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Corrosion of carbon steel and low-alloy steel in diluted seawater containing hydrazine under $$gamma$$-rays irradiation

Nakano, Junichi; Yamamoto, Masahiro ; Tsukada, Takashi 

The seawater was injected into reactor cores of Units 1, 2 and 3 in the Fukushima Daiichi Nuclear Power Plant. To investigate effects of $$gamma$$ rays irradiation on corrosion of carbon steel and low alloy steel, corrosion tests were performed in the diluted seawater at 50 $$^{circ}$$C under $$gamma$$ rays irradiation with dose rates of 4.4 kGy/h and 0.2 kGy/h. Hydrazine (N$$_{2}$$H$$_{4}$$) was added to the diluted seawater. In the diluted seawater without N$$_{2}$$H$$_{4}$$, the weight losses of the steels irradiated with 0.2 kGy/h were similar to those of the unirradiated steels, and the weight losses of the steels irradiated with 4.4 kGy/h increased to approximate 1.7 times of those of the unirradiated steels. The weight losses of the steels irradiated in the diluted seawater containing N$$_{2}$$H$$_{4}$$ were similar to those in the diluted seawater without N$$_{2}$$H$$_{4}$$. When N$$_{2}$$ was introduced to gas phase in the flasks during $$gamma$$ rays irradiation, the weight losses of the steels decreased.

Language

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Japanese

Journal

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Nihon Genshiryoku Gakkai Wabun Rombunshi

Volume

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13

Number

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1

Pages

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p.1 - 6

Publication Year/Month

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2014/03

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Held date

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Location (country)

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Patent information

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PDF

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Paper URL

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https://doi.org/10.3327/taesj.J13.015

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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コバルト60照射施設

Press Release

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Article of JAEA R&D Review

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Cooperating Institute

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Accesses

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- Accesses

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