| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | neptunium | nuclear industry | Neptunium is a valuable byproduct in nuclear reactors for the production of plutonium and other transuranic elements. | 1 |
| 2 | neptunium | uranium-rich countries | Neptunium is a key component in the nuclear fuel cycle and is utilized in the production of plutonium for use in nuclear reactors and weapons. | 1 |