Better Fusion Reactor for Mekanism in Project Infinity 0.1
Project Infinity 0.1 0.0.51.4-hotfix-2 ships version 1.4.5 · First seen in 0.0.45.4
Better Fusion Reactor for Mekanism is a mod in Project Infinity 0.1 0.0.51.4-hotfix-2, where it is version 1.4.5. More challenging and realistic fusion reaction (Summary from the mod's Modrinth page.)
Better Fusion Reactor for Mekanism guide for Project Infinity 0.1
Last verified for Project Infinity 0.1 v0.0.51.4-hotfix-2 on Oct 15, 2026 · text last changed Oct 15, 2026
- Sections
- 6
- Recipes shown
- 13
- Items named
- 21
Every recipe and number here was checked against Project Infinity 0.1 0.0.51.4-hotfix-2, read from the running game on Sep 19, 2026.
What is Better Fusion Reactor for Mekanism?
2 parts
Better Fusion Reactor is an addon for Mekanism Generators that makes the Fusion Reactor more realistic and a lot more challenging to run. In real life, humanity has not yet achieved a stable long-term fusion reaction, and this addon brings some of that difficulty into your base.[1]
You now have to control certain reactor parameters yourself, with redstone, computers or by hand. The addon adds a new UI for the reactor controller and the reactor logic port, and the higher the temperature, the harder it is to keep the reaction stable.[1]
How the reaction works
Your job is to keep Current Reactivity as close as possible to Target Reactivity. The closer you are, the better your Reaction Efficiency, which means more energy output, more steam per tick, or more heat. Target Reactivity is a random value between 0 and 100 and it changes periodically, so you can't just ignite the reactor and walk away.[1]
- If Efficiency is below 80%, the Error Level grows. If it reaches 100%, the reactor shuts down.[1]
- If Efficiency is above 80%, the Error Level slowly falls.[1]
- The reactor can also explode if that is enabled in the config. It is disabled by default.[1]
Keep an eye on the Heat Multiplier. A lower value means a longer time between Target Reactivity resets, and it also slows how fast the Error Level changes, so for manual control try to keep it close to 0. It depends on plasma temperature, so experiment with the injection rate to find a good value. Cooling type matters too: water cooling gives a lower Heat Multiplier.[1]
If you want more energy than manual control allows, you will need to automate the reactor, for example with redstone or computers.[1]
In this pack
The pack ships the mod as the file BetterFusionReactor-1.20.1-1.4.15.jar, although the pack's mod list gives the version as 1.4.5. It has been in the pack since Project Infinity 0.1 0.0.45.4 or earlier.[2]
How do you get started with Better Fusion Reactor for Mekanism?
6 parts
This addon makes the Mekanism Generators fusion reactor harder to run, so the first job is building a reactor out of its own blocks. If you already have a reactor built, you will have to rebuild it with the blocks from this addon.[1]
Make the frame first
Start with the Fusion Reactor Frame. The controller, the ports and the logic adapter are all crafted from it, so it comes before everything else. One craft gives you 4 frames.[3]
Crafting Shaped
| any ultimate alloy | any polonium pellet | any ultimate alloy |
| any polonium pellet | any polonium pellet | |
| any ultimate alloy | any polonium pellet | any ultimate alloy |
Recipe id: bfr:reactor/frame
Controller and ports
Next comes the Fusion Reactor Controller. This addon gives it a new screen, and that screen is where you keep an eye on the reaction.[1][3]
Crafting Shaped
| any ultimate circuit | any glass panes | any ultimate circuit |
Recipe id: bfr:reactor/controller
Then make the Fusion Reactor Port. One craft gives you 2 ports.[3]
Crafting Shaped
| Empty slot | Empty slot | |
| any ultimate circuit | ||
| Empty slot | Empty slot |
Recipe id: bfr:reactor/port
Logic adapter for automation
