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Corrosion tests of reactor vessel steels in diluted seawater under $$gamma$$ rays irradiation, 2; Effects of N$$_{2}$$ atmosphere at 50$$^{circ}$$C

Nakano, Junichi; Tsukada, Takashi ; Yamagata, Ryohei

In primary containment vessels (PCVs) of the Fukushima Daiichi Nuclear Power Station (1F-NPS), it is considered that corrosion of PCV and reactor pressure vessels is accelerated by seawater injection into the reactor cores and an increase in radiation dose. To investigate effects of water radiolysis on corrosion and measures to suppress corrosion, corrosion tests were conducted in diluted seawater at 50 $$^{circ}$$C under $$gamma$$ rays irradiation. In the 2013 fall meeting, it has been reported that weight loss reduced in diluted seawater containing hydrazine (N$$_{2}$$H$$_{4}$$) 100 mg/L in N$$_{2}$$ atmosphere. To confirm a contribution of N$$_{2}$$ atmosphere, corrosion test was conducted in diluted seawater without N$$_{2}$$H$$_{4}$$ in N$$_{2}$$ atmosphere. When air was replaced with N$$_{2}$$ in the flask, weight loss, O$$_{2}$$ and H$$_{2}$$O$$_{2}$$ concentrations in diluted seawater decreased.

Language

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Japanese

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Publication Year/Month

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Meeting title

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日本原子力学会2014年春の年会

Held date

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2014/03

Location (city)

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東京

Location (country)

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日本

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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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