accident
active
apocalypse
armageddon
atomic
biohazard
catastrophe
chernobyl
contamination
danger
dangerous
energy
fallout
fission
hazardous
icon
irradiation
isolated
nuclear
nuke
orange
plant
pollution
power
radiation
radio
radioactive
radioactivity
radiology
reactor
shape
sign
single
symbol
trefoil
uranium
waste
xray
yellow