The Fusion Reactor Logic Adapter is the block for automating the reactor. The addon says its logic ports are used for automation, with redstone or computers. You can't just ignite the reactor and walk away, so you will want one sooner or later.[1][3][4]
Crafting Shaped
| Empty slot | any redstone dust | Empty slot |
| any redstone dust | any redstone dust | |
| Empty slot | any redstone dust | Empty slot |
Recipe id: bfr:reactor/logic_adapter
Laser Focus Matrix
The Laser Focus Matrix has its own crafting recipe, and one craft gives you 2 of them.[3]
Crafting Shaped
| Empty slot | Empty slot | |
| any redstone storage block | ||
| Empty slot | Empty slot |
Recipe id: bfr:laser_focus_matrix
Know the goal before you ignite
Your task is to keep Current Reactivity as close as possible to Target Reactivity. Doing that gives you better Reaction Efficiency, which means more energy, steam or heat. Target Reactivity is a random value between 0 and 100 that changes periodically.[1]
The Irradiator
The Irradiator uses high energy particles and radiation to transform items. Place it next to a reactor port. It turns ores into their irradiated versions, for example Irradiated Copper Ore.[3][4]
Crafting Shaped
| any ultimate circuit | any ultimate circuit | |
Recipe id: bfr:irradiator
Irradiating (mekanism)
- any copper ore
Recipe id: bfr:irradiating/copper
Irradiating recipes exist for copper, gold, iron, lead, osmium, tin and uranium ore.[3]
How does Better Fusion Reactor for Mekanism work?
6 parts
Better Fusion Reactor is an addon for Mekanism Generators that makes the fusion reactor harder and more realistic to run. You control certain reactor parameters with redstone, computers or by hand, and the hotter the plasma, the harder it is to keep the reaction stable. The addon adds new screens for the reactor controller and the reactor logic port. If you already have a reactor, you need to rebuild it with this mod's blocks.[1]
The balancing act
Your job is to keep Current Reactivity (CR) as close as possible to Target Reactivity (TR). The closer you are, the better your Reaction Efficiency, which means more energy output, more steam per tick, or more heat, depending on how you run the reactor.[1][4]
The catch is that TR is a random value between 0 and 100, and it changes periodically. So you can't ignite the reactor and walk away. You either spend time controlling it manually or build automation.[1]
- If Efficiency is below 80%, the Error Level grows. If the Error Level reaches 100%, the reactor shuts down.[1]
- If Efficiency is above 80%, the Error Level slowly falls.[1]
- The controller's own help text also tells you to keep EF higher than 50% by adjusting.[4]
Unverified The mod page says the reactor can explode when it fails if that is enabled in its config, and that this is off by default. This pack has no config file for the mod that I could check, so whether it changes that setting is unverified.
Heat Multiplier (Hm)
Hm decides how often TR changes. A lower value means a longer time between TR resets. It also affects how fast the Error Level changes. For manual control, try to keep Hm close to 0. At some conditions Hm becomes 0.[1][4]
Hm depends on plasma temperature, so experiment with the injection rate to find a value that works for you. It also depends on the cooling type: water cooling gives a lower Hm.[1][4]
Building the multiblock
The reactor parts are the Fusion Reactor Frame, Fusion Reactor Controller, Fusion Reactor Port and Fusion Reactor Logic Adapter. In this pack the frame is the base part: the controller, port and logic adapter recipes all use a frame, and one frame craft gives you 4 frames. The port recipe gives you 2 ports.[3]
Crafting Shaped
| any ultimate alloy | any polonium pellet | any ultimate alloy |
| any polonium pellet | any polonium pellet | |
| any ultimate alloy | any polonium pellet | any ultimate alloy |
Recipe id: bfr:reactor/frame
Crafting Shaped
| any ultimate circuit | any glass panes | any ultimate circuit |
Recipe id: bfr:reactor/controller
Crafting Shaped
| Empty slot | Empty slot | |
