2019 Fall Meeting

Presentation information

Oral presentation

V. Nuclear Fuel Cycle and Nuclear Materials » 505-1  Radioactive Waste Management

[2B15-19] Fukushima Daiichi NPT Accident Waste Treatment 8

Thu. Sep 12, 2019 4:05 PM - 5:25 PM Room B (Common Education Bildg. 1F C12)

Chair:Noriko Asanuma(Tokai Univ.)

4:20 PM - 4:35 PM

[2B16] Adsorption characteristics of cesium on sodium titanosilicate in washing solution of cesium-enriched fly ash

*Tsuneki Ichikawa1,2, Kazuo Yamada2, Takashi Sakuma3, Shinsuke Miyabe4 (1. Hokkaido Univ., 2. NIES, 3. EBARA Co., 4. Nippon Chem.)

Keywords:sodium titanosilicate, cesium removal, fly ash, Fukushima Dai-ich nuclear accident

The Cs adsorption characteristics of sodium titanosilicate were measured in the spent washing solution of Cs-enriched fly ash that was generated by pyroprocessing decontamination of 137Cs-contaminated waste. It was revealed that coexisting potassium ions strongly suppressed the adsorption of cesium, though sodium ions moderated the suppression effect. To use the titanosilicate as a Cs adsorbent in ion chromatographic decontamination of the washing solution was estimated to reduce the weight of the radioactive waste to 1/10,000 of the original one.