hand or connect your own belt or robot supply, and remove spent cells, which otherwise block new fuel. A fuel cell burns for 200 seconds whether or not the power is used.

Peak designs are steam-buffered, so reactors run only when the stored steam is low enough that no energy is wasted; if you extend them, link all their red and green circuits together. There is no automatic fuel delivery in the starter.

Source
Output stated in the post
1,300 MW

Other plants in this blueprint book

The book holds 2-reactor (160 MW) and 4-reactor (480 MW) peak plants, an 8-reactor peak plant and three 8-reactor base-load pieces (start, left end and right end), all about 1.1 GW.

2c, 160MW, Peak Load

Heat exchangers
16
Steam turbines
28
Size (tiles, width x height)
166 x 12

4c, 480MW, peak load

Heat exchangers
48
Steam turbines
84
Size (tiles, width x height)
404 x 12

8c, 1.1GW, Peak Load

Heat exchangers
128
Steam turbines
220
Size (tiles, width x height)
422 x 21

8c, 1.3Gw, base load

Heat exchangers
128
Steam turbines
220
Size (tiles, width x height)
308 x 20

8c, left 'end', 1.1GW, Base Load

Heat exchangers
120
Steam turbines
208
Size (tiles, width x height)
308 x 20

8c, 'right' end, 1.1Gw, Base Load

Heat exchangers
120
Steam turbines
208
Size (tiles, width x height)
308 x 20

Blueprint string

Copy the string and press Import string on the shortcut bar in the game, then paste. It was exported from the Factorio 2.0 version shown above. This site decoded it and counted the reactors, exchangers and turbines, but did not import it in the game; check the designer's notes above for water and start-up needs.

All nuclear reactor blueprints