概況報告(2004年1月3月) 高速増殖炉燃料の研究開発、高速増殖炉燃料再処理技術の研究開発、環境保全技術開発

None

無藤 克己; 小圷 正之; 中澤 修 ; 須黒 寿康; 加藤 浩

Katsumi, Muto,; Koakutsu, Masayuki; Nakazawa, Osamu; Hayafune, Hiroki; Kato, Hiroshi

サイクル機構技報第23号に、平成15年度第4四半期の「業務概況｣として以下の事項を報告する。・高速増殖炉燃料の研究開発の現状・高速増殖炉燃料再処理技術の研究開発の現状・環境保全技術開発の現状

The application of the fluoride volatility process in the reprocessing of fuel from the fast breeder reactor is regarded as one of the economical methods. Plutonium hexafluoride (PuF6), however, reacting with fluorine (F2) and plutonium dioxide (PuO2) as the raw material, is in an unstable condition and tends to remain as a solid compound in the process after decomposing into plutonium tetrafluoride (PuF4). Suitable conditions should be established for the practical use of this process. One of them is to enhance the stability of PuF6. The behaviour of plutonium fluorination and relevant chemical reactions were investigated by referring to sundry literature and by thermodynamic calculation. It was then compared with recent data from laboratory scale experiments for this paper. Results from the theoretical analysis agreed with experimental observation that PuF6 could be formed stably under a high temperature condition (approx.1000 K) with over supply of figher concentration of F2.