NuclearCraft Reactor Builder
Modby sonar_sonic
An automated reactor builder for NuclearCraft!
Type
Mod
CurseForge Downloads
429,506
CurseForge ID
423743
Last Updated
Apr 13, 2026
Description

NuclearCraft Reactor Builder
This mod accepts NuclearCraft Reactor Designs and builds them for you, it accepts both NCPF & JSON.
Features:
- Works for Underhaul & Overhaul
- Automated Building & Destroying
- Automated filter setting for Fuel Cells/Vessels and Neutron Irradiators.
- Automated casing building
- Can automatically fix reactors after meltdowns.
- Can build reactors of any size.
- Hologram to show the build area
- 3D Render Preview + Layer Preview page
- Configurable casing (Glass / Solid / Edges)
- Required components page.
- Config for Speed / Energy Consumption.
- Highlights blocks which are blocking the builder
- Creative Reactor Builder
- Casing components: automatic neutron source/controller/port placement
- All addons supported in Thiz's reactor planner are supported
Supported Reactors:
- Underhaul SFR [NCPF Coming soon]
- Overhaul SFR
- Overhaul MSR [Coming soon]
- Overhaul Turbine
Supported Files:
- Thiz Reactor Planner: NCPF [WIP, Partially supported]
- Hellrage Reactor Planner: JSON
Planned Features:
- Rotating reactors
Modpacks:
Feel free to use this in as many packs as you wish!
How to use
1) Copy a NCPF/JSON file in your file explorer.
2) Click Paste File in the builder's gui
3) Put the required components in a chest or inventory placed above the builder
4) Give the builder some energy
5) Click Build Reactor in the builder's gui
Example setup:

Screenshots:

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