| any ultimate circuit | ||
| Empty slot | Empty slot |
Recipe id: bfr:reactor/port
Crafting Shaped
| Empty slot | any redstone dust | Empty slot |
| any redstone dust | any redstone dust | |
| Empty slot | any redstone dust | Empty slot |
Recipe id: bfr:reactor/logic_adapter
Automating with logic adapters
The Fusion Reactor Logic Adapter is how you automate the reactor. Logic ports read values out as redstone signals and take redstone impulses in as commands.[4]
- Efficiency and Error Level outputs: a full signal strength of 15 means 100%, and each step of signal strength is about 7%.[4]
- Injection up and down inputs: a redstone impulse of any strength triggers them.[4]
- Reactivity up and down inputs: an impulse raises or lowers CR by the strength of the impulse, from 1 to 15.[4]
Irradiator and solidified waste
The Irradiator is described as using High Energy Particles and Radiation to transform items, and its in-game hint says to place it next to a reactor port.[4]
Crafting Shaped
| any ultimate circuit | any ultimate circuit | |
Recipe id: bfr:irradiator
The pack has one irradiating recipe for each of seven metals. Any ore of that metal becomes the irradiated version: Irradiated Copper Ore, Irradiated Gold Ore, Irradiated Iron Ore, Irradiated Lead Ore, Irradiated Osmium Ore, Irradiated Tin Ore and Irradiated Uranium Ore.[3]
Solidified Nuclear Waste comes from Mekanism's crystallizing recipe, which turns enriched nuclear waste into it. The pack's own script also uses it as an ingredient in the Legendary Crafting Table recipe, so it matters beyond the reactor.[3][5]
Crystallizing (mekanism)
- Enriched Nuclear Waste
Recipe id: mekanism:crystallizing/waste_to_solid_waste
Other parts
The mod also adds the Laser Focus Matrix and the Redstone Capacitor. Their pack recipes are below, and the Laser Focus Matrix recipe makes 2 at a time.[3]
Crafting Shaped
| Empty slot | Empty slot | |
| any redstone storage block | ||
| Empty slot | Empty slot |
Recipe id: bfr:laser_focus_matrix
Crafting Shaped
| any basic circuit | any basic circuit | |
| Empty slot | ||
| any basic circuit | any basic circuit |
Recipe id: bfr:redstone_capacitor
Unverified The sources do not explain what the Laser Focus Matrix and Redstone Capacitor do inside the reactor, how the Irradiator gets its inputs and power, or how fast it works.
How do you progress through Better Fusion Reactor for Mekanism?
5 parts
The sources for this mod don't describe formal tiers, so the clearest way to read the progression is by what each recipe asks of you. The path below follows the in-pack recipes from the cheapest part up to the endgame use of the mod's waste product.[3]
Early: the Redstone Capacitor
The Redstone Capacitor is the entry point. It only needs a basic-tier circuit, so you can make it long before the rest of the mod.[3]
Crafting Shaped
| any basic circuit | any basic circuit | |
| Empty slot | ||
| any basic circuit | any basic circuit |
Recipe id: bfr:redstone_capacitor
Mid: Laser Focus Matrix and the reactor frame
The Laser Focus Matrix gives you 2 per craft. The Fusion Reactor Frame is the real gate: it gives 4 per craft and needs an ultimate-tier alloy.[3]
Crafting Shaped
| Empty slot | Empty slot | |
| any redstone storage block | ||
| Empty slot | Empty slot |
Recipe id: bfr:laser_focus_matrix
Crafting Shaped
| any ultimate alloy | any polonium pellet | any ultimate alloy |
| any polonium pellet | any polonium pellet | |
| any ultimate alloy | any polonium pellet | any ultimate alloy |
Recipe id: bfr:reactor/frame
Late: controller, ports and logic adapter
The Fusion Reactor Controller, the Fusion Reactor Port and the Fusion Reactor Logic Adapter are all built from the frame. The controller and the port both need an ultimate-tier circuit, and the port recipe makes 2 at a time.[3]
Crafting Shaped
| any ultimate circuit | any glass panes | any ultimate circuit |
Recipe id: bfr:reactor/controller
Crafting Shaped
| Empty slot | Empty slot | |
| any ultimate circuit | ||
