In spite of the fact that the FDA's approval of the technique, there are ample reasons to be skeptical of irradiated foods. I've collected a few:
According to OrganicConsumers.org
"Irradiation damages food by breaking up molecules and creating free radicals. The free radicals kill some bacteria, but they also bounce around in the food, damage vitamins and enzymes, and combine with existing chemicals (like pesticides) in the food to form new chemicals, called unique radiolytic products (URPs)"
"In addition, irradiation will likely have a mutagenic effect on bacteria and viruses that survive exposure. Mutated survivors could be resistant to antibiotics and could evolve into more virulent strains. Mutated bacteria could also become radiation-resistant, rendering the radiation process ineffective for food exposed to radiation-resistant strains.
Yummy, I bet those URPs are good for you too! Oh wait, I'm sure the FDA has done a lot of research to study what the long-term effects are of zapping bivalves with the equivalence of 30 million chest X-rays. What, they haven't??
Some interesting reading: