OS8-10 放射線誘起表面活性による高温高圧環境液滴濡れ性の向上(OS8 軽水炉・新型炉・核燃料サイクル,分散と集中の共存)

概要

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In our previous study, significant improvements of surface wettability and boiling heat transfer on oxide film coated-materials by Radiation Induced Surface Activation (RISA) phenomenon were confirmed in a room temperature condition. To delineate the RISA effect in actual boiling systems or in high-temperature and high-pressure environment, this study aimed at obtaining contact angle, an indicator of macroscopic surface wettability, of water droplet on aluminum and stainless plates before and after γ-ray irradiation at ambient temperatures up to 280℃. In condition less than 200℃, super-hydrophilicity or null contact angle was achieved after 830kGy γ-ray irradiation. On the other hand, at over 200℃, super-hydrophilicity by the RISA effect was not achieved even after 3850kGy γ-ray irradiation, although slight improvement of surface wettability was confirmed.
一般社団法人日本機械学会の論文
2006-06-28