A Simulation of radiolysis of chloride solutions containing ferrous ion

Hata, Kuniki ; Inoue, Hiroyuki*

To investigate the effect of dissolved species from steels on the radiolysis processes of Cl $^{-}$ , radiolysis simulations of solutions containing both Cl $^{-}$ and Fe $^{2+}$ were carried out. The results showed that the generation of radiolytic products (H $_{2}$ O $_{2}$ , O $_{2}$ and H $_{2}$ ) increased mainly by the addition of Fe $^{2+}$ , and a drop in the pH was caused by the hydrolysis of Fe $^{3+}$ . This pH drop enhanced the reactivity of Cl $^{-}$ with $^{.}$ OH, which induced additional generation of H $_{2}$ O $_{2}$ and O $_{2}$ . These results show that low concentrations of Cl $^{-}$ (1 10 $^{-3}$ mol/dm $^{3}$ = 35ppm) in the presence of Fe $^{2+}$ could influence the generation of H $_{2}$ O $_{2}$ and O $_{2}$ during water radiolysis. However, it is considered that these effects of Fe $^{2+}$ and low concentration of Cl $^{-}$ on water radiolysis are less important for corrosion of steels due to the low concentrations of H $_{2}$ O $_{2}$ and O $_{2}$ generated. The other process, such as dissolution of iron enhanced by FeOOH, might predominantly induce corrosion under the conditions of solutions with low concentrations of H $_{2}$ O $_{2}$ and O $_{2}$ .

Language	:	English
Journal	:	Journal of Nuclear Science and Technology
Volume	:	56
Number	:	9-10
Pages	:	p.842 - 850
Publication Year/Month	:	2019/09
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Paper URL	:	https://doi.org/10.1080/00223131.2019.1585986
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Keywords	:	放射線分解; 塩化物イオン; 鉄イオン
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Cooperating Institute	:	大阪府立大学

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Registration No. : AA20180387
JAEA Abstracts No. : 47001606
Paper Submission No. : 22215

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