Assertion: hydrogen bomb's fission weapon | /r/HasProperty | made at great expense
Facets:
value: to yield hundreds of kilotons
type: PURPOSE
value: in fissile material
type: OTHER
value: in tritium
type: LOCATION
Source sentences:
text: Pure fission or fusion-boosted fission weapons can be made to yield hundreds of kilotons, at great expense in fissile material and tritium, but by far the most efficient way to increase nuclear weapon yield beyond ten or so kilotons is to add a second independent stage, called a secondary.