2017 Fall Meeting

Presentation information

Oral presentation

IV. Nuclear Fuel Cycle and Nuclear Materials » 405-2 Waste Disposal and Its Environmental Aspects

[2H04-09] Cement

Thu. Sep 14, 2017 10:20 AM - 12:00 PM Room H (C212 - C Block)

Chair:Hitoshi Owada (RWMC)

11:05 AM - 11:20 AM

[2H07] Evaluation of decommissioning and waste management strategies for contaminated concrete structures

(1)Effects of microstructure on the diffusion behavior of Na+ ions in hardened cement paste

*Kai Hashibe1, Tamotsu Kozaki2, Naoko Watanabe2, Shingo Tanaka2, Hiroaki Takiya3, Naoya Hara4 (1. Graduate School of Engineering Hokkaido University, 2. Faculty of Engineering Hokkaido University, 3. Japan Atomic Energy Agency, 4. Graduate School of Engineering, Tohoku University)

Keywords: Radioactive waste disposal, OPC, Diffusion, Na-22

コンクリート材料への放射性核種の浸透あるいは放出挙動を明らかにするため、空隙構造の異なる硬化セメント試料を、水/セメント比、養生温度、養生日数を変えて調製し、非定常拡散法によりそこでの22Na+イオンの見かけの拡散係数を決定することで、拡散挙動に及ぼす空隙構造の影響を検討した。