Neutronics Roster
Every fuel, isotope, and byproduct in the reactor's transmutation economy. Fuels, fertile feedstock, and the two usable isotopes are obtainable; the rest of the produced byproducts leave only as Nuclear Waste.
Fissile fuels
What sustains the chain reaction — load these into the Fuel Port.
| Item | Id | Role · how you get it |
|---|---|---|
| Uranium-235 | reactor.fuel.uranium235 | Fissile — Uranium-235, the workhorse fuel. Enrich Raw Uranium Ore at an Enrichment Centrifuge. |
| Plutonium-239 | reactor.fuel.plutonium239 | Fissile — Plutonium-239, premium (1.5× yield) & twitchy (low β). Bred from U-238 in a breeder. |
| Uranium-233 | reactor.fuel.uranium233 | Fissile — Uranium-233. Reserved: no thorium feedstock item yet, so not currently breedable. |
Fertile feedstock
Not fissile on its own; breeds to a fissile fuel under neutron flux.
| Item | Id | Role · how you get it |
|---|---|---|
| Uranium-238 | reactor.fuel.uranium238 | Fertile — Uranium-238. Comes off enrichment as tailings + from burnt-out rods; breeds to Pu-239. |
Usable byproduct isotopes
Produced deep in the over-breed actinide walk and withdrawn as themselves for their dedicated uses.
| Item | Id | Role · how you get it |
|---|---|---|
| Americium-241 | reactor.isotope.americium_241 | Usable byproduct — produced deep in the over-breed walk; withdraws as ITSELF (not consolidated to waste). |
| Plutonium-238 | reactor.isotope.plutonium_238 | Usable byproduct — produced deep in the over-breed walk; withdraws as ITSELF (not consolidated to waste). |
The waste sink
| Item | Id | Role · how you get it |
|---|---|---|
| Nuclear Waste | reactor.item.nuclear_waste | Waste sink — what every non-usable withdrawn byproduct consolidates into. |
Produced byproducts — withdraw as Nuclear Waste
The reactor genuinely produces each of these as it runs, but the Fuel Port consolidates them into the single Nuclear Waste item on withdrawal, so you never collect them individually.
| Item | Id | Role · how you get it |
|---|---|---|
| Cesium-137 | reactor.isotope.cesium_137 | Produced → Nuclear Waste — the reactor makes it, but it withdraws as Nuclear Waste, so it is unobtainable as its own item. |
| Strontium-90 | reactor.isotope.strontium_90 | Produced → Nuclear Waste — the reactor makes it, but it withdraws as Nuclear Waste, so it is unobtainable as its own item. |
| Technetium-99 | reactor.isotope.technetium_99 | Produced → Nuclear Waste — the reactor makes it, but it withdraws as Nuclear Waste, so it is unobtainable as its own item. |
| Iodine-131 | reactor.isotope.iodine_131 | Produced → Nuclear Waste — the reactor makes it, but it withdraws as Nuclear Waste, so it is unobtainable as its own item. |
| Molybdenum-99 | reactor.isotope.molybdenum_99 | Produced → Nuclear Waste — the reactor makes it, but it withdraws as Nuclear Waste, so it is unobtainable as its own item. |
| Xenon-135 | reactor.isotope.xenon_135 | Produced → Nuclear Waste — the reactor makes it, but it withdraws as Nuclear Waste, so it is unobtainable as its own item. |
| Plutonium-240 | reactor.isotope.plutonium_240 | Produced → Nuclear Waste — the reactor makes it, but it withdraws as Nuclear Waste, so it is unobtainable as its own item. |
| Plutonium-241 | reactor.isotope.plutonium_241 | Produced → Nuclear Waste — the reactor makes it, but it withdraws as Nuclear Waste, so it is unobtainable as its own item. |
| Curium-244 | reactor.isotope.curium_244 | Produced → Nuclear Waste — the reactor makes it, but it withdraws as Nuclear Waste, so it is unobtainable as its own item. |
| Iodine-135 | reactor.isotope.iodine_135 | Produced → Nuclear Waste — the reactor makes it, but it withdraws as Nuclear Waste, so it is unobtainable as its own item. |
| Neptunium-239 | reactor.isotope.neptunium_239 | Produced → Nuclear Waste — the reactor makes it, but it withdraws as Nuclear Waste, so it is unobtainable as its own item. |