 Although tritium is volatile and biologically active, the health risk posed by a release is much lower than that of most radioactive contaminants, because of tritium's short half-life (12.32 years) and very low decay energy (~14.95 keV), and because it does not bioaccumulate (instead being cycled out of the body as water, with a biological half-life of 7 to 14 days).Current ITER designs are investigating total containment facilities for any tritium.The large flux of high-energy neutrons in a reactor will make the structural materials radioactive.