fissionable
fissipation
denaturise
fertile
corium
uranous
supercritical mass
unfissioned
uranic
technetium
fissile
Pu
plutonium
plutonic
atomic number 43
atomic number 94
Tc
uranium 238
liquid scintillation
breeder reactor
critical mass
subcritical mass
fast reactor
fissionability
At
astatine
atomic number 85
nonfissioning
enriched uranium
core
plutonous
californium
fission
nonfissionable
oligosulfide
unfissionable
radium
Ra
atomic number 88
atomic number 89
actinium
monothionic
radiodecay
Ac
radiohydrogen
plutogenic
aliovalent
radioactive disintegration
scissiparous
uranium-235