Characterization of solidified melt among materials of UO$$_{2}$$ fuel and B$$_{4}$$C control blade
高野 公秀; 西 剛史; 白数 訓子
Takano, Masahide; Nishi, Tsuyoshi; Shirasu, Noriko
To predict phase relationships in the solidified core melt of Fukushima Daiichi Nuclear Power Plants, the solidified melt samples among core materials were prepared by arc melting. Phases and compositions in the samples were determined by X-ray diffraction, microscopy and elemental analysis. The only oxide phase formed is (U,Zr)O$$_{2}$$. The stable metallic phases are Fe-Cr-Ni alloy and Fe$$_{2}$$Zr-type (Fe,Cr,Ni)$$_{2}$$(Zr,U) intermetallic. The borides, ZrB$$_{2}$$ and (Fe,Cr,Ni)$$_{2}$$B, are solidified in the metallic part. Annealing at 1773 K under an oxidizing atmosphere resulted in the oxidation of uranium and zirconium in the alloy and ZrB$$_{2}$$, instead the (Fe,Cr,Ni)$$_{2}$$B and Fe-Cr-Ni alloy became dominant. The metallic zirconium content in the melt is found to be a key factor that determines the phase relationships. As a basic mechanical property, the microhardness of each phase was measured. The borides showed notably higher hardness than any other oxide and metallic phases.
使用言語 : English
掲載資料名 : Journal of Nuclear Science and Technology
: 51
: 7-8
ページ数 : p.859 - 875
発行年月 : 2014/07
出版社名 : Taylor & Francis
特許データ :
論文URL :
キーワード : 福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident
使用施設 :
広報プレスリリース :
: 溶けた燃料と制御棒から何ができたか; 炉心で溶融固化した燃料デブリ中の生成相と硬さを調べる[/]
受委託・共同研究相手機関 : 資源エネルギー庁
登録番号 : AA20130776
抄録集掲載番号 : 42000878
論文投稿番号 : 14535
Accesses  (From Jun. 2, 2014)
- Accesses
分野:Nuclear Science & Technology
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