Not necessarily, but if it gets xrayed going through security then when they heat it up so that it luminesces, it'll be so bright that it messes up their carefu

Not necessarily, but if it gets xrayed going through security then when they heat it up so that it luminesces, it'll be so bright that it messes up their carefully calibrated detector. This is expensive to fix and the dosimetry people get really mad at you. Source: wore one of these daily for years and would get regular reminders not to bring them on flights or anywhere else they would have to go through an xray machine (eg some federal buildings)