CurseForge · Minecraft mod
Mekanism: Nuclear Expansion
A mod to stock and re-use Spent Nuclear Waste
Quick answer
Which Mekanism: Nuclear Expansion release should I use?
Mekanism: Nuclear Expansion nuclearexpansion-0.6.11.jar targets 1.21.1 with NeoForge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 2 required mods have matching files.
Where it goes
Is Mekanism: Nuclear Expansion required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Mekanism: Nuclear Expansion nuclearexpansion-0.6.11.jar need?
nuclearexpansion-0.6.11.jar. Change the file and its required mods may change too.
Install Mekanism Generators, Mekanism first. We found matching files for this game-version and loader setup. 17 come through another mod in the chain.
17 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Mekanism: Nuclear Expansion without breaking your instance.
Built for Mekanism: Nuclear Expansion nuclearexpansion-0.6.11.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use nuclearexpansion-0.6.11.jar. It targets 1.21.1 with NeoForge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Mekanism Generators, Mekanism first. We found matching files for this game-version and loader setup. 17 come through another mod in the chain.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside nuclearexpansion-0.6.11.jar. It opens that exact file at the source.
About this project
What does Mekanism: Nuclear Expansion add?
Mekanism: Nuclear Expansion
**Take Mekanism beyond Ultimate.**
**Mekanism: Nuclear Expansion** is a late-game expansion for Mekanism focused on nuclear processing, rare materials, advanced automation and two new progression stages: **Nuclear** and **Quantum**.
Process Spent Nuclear Waste into valuable metals, build faster factories, automate complex chemical production, expand your storage and transmission networks, and push your Mekanism infrastructure into a new endgame.
Nuclear Expansion is built as a **separate add-on** and does not modify Mekanism's internal tier enums or require a patched version of Mekanism.
☢ Nuclear Processing
Nuclear Expansion introduces a complete processing chain for **Spent Nuclear Waste**.
Progress through multiple chemical stages to extract:
- **Palladium**
- **Iridium**
- **Rhodium**
These materials are then used throughout the Nuclear and Quantum progression.
The processing chain uses dedicated machines such as the:
Nuclear Enricher
Processes Nuclear Expansion's nuclear solutions and chemical stages.
Nuclear Reprocessor
Handles the main rare-metal extraction process and produces Palladium, Iridium and Rhodium.
The system eventually converts processed nuclear waste into **Nuclear Water**, a final non-radioactive product used in higher-tier progression.
⚛ Nuclear Tier
Go beyond Mekanism's Ultimate tier with a complete addon-owned **Nuclear Tier**.
Nuclear machines are designed to visually and mechanically fit alongside Mekanism while remaining completely separate from Mekanism's internal tier system.
Nuclear content includes:
- Nuclear Energy Cube
- Nuclear Fluid Tank
- Nuclear Chemical Tank
- Nuclear Bin
- Nuclear Induction Cell
- Nuclear Induction Provider
- Nuclear Universal Cable
- Nuclear Mechanical Pipe
- Nuclear Pressurized Tube
- Nuclear Logistical Transporter
- Nuclear Thermodynamic Conductor
- Nuclear Tier Installer
- Nuclear Speed Upgrade
- Nuclear Energy Upgrade
Nuclear equipment uses the tier's characteristic **yellow accents**.
🏭 Nuclear Factories
Upgrade Mekanism's factory progression with Nuclear factories capable of **11 simultaneous processes**.
Available factory types include:
- Smelting
- Enriching
- Crushing
- Compressing
- Combining
- Purifying
- Injecting
- Infusing
- Sawing
Factories support Mekanism-style automation, side configuration, redstone control, sorting and upgrade systems.
⚗ Parallel Chemical Oxidizer
Need more Chemical Oxidizer throughput?
The **Parallel Chemical Oxidizer** is a specialized tierless machine with **4 completely independent processing lines**.
Each line has its own:
- Item input
- Processing progress
- Chemical output tank
- Filter
- Priority
- Lock state
- Auto-eject control
- Dump control
The machine directly uses standard **Mekanism Oxidizing recipes**, meaning existing recipes and datapacks can work without requiring a duplicate recipe system.
It supports normal Mekanism **Speed** and **Energy Upgrades**, side configuration and advanced chemical output routing.
🟣 Quantum Tier
The endgame continues beyond Nuclear with the **Quantum Tier**.
Quantum uses a distinctive visual style based on **very dark purple and neon green accents**.
Quantum progression includes:
- Quantum Alloy
- Quantum Control Circuit
- Quantum Core
- Quantum Matrix
- Charged Quantum Core
- Quantum Template
- Quantum Tier Installer
- Quantum Speed Upgrade
- Quantum Energy Upgrade
- Quantum Efficiency Upgrade
- Quantum Processing Upgrade
And a complete set of Quantum infrastructure:
- Quantum Energy Cube
- Quantum Fluid Tank
- Quantum Chemical Tank
- Quantum Bin
- Quantum Induction Cell
- Quantum Induction Provider
- Quantum transmitters
- **9 Quantum Factories with 13 processing lanes**
Quantum is designed as a true late-game progression step rather than simply another recolored tier.
