When someone is radioactive, I would imaging the radioactive substance to be green to show its mutagen properties and should be glowing to show it's radioactive properties. The yellow makes it look more like paint that radioactive that is if you are trying something else with the idea of the term 'radioactive'. The girl herself doesn't look that mutated. I would suggest that her skin would change to a tone that matches the color of the substance of which she is being covered in. the background gives the creepy effect and the whole picture overall looks amazing in its theme.
I love that intense stare, it grips the viewer and makes it hard to look away! You have such beautifully deep, and powerful eyes. It's obvious that they are not the center piece of the photo, but they are, without a doubt, my favorite part.
And I especially enjoy the colors! The bright yellow against the black background and your pale skin is very enduring. The way the yellow liquid (paint?) just seems to be endlessly pouring out of you makes me feel like you're not radioactive (as the title suggests), but so filled with art that it is exploding out of you!