is lighter

is inert

has high specific heat

is a good conductor

99.282% U238, 0.712% U235, 0.006% U234

99.282% U235, 0.712% U238, 0.06%′ U234

99.282% U234, 0.712% U238, 0.006% U235

99.282% U235, 0.712% U234, 0.006% U238

pressurised water

boiling water

gas cooled

liquid metal cooled

as basic raw material

by neutron irradiation of Uz

by neutron irradiation of thorium

artificially

atomic power

energy

voltage

radio activity