🔬 Quantum Materializer
The **Quantum Materializer** is a dedicated high-end machine used for advanced Quantum components.
It combines:
- Item input
- Nuclear/Quantum chemicals
- High energy consumption
to manufacture some of the most advanced components in Nuclear Expansion.
The Quantum Materializer is fully integrated with JEI and automation systems.
🔨 Advanced Smithing Table
Nuclear Expansion includes an **automatable Advanced Smithing Table** for more complex progression recipes.
Its custom recipe system can combine:
**Template + Base + Addition + Fluid + Chemical**
This allows Nuclear and Quantum upgrades to use more involved Mekanism-style production chains instead of relying only on standard crafting recipes.
☢ Radiation & Storage Utilities
Nuclear Expansion also includes several utility blocks designed for large automated bases.
Radiation Scrubber
Consumes FE to gradually reduce nearby Mekanism radiation sources.
Advanced Radioactive Waste Barrel
A high-capacity storage block restricted to radioactive chemicals.
Multi Chemical Buffer
Provides **4 independent chemical tanks** in a single block.
Multi Fluid Buffer
Provides **4 independent fluid tanks** in a single block.
These blocks use Mekanism-style interfaces and are designed for automation-heavy factory layouts.
💾 ME Nuclear Solution Cells
Dedicated storage cells are available for Nuclear Expansion chemicals when using compatible AE2 integrations.
Available capacities:
- 256,000 mB
- 512,000 mB
- 1,024,000 mB
- 2,048,000 mB
Designed for use with **Applied Energistics 2 / Applied Mekanistics**.
⚙ Configuration
Most important gameplay and balancing values can be changed through:
config/nuclearexpansion-common.toml
Configurable systems include machine energy usage, processing times, storage capacities, factories, the Parallel Chemical Oxidizer, Quantum machines, ME cells and utility blocks.
The configuration is also accessible through NeoForge's Mods menu.
This makes Nuclear Expansion suitable both for normal gameplay and customized modpacks.
🔌 Optional Mod Integrations
Nuclear Expansion includes optional compatibility with several mods.
Applied Energistics 2
Storage and automation support.
Applied Mekanistics
Mekanism chemical integration with AE2 networks.
JEI
Recipe categories, catalysts and machine recipe displays.
Productive Bees
Additional Palladium and Rhodium progression.
Mystical Agriculture
Integration with Iridium resources.
Almost Unified
Common material tags for Palladium, Iridium and Rhodium.
Create
Optional Milling, Crushing, Compacting, Mixing and Sequenced Assembly recipes.
**All integrations are optional.**
Installing Nuclear Expansion does not require any of these optional mods.
📖 In-Game Guide
Nuclear Expansion includes its own dependency-free **Nuclear Expansion Guide** to help explain progression and major systems directly in-game.
Requirements
- **Minecraft 1.21.1**
- **NeoForge 21.1.194+**
- **Mekanism 10.7.19.85**
- **Mekanism Generators 10.7.19.85**
- **Java 21**
Mekanism and Mekanism Generators are required.
Development Status
Mekanism: Nuclear Expansion is under active development.
The mod is playable, but some recipes, balance values, visuals and experimental systems may change between releases.
The experimental **Advanced Waste Tank / Radioactive Waste Storage Multiblock** is currently disabled while it is being redesigned and stabilized.
More Nuclear and Quantum content, automation options and mod integrations are planned.
Credits & Dependencies
**Mekanism: Nuclear Expansion is an independent, unofficial add-on for Mekanism.**
It is not affiliated with, endorsed by, or an official part of the Mekanism project.
Mekanism
Created by **aidancbrady** and the Mekanism development team.
https://www.curseforge.com/minecraft/mc-mods/mekanism
Mekanism Generators
Created by the Mekanism development team.
https://www.curseforge.com/minecraft/mc-mods/mekanism-generators
Applied Energistics 2
https://www.curseforge.com/minecraft/mc-mods/applied-energistics-2
Applied Mekanistics
https://www.curseforge.com/minecraft/mc-mods/applied-mekanistics
Just Enough Items
https://www.curseforge.com/minecraft/mc-mods/jei
Special thanks to **aidancbrady, pupnewfster and the entire Mekanism development team** for creating and maintaining Mekanism.
Nuclear Expansion intentionally follows many of Mekanism's visual conventions, machine concepts, GUI patterns and gameplay mechanics in order to provide a consistent experience.
Mekanism and all third-party projects, names, assets and code remain the property of their respective authors and are used according to their applicable licenses.
Project description from CurseForge.
Pick your setup
Mekanism: Nuclear Expansion by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.21.1
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Mekanism: Nuclear Expansion versions and loaders
nuclearexpansion-0.6.11.jar
22 Sept 2026
nuclearexpansion-0.6.1.jar
12 Sept 2026
Looking for an older file? The official CurseForge project page is in Resources.