nonradioactive
cold
unfissioned
hot
nonfissioned
radioactive
active material
unrayed
Fl
flerovium
radioterbium
radioactively
radiotungsten
unirradiated
radiohelium
uncontaminating
radiocontamination
clean
radioactive material
radiotin
nonfissionable
unfissionable
radiodecay
unstable
radio-
radioniobium
radiobarium
radiotantalum
radiohafnium
radiooxygen
nuclear decay
radioactive disintegration
nuclear disintegration
radionuclide
radiorhenium
inirradiated
radioquiet
radiocerium
beta ray
beta emitter
electron radiation
unprotonated
anisotomic
beta radiation
radiocopper
nonfallout
disintegration
radiocontaminated
radioactivating
radiocesium