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Effects of hydrazine addition and N$$_{2}$$ atmosphere on the corrosion of reactor vessel steels in diluted seawater under $$gamma$$-rays irradiation

Nakano, Junichi; Kaji, Yoshiyuki  ; Yamamoto, Masahiro ; Tsukada, Takashi 

Seawater was injected into the reactor cores in the Fukushima Daiichi Nuclear Power Station. Corrosion of reactor vessel steels is considered to progress. To evaluate durability of the reactor vessel steels, corrosion tests were conducted in diluted seawater at 50 $$^{circ}$$C under $$gamma$$-rays irradiation. 10 mg/L and 100 mg/L N$$_{2}$$H$$_{4}$$ were added to diluted seawater. Without addition of N$$_{2}$$H$$_{4}$$, weight loss in the vessel steels irradiated with the 0.2 kGy/h dose rate was comparable with those without irradiation and weight loss in the vessel steels irradiated with the 4.4 kGy/h dose rate was higher than those without irradiation. Under irradiation, weight loss in the vessel steels in diluted seawater containing N$$_{2}$$H$$_{4}$$ was comparable with that in diluted seawater without N$$_{2}$$H$$_{4}$$. When gas phase in the flask was replaced with N$$_{2}$$, weight loss in the vessel steels, and O$$_{2}$$ and H$$_{2}$$O$$_{2}$$ concentrations in the diluted seawater decreased.

Language

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English

Journal

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Journal of Nuclear Science and Technology

Volume

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51

Number

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7-8

Pages

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p.977 - 986

Publication Year/Month

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2014/07

Meeting title

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Held date

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Location (city)

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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/10.1080/00223131.2014.890917

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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Maintaining the Integrity of the Reactor Vessel until the Completion of Fuel Removal; The Influence of Radiation on the Corrosion of Vessel Steels and Corrosion Measures[/]

Cooperating Institute

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Accesses

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- Accesses

InCites™

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Percentile:30.92

Category:Nuclear Science & Technology

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