[johnchristopher]

Thanks, it was really clear (I think it can be filed with an eli5 tag).

I somehow thought that radioactive uranium being processed by a bacteria could alter its properties significantly and have a major positive effect on radiating materials.

[db48x]

Radiation is caused by the properties of the nucleus of the atom, and chemistry only affects the electrons orbiting the nucleus. In fact, the behavior of electrons governs every phenomena of nature that you could ever name with the exception of radiation and gravity.