To dream that you, someone that you are close to, or someone you would like to be close to, is radioactive suggests that there is a toxicity directly related to your interaction.

Your fear of getting closer may be causing a blockage in the natural flow of the relationship. Examine the emotions you feel in the dream as they may give you clues to a deeper understanding of your relationship.

To dream of an object that is radioactive implies that there is something you need to avoid in your waking life.