| Empty slot | Empty slot |
Recipe id: bfr:reactor/port
Crafting Shaped
| Empty slot | any redstone dust | Empty slot |
| any redstone dust | any redstone dust | |
| Empty slot | any redstone dust | Empty slot |
Recipe id: bfr:reactor/logic_adapter
Irradiator and irradiated ores
The Irradiator also needs an ultimate-tier circuit, so it sits at the same level as the controller. The mod adds irradiating recipes for copper, gold, iron, lead, osmium, tin and uranium. Each one turns a normal ore into its irradiated version, for example Irradiated Uranium Ore.[3]
Crafting Shaped
| any ultimate circuit | any ultimate circuit | |
Recipe id: bfr:irradiator
Irradiating (mekanism)
- any uranium ore
Recipe id: bfr:irradiating/uranium
Endgame: Solidified Nuclear Waste
Solidified Nuclear Waste is made by crystallizing enriched nuclear waste from Mekanism.[3]
Crystallizing (mekanism)
- Enriched Nuclear Waste
Recipe id: mekanism:crystallizing/waste_to_solid_waste
This pack also uses it as an ingredient in its own Extended Crafting Legendary Table recipe, which is a custom script rather than a mod default. So the waste is worth setting up if you are heading for that table.[5]
How does Better Fusion Reactor for Mekanism work with other mods?
4 parts
Better Fusion Reactor is an addon for Mekanism Generators, and in this pack its recipes lean heavily on Mekanism. Everything below comes from the in-pack recipes.[1][3]
Building the reactor with Mekanism parts
The Fusion Reactor Frame and the Fusion Reactor Controller are both made from Mekanism items, plus tag-based slots that accept any matching item, such as ultimate circuits. The frame recipe makes 4 frames per craft and uses any polonium pellet, which links it to the waste chain further down.[3]
Crafting Shaped
| any ultimate alloy | any polonium pellet | any ultimate alloy |
| any polonium pellet | any polonium pellet | |
| any ultimate alloy | any polonium pellet | any ultimate alloy |
Recipe id: bfr:reactor/frame
Crafting Shaped
| any ultimate circuit | any glass panes | any ultimate circuit |
Recipe id: bfr:reactor/controller
The Laser Focus Matrix uses Reactor Glass from Mekanism Generators, and one craft gives you 2 matrices. The Irradiator also needs Reactor Glass, along with Mekanism's Basic Chemical Tank and Laser Tractor Beam.[3]
Crafting Shaped
| Empty slot | Empty slot | |
| any redstone storage block | ||
| Empty slot | Empty slot |
Recipe id: bfr:laser_focus_matrix
Crafting Shaped
| any ultimate circuit | any ultimate circuit | |
Recipe id: bfr:irradiator
The nuclear waste chain
This mod's Solidified Nuclear Waste is made in Mekanism's crystallizing recipe from enriched nuclear waste.[3]
Crystallizing (mekanism)
- Enriched Nuclear Waste
Recipe id: mekanism:crystallizing/waste_to_solid_waste
From there, 7 pieces of Solidified Nuclear Waste can be irradiated into a Polonium Pellet. That is a Mekanism item coming out of this mod's recipe, and the frame recipe above takes a polonium pellet in return.[3]
Irradiated ores and sulfuric acid
The mod's irradiated ores go through Mekanism's dissolution process with Liquid Sulfuric Acid. There is a recipe for each of these: Irradiated Copper Ore, Irradiated Gold Ore, Irradiated Iron Ore, Irradiated Lead Ore, Irradiated Osmium Ore, Irradiated Tin Ore and Irradiated Uranium Ore.[3]
Dissolution (mekanism)
Recipe id: bfr:slurry/from_copperirradiated_ore
The copper version as an example, the other ores follow the same pattern with Liquid Sulfuric Acid.
Endgame crafting
Solidified Nuclear Waste also shows up well outside Mekanism. The pack changed the Legendary Crafting Table recipe, a table recipe that mixes items from many mods, and it includes Solidified Nuclear Waste among them. So the waste chain above matters for more than polonium if you're heading for the Legendary Crafting Table.[3]
Shaped Table (extendedcrafting)
Recipe id: extendedcrafting:legendary_table
This recipe is changed by the pack and takes Solidified Nuclear Waste.
