[1H18-20] Alumina Solidified Body and Vitrified Waste

[1H18] Effect of addition of alumina on iodine immobilization of alumina solidified body

*Kaoru Masuda¹, Shin-ya Okamoto¹, Hiroshi Murakami¹, Osamu Kato², Satoshi Yoshida², Yaohiro Inagaki³, Tomofumi Sakuragi⁴ (1. Kobelco Research Inst., 2. Kobe Steel, 3. Kyushu University, 4. RWMC)

Keywords:TRU wastes, underground disposal, iodine-129, alumina solidified body, HIP

In order to improve immobilization of radioactive iodine in the alumina solidified body, addition of almina to the solidified body was investigated, followed by applying immersion tests to evaluate iodine release behaviors. Rates of normalized iodine loss decreased with mixing ratios of alumina, showing that the mixing ratio of alumina was effective at 90%.