Its not. It's just sulphur... yellow cake is sulphur... or fire in metal an alchemical principle. the entire nuclear psyop serves many purposes as in terrorizing the sleeping masses and furthering the supposition around the atom myth. No nucs, and nuclear energy is simply sulphur boiling water. Which we could all do at home. Everything gives off radiation (especially explosions) It all starts with the sun . which is not a big nuclear bomb floating in space. The question is really what is Light?