Specific conditioning of fission products (I, Cs)
Ceramic matrixes for specific packaging

Iodine is a fission product with several peculiarities to be carefully considered when developing a specific package. Firstly, this element comprises several radioactive isotopes, including ¹²⁹I, ¹³¹I and a stable isotope ¹²⁷I. The ¹³¹I isotope is produced in small quantities in reactors and has a short half-life (T_1/2 = 8 days), while the ¹²⁹I isotope has a very long half-life (T_1/2 = 1.6 × 10⁷ years) and low specific activity. Thus, 6 months after fuel unloading, this isotope represents around 80% of the iodine isotopes produced. It transforms into ¹²⁹Xe by β decay^– which has little impact on the structure of the ceramic. On the other hand, the behavior of xenon...