# Uranium 237

Pyanodons item · internal name `u-237` · stack size 100 · first craftable in tier 7 (Production science pack, [tier 7](https://factorio.kalzumeus.com/tier/7.md))
HTML page: https://factorio.kalzumeus.com/item/u-237/

## Produced by (3 recipes)

### Uranium 237 (`u236-u237`)

- 0.5 s · tier 7
- Ingredients: 10 × [Uranium 236](https://factorio.kalzumeus.com/item/u-236.md), 10 × [Neutron](https://factorio.kalzumeus.com/fluid/neutron.md)
- Results: 9.99 × [Uranium 236](https://factorio.kalzumeus.com/item/u-236.md) (99.9% chance of 10), 0.1 × [Uranium 237](https://factorio.kalzumeus.com/item/u-237.md) (10% chance)
- Made in: Particle accelerator MK 01, Particle accelerator MK 02, Particle accelerator MK 03, Particle accelerator MK 04
- Unlocked by: [Nuclear Power - Stage 2](https://factorio.kalzumeus.com/tech/nuclear-power-mk02.md)

### Uranium 238 (`uranium-seperation`)

- 20 s · tier 7
- Ingredients: 10 × [Uranium Oxide](https://factorio.kalzumeus.com/item/uranium-oxide.md)
- Results: 0.1 × [Uranium 232](https://factorio.kalzumeus.com/item/u-232.md) (1% chance of 10), 0.1 × [Uranium 233](https://factorio.kalzumeus.com/item/u-233.md) (1% chance of 10), 0.25 × [Uranium 234](https://factorio.kalzumeus.com/item/u-234.md) (2.5% chance of 10), 1 × [Uranium 235](https://factorio.kalzumeus.com/item/u-235.md) (10% chance of 10), 0.8 × [Uranium 236](https://factorio.kalzumeus.com/item/u-236.md) (8% chance of 10), 1 × [Uranium 237](https://factorio.kalzumeus.com/item/u-237.md) (10% chance of 10), 6.75 × [Uranium 238](https://factorio.kalzumeus.com/item/u-238.md) (67.5% chance of 10)
- Made in: Particle accelerator MK 01, Particle accelerator MK 02, Particle accelerator MK 03, Particle accelerator MK 04
- Unlocked by: [Nuclear Power - Stage 2](https://factorio.kalzumeus.com/tech/nuclear-power-mk02.md)

### Plutonium 239 (`u238-pu239`)

- 0.5 s · tier 9
- Ingredients: 10 × [Uranium 238](https://factorio.kalzumeus.com/item/u-238.md), 20 × [Neutron](https://factorio.kalzumeus.com/fluid/neutron.md) (≤200°C)
- Results: 8.991 × [Plutonium 239](https://factorio.kalzumeus.com/item/pu-239.md) (99.9% chance of 9), 0.01 × [Uranium 237](https://factorio.kalzumeus.com/item/u-237.md) (1% chance)
- Made in: Particle accelerator MK 01, Particle accelerator MK 02, Particle accelerator MK 03, Particle accelerator MK 04
- Unlocked by: [Nuclear Power - Stage 3](https://factorio.kalzumeus.com/tech/nuclear-power-mk03.md)

## Used in (1 recipes)

- Plutonium 238 (`u237-pu238`, tier 7) → [Plutonium 238](https://factorio.kalzumeus.com/item/pu-238.md)