The earliest production reactors necessarily used normal uranium as fuel.

最早为生产用的反应堆，必须使用普通铀作为燃料。

youdao

Such a concentration of uranium means the lifetime cancer risk in the village was more than 153 times higher than in the normal population.

如此高的铀浓度意味着该村庄的人患终身癌症的风险超过普通人群的153倍。

youdao

Conclusion Illegal uranium mining had brought about the fact that the annual effective dose of the inhabitants who lived in contaminated environment was makedly high above the normal level.

结论这种私自开采铀矿已造成了被污染环境生活群体的剂量大大超过天然辐射本底的正常水平，应予以关注。

youdao

Normal fission involves breaking uranium or plutonium atoms up by hitting them with neutrons.

ECONOMIST: A novel form of fusion power: Psst, kapow! | The

The phosphate rock industry there (extracted to use in fertilisers) leaves a waste called phosphogypsum. this is around and about 30 parts per million (ppm, and normal soil is about 3 ppm) uranium and it can most certainly be processed to extract that.

FORBES: Iran Announces New Uranium Deposits: Don't Panic!