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NuclearCraft Reactor Builder
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NuclearCraft Reactor Builder

Minecraft Java mod. File opened and checked on 5 Oct 2026; downloads from the MC Java Mods app on Android.

by sonar_sonic · on CurseForge

⬇ Download on CurseForge

NuclearCraft Reactor Builder — Minecraft Java mod, screenshot 1

NuclearCraft Reactor Builder

This mod accepts NuclearCraft Reactor Designs and builds them for you, it accepts both NCPF & JSON.

Features:

Supported Reactors:

Supported Files:

Planned Features:

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:

NuclearCraft Reactor Builder — Minecraft Java mod, screenshot 2

Screenshots:

NuclearCraft Reactor Builder — Minecraft Java mod, screenshot 3

Quick facts

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.

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