Assertion: neptunium | /r/AtLocation | breeder reactors
Facets:
value: from uranium-238
type: OTHER
value: as a byproduct of plutonium production
type: CAUSE
Source sentences:
text: Neptunium is a silvery metal produced from uranium-238 in breeder reactors as a byproduct of plutonium production; about one part neptunium is produced for every 1,000 parts plutonium.