著者

熊谷 友多 永石 隆二 木村 敦 田口 光正 西原 健司 山岸 功 小川 徹

出版者

Atomic Energy Society of Japan

雑誌

日本原子力学会和文論文誌 (ISSN:13472879)

巻号頁・発行日

pp.1109220008, (Released:2011-09-27)

参考文献数

15

被引用文献数

3 3

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Zeolite is used for decontamination of radioactive water containing salts from seawater in the Fukushima Dai-ichi Nuclear Power Station. Evaluation of hydrogen production by water radiolysis during the process is important for a safe operation. Thus, hydrogen production from the mixture of zeolite and seawater was studied by γ-radiolysis experiment, and the hydrogen production during the process was evaluated. The measured yield of hydrogen from seawater was comparable to the primary yield in the γ-radiolysis of water. This result indicates that oxidation of hydrogen by radical products of water radiolysis is not effective in seawater. The measured yield from the mixture decreased at a high weight fraction of zeolite. However, the measured yield was higher than that expected from the direct radiolysis of water in the mixture, which would decrease proportionally to the weight fraction of water. This result suggests that the radiation energy deposited on zeolite is involved in hydrogen formation. From the measured yields, the hydrogen production rate was evaluated to be 3.6 mL/h per ton of radioactive water before the process and 1.5 L/h per ton of the waste adsorbent after the process.

著者

山田 禮司 永石 隆二 北辻 章浩 籏野 嘉彦 熊谷 友多

出版者

独立行政法人日本原子力研究開発機構

雑誌

基盤研究(B)

巻号頁・発行日

2005

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酸化物や金属を添加した水溶液に放射線を照射することで誘起される化学反応に関する実験研究を行い、光触媒反応が困難な広いバンドギャップ(5-10eV)をもつアルミナ、ジルコニア等の酸化物を硫酸水溶液に添加し、0.4モル付近の最適濃度で、高い水素生成反応収率や金属イオンの還元収率を実現することができた。放射線触媒反応機構に関して、酸化物添加と金属添加での水素生成反応の差異や表面反応等に関する知見を得た。