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Radiation-induced reactions of Cl$$^{-}$$, CO$$_{3}$$$$^{2-}$$ and Br$$^{-}$$ in seawater; Model calculation of $$gamma$$ radiolysis of seawater

Hata, Kuniki ; Hanawa, Satoshi ; Kasahara, Shigeki; Muroya, Yusa*; Katsumura, Yosuke*

Fukushima Daiichi Power Plants experienced seawater injection as emergent measure for a short period after the accident. As a result of seawater injection, structural materials in the reactors are exposed to unexpected corrosion environment due to Cl$$^{-}$$ as well as radiolytic products by $$gamma$$-rays from fuels. In the present study, a model calculation on seawater radiolysis was carried out to estimate concentration of radiolytic products under $$gamma$$-irradiation. Radiolytic products, H$$_{2}$$, O$$_{2}$$ and H$$_{2}$$O$$_{2}$$, in seawater monotonically increased with dose. H$$_{2}$$ production was especially distinguished, and its yield was 4.4 $$times$$ 10$$^{-8}$$ mol J$$^{-1}$$. As similar result was obtained from the calculation of NaBr solution, the main species which increased these products in seawater was thought to be Br$$^{-}$$. On the other hand, Cl$$^{-}$$ and HCO$$_{3}$$$$^{-}$$ in seawater hardly affected the concentrations of these radiolytic products.

Language

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English

Journal

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Proceedings of 2012 Nuclear Plant Chemistry Conference (NPC 2012) (CD-ROM)

Volume

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Number

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Pages

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6 Pages

Publication Year/Month

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2012/09

Meeting title

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2012 Nuclear Plant Chemistry Conference (NPC 2012)

Held date

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2012/09

Location (city)

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Paris

Location (country)

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France

Patent information

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PDF

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Paper URL

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DOI for research data

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Keywords

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福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident

Research Facility

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Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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東京大学

Accesses

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- Accesses

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