Radiolytic Oxidation Behavior of Neptunium in Sodium Chloride Solutions.

• FUKASAWA Tetsuo

  Power & Industrial Systems R&D Division, Hitachi, Ltd.

• LIERSE Christoph

  Institut fur Radiochemie, Technische Universitat Munchen

• KIM Jael I.

  Institut fur Radiochemie, Technische Universitat Munchen

書誌事項

タイトル別名

• Radiolytic Oxidation Behavior of Neptun

抄録

<BR>Radiolytic oxidation behavior of neptunium was investigated in order to predict its migration behavior at the disposal site for radioactive waste. Neptunium, in 5 mol/dm3 sodium chloride solutions of several pH values, was irradiated by α-particles of 238Pu which had been placed in the solutions as dioxide powder. Solution neptunium redox behavior was compared with that of an unirradiated sample. Pentavalent neptunium, which was stable in the absence of 238Pu, was found to be oxidized to hexavalent and even to heptavalent neptunium. Oxidizing species would be chloride molecule anion (Cl2- ) and/or hypochlorite anion (CiO-) which were generated by the reaction between radiolytically generated hydroxide radical (OH) and chloride ion (Cl-). The oxidation rate of pentavalent neptunium was independent of its concentration, but dependent on solution pH. The measured rate constant was (19±4) [H] mol/dm3/d.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　Ｎｕｃｌｅａｒ　Ｓｃｉｅｎｃｅ　ａｎｄ　Ｔｅｃｈｎｏｌｏｇｙ（日本原子力学会英文論文誌）

  Ｊｏｕｒｎａｌ　ｏｆ　Ｎｕｃｌｅａｒ　Ｓｃｉｅｎｃｅ　ａｎｄ　Ｔｅｃｈｎｏｌｏｇｙ（日本原子力学会英文論文誌） 33 (6), 486-491, 1996

  一般社団法人 日本原子力学会

キーワード

• neptunium
• radiolysis
• oxidation
• valence state
• sodium chloride
• OH radical
• pH value
• rate constant
• plutonium 238
• radiation chemistry

詳細情報

• CRID: 1390282679070443008
• NII論文ID: 10002074936
• NII書誌ID: AA00703720
• DOI: 10.3327/jnst.33.486
• COI: 1:CAS:528:DyaK28XksVyru78%3D
• ISSN: 18811248
• ISSN: 00223131
• NDL書誌ID: 4060397
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4060397
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可