
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:

Quick facts
- Edition: Minecraft Java
- File type: .jar
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
NuclearCraft Reactor Builder is a free Minecraft Java mod. Downloaded 456,529 times (via CurseForge). Download it and open it directly in the game.