Effect of chloride and bromide ion on the concentration of hydrogen peroxide produced from seawater radiolysis

Hata, Kuniki ; Hanawa, Satoshi ; Motooka, Takafumi; Tsukada, Takashi

Fukushima Daiichi Nuclear Power Plants experienced seawater injection into the cores and spent fuel pools as an emergent measure for a short period after the accident. The injected seawater was exposed to radiation, and radiolytic species were produced. Especially, hydrogen peroxide (H $_{2}$ O $_{2}$ ) is known as an oxidant which affects corrosion of materials. In order to identify the important factor which results in the high concentration of H $_{2}$ O $_{2}$ in seawater radiolysis, the concentrations of H $_{2}$ O $_{2}$ in -irradiated artificial seawater was measured and compared with the result of radiolysis calculation. Solutions containing some constituents of seawater were also measured to identify which ion affects H $_{2}$ O $_{2}$ production of seawater radiolysis. The experimental results showed that the H $_{2}$ O $_{2}$ production from seawater radiolysis is mainly attributed to reactions of Cl $^{-}$ and Br $^{-}$ in water radiolysis, though many kinds of ions are dissolved in seawater.

Language	:	English
Journal	:	JAEA-Review 2014-050, JAEA Takasaki Annual Report 2013
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Pages	:	P. 22
Publication Year/Month	:	2015/03
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Paper URL	:	https://doi.org/10.11484/jaea-review-2014-050
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Keywords	:	福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident
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Registration No. : AA20140178
JAEA Abstracts No. :
Paper Submission No. : 20023

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