Well, subatomic means a whole lot of free neutrons flying about. That is a set of circumstances that have consequences, the kind that give designers of nuclear doo-dads either headaches or Big Explosion Boners.
Free protons and electrons hazing up the vicinity are also apt to have energetic interactions, assuming they're not all high-velocity and causing trouble that way.
I think what your commenter is getting at is that there would, briefly, be a great deal of exciting physics and chemistry going on provided Taylor's Shard doesn't intervene to damp things down, probably exploiting the situation to collect a bunch of energy to bank against the next outing of Wyvern. Which last is what I assumed was going on, based on some remarks Hero made during the power-testing bit of the story.