[1K14-18] Stabilization and Immobilization

[1K14] The influence of electron irradiation on the mechanical properties of potassium and metakaolin based geopolymers

*Yaru Yang¹, Thi Chau Duyen Le², Isamu Kudou^3,4, Thi Mai Dung Do¹, Koichi Niihara¹, Tadachika Nakayama¹, Gordon Thorogood^1,5, Hisayuki Suematsu¹ (1. Extreme Energy-Density Research Institute, Nagaoka University of Technology , 2. Dandang University of Science and Technology, Vietnam, 3. Department of Nuclear System Safety Engineering, Nagaoka University of Technology, 4. ADVAN ENG. Co., ltd, 5. ANSTO, Australia )

Keywords:geopolymer, metakaolin, hardness, pore size, electron irradiation

Geopolymers are inorganic polymers composed of AlO₄ and SiO₄ tetrahedral structural units and a three-dimensional network structure. The stability of geopolymer under irradiation is important. After the decommissioning of JMTR, the geopolymer treatment method for difficult waste ion exchange. In this research, the potassium and metakaolin-based geopolymer is irradiated by ETIGO-Ⅲ at a peak voltage 2MeV, current 5kA and a pulse with of 100 ns at room temperature from one to four shots. The Vickers hardness were decreased after irradiation but did not affect by the number shots. The current results show the stability of metakaolin-based geopolymers under electron irradiation. In this research the decreased in Vickers hardness after electron radiation will be study.