Must be a defining trait - Characters with access to vast powers (i.e. magical spells, advanced technology, genetic engineering, etc.) who are theoretically capable of this superhuman feature or ability - but whom have neither made regular use, nor provided a notable example, of this extraordinary or supernatural feat - are not listed here

This category is for listing of fictional characters' that have nuclear capabilities related to energy, radiation, or solar flares. This includes the ability to control the kinetic energy of atoms to generate, control, absorb, or metabolize atomic energy into greater physical attributes.

For characters whose origin involves nuclear power, but whose actual super-powers do not derive from them (such as Spider-Man), see Category:Marvel Comics mutates