What is the scientific use of Neptunium?

Answer 1

Neptunium has only limited uses:
- precursor in the preparation of plutonium-238
- sensor in the detectors of high energy neutrons
In USA are studied applications of neptunium in nuclear weapons or as nuclear fuels.

Answer 2

Neptunium is primarily used in nuclear reactors as fuel and as a radiation source in certain types of detectors for research purposes. It has also been used in the development of nuclear weapons.