Saturated pool nucleate boiling on heat transfer surface with deposited sea salts
海水塩が析出した伝熱面における飽和プール沸騰
上澤 伸一郎; 小泉 安郎; 柴田 光彦; 吉田 啓之
Uesawa, Shinichiro; Koizumi, Yasuo; Shibata, Mitsuhiko; Yoshida, Hiroyuki
The progress of the accident of Fukushima Daiichi NPS has been calculated by severe accident analysis codes, for example, MAAP, SAMPSON and so on. However, the effects of the seawater on thermal-hydraulic behavior have not been considered in these calculations, although the seawater was injected into the reactors to cool down the nuclear fuels. Saturated pool nucleate boiling heat transfer experiments with on NaCl solution, natural seawater and artificial seawater were performed to examine the effects of salts on boiling heat transfer. The experimental results indicated that boiling curves were well predicted with the Rohsenow correlation although large coalescent bubble formation was inhibited in the NaCl solution, natural seawater and artificial seawater experiments. However, calcium sulfate was deposited on the heat transfer surface in the experiments with artificial seawater. After the formation of a deposit layer, a slow surface-temperature excursion was initiated at a heat flux lower than the usual critical heat flux. We confirmed that the relationship between the salt concentrations of the artificial seawater in the bulk fluid and the vaporization rate at the surface at which the slow surface-temperature excursion initiated. This relationship suggested that if the salt concentration of the seawater exceeded 11 wt%, the deposition of calcium sulfate on the heat transfer surface occurred even if the heat flux was zero.
使用言語 : English
掲載資料名 : Journal of Nuclear Engineering and Radiation Science
: 3
: 4
ページ数 : p.041002_1 - 041002_13
発行年月 : 2017/10
出版社名 : ASME
特許データ :
PDF :
論文URL :
キーワード : Pool Boiling; Seawater; Deposition; Fukushima Daiichi Nuclear Power Station Accident; 福島第一原子力発電所事故
使用施設 :
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 : AA20170149
抄録集掲載番号 : 45001104
論文投稿番号 : 19340
Accesses  (From Jun. 2, 2014)
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