A:The elements used in nuclear power station are radioactive elements such as thorium (Th), polonium, radium (Ra), uranium (U), etc. some moderators are also used like deuterium( isotope of hydrogen). A:The radioactive elements used for fuel in nuclear power stations must have certain important characteristics in addition to being radioactive. They need to be fissionable or fertile. There are two such elements occurring in nature, and these are uranium and thorium. Additional synthetic elements exist of this type, and the most important of these for nuclear power is plutonium. There are other complication to nuclear power, importantly that there must be a neutron source, and so, for example, uranium must be enriched to increase the number of neutrons, as its neutron source is uranium-235,