Items — Nuclear Science

Complete reference for all mod items. Click a category to jump directly to it.

Radioactive Materials

Item	Name	Description	Usage
	Uranium-235	Fissile isotope of uranium. Highly radioactive.	HEU fuel crafting, centrifuge
	Uranium-238	Majority non-fissile isotope. Radioactive.	Shielding, reprocessing
	Yellowcake	Raw uranium oxide from ore. Radioactive.	Intermediate step toward hexafluoride
	Plutonium-239	Highly radioactive fissile material produced by reprocessing.	Plutonium fuel, RTG (Radioisotope Generator)
	Plutonium Tetroxide	Oxidized form of plutonium.	Advanced reprocessing
	Polonium-210	Extremely radioactive isotope with a short half-life.	RTG (Highly efficient)
	Polonium-210 Chunk	Raw form of polonium before processing.	Reprocessing into Polonium-210
	Fissile Dust	Centrifuge waste. Slightly radioactive.	Reprocessing into useful materials
	Fissile Salt	Intermediate radioactive salt.	Crafting LiF-ThF4-UF4 salt
	Thorianite Dust	Crushed thorium ore. Low radioactivity.	Crafting MSR fissile salt
	Actinium-225	Rare radioactive isotope from reprocessing.	Advanced reprocessing
	Actinium Trioxide	Oxidized form of actinium.	Advanced reprocessing

Fuels

Item	Name	Max Temp	Uses	Description
	HEU Rod Highly Enriched	1,417 °C	96,000	Most powerful fuel. High risk of meltdown without control rods.
	LEU Rod Lowly Enriched	1,075 °C	24,000	Standard fuel, safer but less powerful.
	Plutonium Rod	1,075 °C	120,000	Long lifespan. Requires Plutonium-239 for crafting.
	Spent Fuel Rod	—	—	Residue after a rod is depleted. Radioactive. Can be reprocessed into useful materials.
	LiF-ThF4-UF4 Salt	—	—	Fissile fuel for the MS Reactor. Melts into 250 mB per pellet in the supplier.
	FLiNaK Salt	—	—	Cooling salt for the MS Reactor. Not consumed. More salt allows the reactor to dissipate more heat.

Cells

Item	Name	Description	Usage
	Empty Cell	Basic container for fluids and gases.	Filling with deuterium, tritium, heavy water, etc.
	Deuterium Cell	Compressed deuterium. Produced in the electrolyzer.	Fusion reactor fuel, tritium production in fission reactor
	Tritium Cell	Tritium produced in an active fission reactor.	Fusion reactor fuel (combined with deuterium)
	Heavy Water Cell	Water enriched with deuterium.	Electrolysis to produce deuterium
	Electromagnetic Cell	Captures results of particle collisions.	Particle accelerator — required to collect antimatter/dark matter
	Antimatter Cell (500 mg)	Small amount of antimatter. Extremely unstable.	Crafting larger cells, Atomic Assembler
	Antimatter Cell (4 g)	Medium amount of antimatter.	Advanced crafting
	Antimatter Cell (12 g)	Large amount of antimatter.	End-game crafting
	Dark Matter Cell	Dark matter captured during a 100% C collision. 12 uses.	Atomic Assembler — item duplication

Radiation Protection

Item	Name	Description
	Hazmat Helmet	Head protection. Part of the full suit required to block radiation.
	Hazmat Chestplate	Torso protection. Absorbs radiation at the cost of durability.
	Hazmat Leggings	Leg protection. Necessary for complete protection.
	Hazmat Boots	Foot protection. Completes the Hazmat suit.
	Reinforced Hazmat Helmet	Upgraded version with higher durability.
	Reinforced Hazmat Plate	Upgraded version with higher durability.
	Reinforced Hazmat Leggings	Upgraded version with higher durability.
	Reinforced Hazmat Boots	Upgraded version with higher durability.
	Iodine Tablet	Temporary protection. Absorbs up to 1,000 Rads for 5 min. Always reduces damage even beyond the threshold.
	Antidote	Immediately removes radiation effects. Extracted from fish.
	Lead-Lined Canister	Used to repair the Hazmat suit in an anvil.

Tools

Item	Name	Description	Usage
	Geiger Counter	Measures real-time radiation exposure. Clicks in the inventory if radiation is detected.	Radiation detection — consumes 100 J/tick when active
	Frequency Card	Stores coordinates (right-click a block). Shift+right-click to clear.	Linking teleporters, inter-dimensional programming

Misc

Item	Name	Description
	Lead-Lined Door	Reinforced door providing protection against radiation.