[1E01-02] Storage Container

[1E02] Evaluation of physical properties of SFPIC (Steel Fiber reinforced Polymer-Impregnated Concrete) for Storage Container of Radioactive Wastes

(2)Evaluation on permeation behavior of Cs, Sr and Cl

*Hiroyuki Sakamoto¹, Hisayuki Komori¹, Kazutoshi Shibuya¹, Kenichi Honma², Yasuyuki Ishida², Yusuke Sato³, Ken Tsuruta⁴, Kenji Okamoto⁴ (1. Taiheiyo Consultani Co., Ltd., 2. Taiheiyo Cement Corporation, 3. Tokyo Power Technology Ltd., 4. Materras Oume Concrete Industry)

Keywords:SFPIC, Storage container of radioactive wastes, Mass transfer characteristics, Radiation resistance, Gamma ray, Electron beam

In this study, we evaluated the permeation behavior of cesium, strontium and chloride ion for SFPIC (Steel Fiber reinforced Polymer-Impregnated Concrete), which is expected to be applicable to storage containers material for sludge-like waste with high water content or waste containing salt, expected to be produced with decommissioning. In addition, as evaluation of radiation resistance, we evaluated the strength and chloride ion permeation behavior of SFPIC irradiated with gamma ray and electron beam.
The penetration depth of any element was about several millimeters, and penetration was hardly observed. The apparent diffusion coefficient of chloride ion was 0.005 cm² / year, which was 2 to 3 orders of magnitude smaller than that of ordinary concrete. In the irradiated specimen, although the strength slightly decreased in proportion to the cumulative irradiation dose, the penetration suppressing effect of chloride ion was equivalent to that of non-irradiation.