Hard X-ray photoelectron spectroscopy study for transport behavior of CsI in heating test simulating a BWR severe accident condition; Chemical effects of boron vapors
BWRシビアアクシデント条件を模擬した加熱試験におけるCsIの移行挙動の硬X線光電子分光による研究; ホウ素蒸気の化学影響
岡根 哲夫; 小畠 雅明; 佐藤 勇*; 小林 啓介*; 逢坂 正彦; 山上 浩志
Okane, Tetsuo; Kobata, Masaaki; Sato, Isamu*; Kobayashi, Keisuke*; Osaka, Masahiko; Yamagami, Hiroshi
Transport behavior of CsI in the heating test, which simulated a BWR severe accident, was investigated by hard X-ray photoelectron spectroscopy (HAXPES) with an emphasis on the chemical effect of boron vapors. CsI deposited on metal tube at temperatures ranging from 150$$^{circ}$$C to 750$$^{circ}$$C was reacted with vapor/aerosol B$$_2$$O$$_3$$, and the chemical form of reaction products on the sample surface was examined from the HAXPES spectra of core levels, e.g., Ni 2p, Cs 3d and I 3d levels, and valence band. For the samples at $$sim$$300$$^{circ}$$C, while the chemical form of major product on the sample surface without an exposure to B$$_2$$O$$_3$$ was suggested to be CsI from the HAXPES spectra, an intensity ratio of Cs/I was dramatically reduced at the sample surface after the reaction with B$$_2$$O$$_3$$. The results suggest the possibility of significant decomposition of deposited CsI induced by the chemical reaction with B$$_2$$O$$_3$$ at specific temperatures.
使用言語 : English
掲載資料名 : Nuclear Engineering and Design
: 297
:
ページ数 : p.251 - 256
発行年月 : 2016/02
出版社名 : Elsevier
特許データ :
PDF :
論文URL :
キーワード : BWR; severe accident; transport behavior; Cesium; Iodine; Boron; hard X-ray photoelectron spectroscopy
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広報プレスリリース :
論文解説記事
(成果普及情報誌)
:
受委託・共同研究相手機関 :
 
登録番号 : AA20150758
抄録集掲載番号 : 44000736
論文投稿番号 : 17351
Accesses  (From Jun. 2, 2014)
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パーセンタイル:100
分野:Nuclear Science & Technology
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