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Recession of ZrO$$_{2}$$ scale on fuel tube cladding by the melt of control rod assemble

Nakajima, Shotaro*; Matsuura, Suguru*; Nanko, Makoto*; Kurata, Masaki ; Pham, V. H.   

For a better understanding of the Fukushima-Daiichi Nuclear Power Plant accident, a reaction model of core melting process is very important. In this study, oxidized Zry plates were soaked into molten SS-B$$_{4}$$C mixture and heated into Ar gas at 1200$$^{circ}$$C. Recession of ZrO$$_{2}$$ scale was observed in the both cases. An oxygen solid solution region in the Zry sample was observed below ZrO$$_{2}$$ scale, although it was not observed in Zry oxidized at 600$$^{circ}$$C in high temperature steam conditions. When oxygen supply from the surrounding was halted, ZrO$$_{2}$$ scale can be reduced at high temperature such as 1200$$^{circ}$$C by oxygen dissolution into Zry inside.

Language

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English

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Meeting title

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International Symposium on High-Temperature Oxidation and Corrosion 2018 (ISHOC 2018)

Held date

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2018/10

Location (city)

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Matsue

Location (country)

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Japan

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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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Accesses

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- Accesses

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