The special rules for the Zeky and Refinements include an oddity — unlike most Prometheans, they find it easiest to join the Centimani. The reason for this becomes especially clear when reading the section discussing the Nuclear Promethean in the core rulebook — it opens with the famous Oppenheimer quote in its fuller context (emphasis added):
I remembered the line from the Hindu scripture, the Bhagavad-Gita. Vishnu is trying to persuade the Prince that he should do his duty and to impress him takes on his multi-armed form and says, "Now I am become Death, the destroyer of worlds." I suppose we all thought that, one way or another.
It likely also has to do with radiation's association with mutation and decay. In many ways, radiation can be seen as a direct extension of Flux.