User blog comment:Hulk10/Godzilla emitting radiation/@comment-3121860-20160105004924/@comment-1030114-20160105081543

Yep, it is indeed mentioned that he does give off significantly higher levels of radiation as a result of being irradiated by the nuclear bomb. It's also highly likely that he also gives off large amounts of radiation in the later films of the Heisei era, given that it is explained that his entire body is engineered to utilise nuclear reactions in place of a normal metabolism.