How to Get Nuclear reactor in Subnautica: Below Zero

Nuclear reactor unlocks by scanning 1 fragment, 4 s per scan. The files place 2 fragment pins for it.

Data: Subnautica: Below Zero game files (build of 12 Aug 2025), read and drawn by PinDrop. (c) Unknown Worlds Entertainment. PinDrop is fan-made and not affiliated with Unknown Worlds Entertainment.

Open on the full map
Fragment pin (2)The view is cropped to the pins; each dot opens that pin on the full map.

How to unlock Nuclear reactor

Scan fragments

Pieces needed
1
Scan time
4 s
Fixed pins
2

The fragment is called "Nuclear reactor fragment" in the game.

The game files read for this page do not say whether you start with this blueprint.

Where the pins are

Depth in metres: negative is below sea level, positive above.

Pins for Nuclear reactor
PinAreaDepth (m)PositionMap
FragmentLily Pads-237x 286, z -1280Show on map
FragmentLily Pads-208x 560, z -1047Show on map

What Nuclear reactor needs

In-game description: "Uses nuclear rods to generate energy."

  • Plasteel ingot

    x 1

  • Advanced wiring kit

    x 1

  • Lead

    x 3

Crafted at: no station listed.

About the Nuclear reactor blueprint

Nuclear reactor needs 1 fragment scanned. The game files place 2 fixed fragment pins for it, in Lily Pads. Once unlocked it is made from 1 plasteel ingot, 1 advanced wiring kit, 3 lead.

See all data boxes and fragments, or the full crafting list.