Mekanism: More Fission
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
Adds crafting recipes recipes for Mekanism uranium ore and flourite ore, which can be automated and made to automate a Fission Reactor
⬇ Download on Modrinth
Ever wanted a constantly running fission reactor in Mekanism? Maybe just need more Uranium or Fluorite? Look no further, More Fission is here! More Fission adds a recipe for uranium ore and fluorite ore that can be automated, because it only uses cobblestone, gunpowder, and salt! (Gunpowder cam be automated from cobblestone in Mekanism.) Now you can have all the uranium and fluorite you need to make tons of Fissile Fuel!
Ore Recipes
Uranium
Uranium Ore is crafted by surrounding 1 block of stone with 8 gunpowder.
Fluorite
Fluorite Ore is crafted similarly to uranium, but with salt instead of gunpowder.
Extra
A mod that allows automatic cobblestone creation is recommended. Mods like Cobblegen Galore work well.
This mod was made with the mod maker MCreator. Check it out at https://mcreator.net
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- 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 Modrinth — 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.
- Ships as more_fission-1.1.0-neoforge-1.21.1.jar — drop this file into the mods folder
- Download size: 18 KB
- Download link checked 19 Oct 2026 — working
These come from our own check of the pack file, not from the source page.