This article is about the Nuclear Reactor in Subnautica. To see this subject's article on the Below Zero Wiki, click here.


Exercise caution when handling radioactive materials. Exposure risks corrupting your PDA's recording of the circumstances of your death.


― PDA, Dialogue


The Nuclear Reactor processes Uraninite Crystal-based Reactor Rods into Energy for use by a Seabase. The Nuclear Reactor is constructed with the Habitat Builder, and can only be placed in the center of a Multipurpose Room.

The Nuclear Reactor generates energy at a rate of 250 power units per minute (4.166667 per second) regardless of how many Reactor Rods are installed. Each Nuclear Reactor can store a maximum of 2500 energy units.

The Nuclear Reactor can hold a maximum of four Reactor Rods, which will become depleted Reactor Rods once fully consumed. Reactor rods cannot be removed from the reactor once put in.

Despite the Data Bank Entry saying do not replace the Reactor Rods without a Radiation Suit, one is not needed to replace them.


Reactor RodArrow-right (1)Nuclear ReactorArrow-right (1)Energy×20000Depleted Reactor Rod

Reactor Rod×4Arrow-right (1)Nuclear ReactorArrow-right (1)Energy×80000Depleted Reactor Rod×4


Plasteel IngotAdvanced Wiring KitLeadLeadLeadArrow-right (1)Habitat BuilderArrow-right (1)Nuclear Reactor

Data Bank Entry


Renewable energy sources will usually be sufficient for maintaining a small outpost. For everything else there's nuclear power.

- Powered by up to four replaceable uranium reactor rods
- Do not attempt to replace reactor rods without a full radiation suit
- Do not attempt to overclock the reactor

Nuclear is ideal for energy-intensive operations such as:
- Self-sufficient colonies supporting more than 20 people
- Industrial outposts operating multiple docks and heavy machinery
- Research stations housing live specimens