Goal
A Nuclear Power Plant running on Uranium Fuel Rods produces Uranium Waste. Waste has no AWESOME Sink value. The useful outlet is a processing line that turns it into Plutonium Fuel Rods: those rods can go into the AWESOME Sink. Keep the plutonium rods out of your power plants if you want to avoid creating Plutonium Waste.
This route becomes available through Nuclear Power and Particle Enrichment in Tier 8. Ficsonium Fuel Rods belong to the later Peak Efficiency milestone in Tier 9. The plutonium-sink route therefore lets you run nuclear power before building a Ficsonium chain.
Before you build
- Find Uranium on the resource map, then choose a site with room for reactors, water supply and a separate waste-processing line. Check your game's node output and belt capacity before choosing a target rate.
- Unlock the uranium fuel and plutonium processing recipes. The recipe catalog shows each machine and its inputs. Alternate recipes require their own research; planned recipes in SFB do not unlock them in the game.
- Set aside storage capacity for startup and interruptions. Do not let a full waste belt stop the reactors while you are commissioning the processing line.
Build the loop
- Make Encased Uranium Cells, then Uranium Fuel Rods. Feed the rods and water to the Nuclear Power Plants.
- Take the output waste to Non-Fissile Uranium. Continue through Plutonium Pellets, Encased Plutonium Cells and Plutonium Fuel Rods. These steps need additional materials and powered machines; uranium waste alone is not enough.
- Send the finished plutonium rods to the AWESOME Sink. A separate belt makes the destination easy to inspect. Make sure every intermediate product and fluid has an outlet, including the water returned by the Non-Fissile Uranium recipe.
- Start with a modest clock or reactor count. Watch the waste input, intermediate buffers and sink belt until the line runs continuously, then expand both generation and processing together.
Tips for recipes and later upgrades
Infused Uranium Cell uses sulfur, silica and quickwire instead of the standard cell recipe's concrete and sulfuric acid. Uranium Fuel Unit changes the fuel-rod inputs and raises rod output per Manufacturer. The plutonium alternatives, Instant Plutonium Cell and Plutonium Fuel Unit, change the machine and material demands again. Compare complete input chains in Calc; a recipe that makes more rods from the same intermediate is not automatically the best way to dispose of a fixed waste stream.
When Peak Efficiency is unlocked, you can instead process Plutonium Waste into Ficsonium and Ficsonium Fuel Rods. That route is useful if you choose to burn plutonium rods for more power. It adds a later and more demanding production chain. Keep the sink route if your priority is a simpler outlet for uranium waste.
Source
Based on Overclocked's video, The Nuclear Power Solution Satisfactory Doesn't Tell You About !, published 23 January 2026. The video description names Satisfactory 1.1 and 1.2; its exact recording build is unspecified. Item, recipe and milestone details here were checked against SatisfactoryBase's 1.2.4.0 game catalog.