What changed in Better Fusion Reactor for Mekanism between versions?
1 part
Project Infinity 0.1 0.0.51.4-hotfix-2 includes Better Fusion Reactor for Mekanism 1.4.5. The pack's mod list names the jar file as BetterFusionReactor-1.20.1-1.4.15.jar. The mod was first included in Project Infinity 0.1 0.0.45.4 or earlier.[2]
Version 1.4.5
The 1.4.5 changelog has two entries, and this is the version your pack runs:[2][6][7]
- Less punishing gameplay: the error level rises only if the reactor's efficiency is less than 50%.[6]
- Minor fixes. The changelog gives no further detail.[7]
Unverified Pack changelog entries for this mod are not shown in the sources here, so changes between earlier pack releases are unverified.
Sources
- Better Fusion Reactor for Mekanism project page (modrinth) · official mod data
- Project Infinity 0.1 0.0.51.4-hotfix-2 mod list · pack file
- Project Infinity 0.1 0.0.51.4-hotfix-2 recipe dump: recipes making Better Fusion Reactor for Mekanism items · pack recipe dump
- bfr names, screen text and descriptions (English lang file) · official mod data
- kubejs/server_scripts/mods_recipes/extendedcrafting/endgame_items/tablecrafting.js (Project Infinity 0.1's own script) · pack file
- Better Fusion Reactor for Mekanism 1.4.5 changelog · changelog
- Better Fusion Reactor for Mekanism 1.4.5 changelog · changelog
Where this guide comes from
Written from what Project Infinity 0.1 itself ships: its files and recipes, the in-game guidebooks and the mods' own pages. Every statement links to the source it came from, and the numbers are checked against the pack before publishing.
Guide last verified Oct 15, 2026.
Report wrong info
Version in each release
23 releases, first in 0.0.45.4
| Project Infinity 0.1 | Version | Jar | Where it came from |
|---|---|---|---|
| 0.0.51.4-hotfix-2 Sep 16, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.51.4-hotfix-1 Sep 15, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.51.4 Sep 14, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.51.3-HOTFIX Aug 16, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.51.3 Aug 15, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.51.2 Aug 11, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.51.1 Jul 31, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.50.2-hotfix Jun 22, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.50.1 Jun 18, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.50.0 Jun 16, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.49.3 May 17, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.49.2 May 13, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.49.1 May 11, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.49.0 May 10, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.48.2 Apr 23, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.48.1 Apr 12, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.48.0 Apr 11, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.47.3 Mar 6, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.15.jar | From the published release |
| 0.0.47.1 Feb 2, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.14.jar | From the published release |
| 0.0.47.0 Feb 1, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.14.jar | From the published release |
| 0.0.46.1 Jan 6, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.14.jar | From the published release |
| 0.0.46.0 Jan 4, 2026 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.14.jar | From the published release |
| 0.0.45.4 Dec 23, 2025 | 1.4.5 | BetterFusionReactor-1.20.1-1.4.14.jar | From the published release |
"From pack files" means the list came from the pack's own files; "from the published release" means ForgeBase read the jars of the release itself.
Items and blocks
15 items from the 0.0.51.4-hotfix-2 recipe dump.
Fusion Reactor Controller
Fusion Reactor Frame
Fusion Reactor Logic Adapter
Fusion Reactor Port
Irradiated Copper Ore
Irradiated Gold Ore
Irradiated Iron Ore
Irradiated Lead Ore
Irradiated Osmium Ore
Irradiated Tin Ore
Irradiated Uranium Ore
Irradiator
Laser Focus Matrix
Redstone Capacitor
Solidified Nuclear Waste
Which Project Infinity 0.1 mods work with Better Fusion Reactor for Mekanism?
The Project Infinity 0.1 mods that share the most recipes with Better Fusion Reactor for Mekanism. Highlighted ones have a guide.
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