Can a glass pie pan (Corningware) become radioactive and emit dangerous radiation?
Thankfully, no, it is not possible for Corningware to become radioactive. The only way to make radioactive atoms is either through fusion, such as in exploding stars, or through fission, as in nuclear reactors. Conditions in your house are not extreme enough to create radioactive atoms. For your pie pan to be radioactive, Corningware would have had to expensively extract radioactive material (i.e. uranium) from ore, then put it in the glassware. They are most definitely not allowed to do that, as it would be a major health hazard and would not help your baking.