Preparation of Hexavalent Americium in Nitric Acid Solution.

• KAMOSHIDA Mamoru

  Energy Research Laboratory, Hitachi, Ltd.

• FUKASAWA Tetsuo

  Energy Research Laboratory, Hitachi, Ltd.

• KAWAMURA Fumio

  Energy Research Laboratory, Hitachi, Ltd.

抄録

Fundamental investigations on preparation of Am(VI) in nitric acid solutions of various concentrations were carried out in order to develop a partitioning method for americium from high level liquid waste generated from the reprocessing of spent fuel. A mixture of ammonium peroxodisulfate and silver nitrate was used as oxidizing reagent. The yields of Am(VI) were determined as a function of the concentrations of nitric acid (0.01-2M) and oxidizing reagent (0.1-2M) and temperature (55-85°C). The yield of Am(VI) decreased with increasing concentration of nitric acid. In 1M nitric acid solution, increasing the concentration of ammonium peroxodisulfate resulted in increased of Am(VI) yield. When 1.5M ammonium peroxodisulfate and 0.01M silver nitrate were used, 90% of the americium in 1M nitric acid solution was oxidized to the hexavalent state at 85°C.

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） 32 (8), 779-786, 1995

  一般社団法人 日本原子力学会

キーワード

• americium
• partitioning method
• valence control
• oxidation
• valence state
• nitric acid
• ammonium peroxodisulfate
• silver nitrate
• pH value
• separation process
• temperature range 0273-0400K

詳細情報

• CRID: 1390282679070475648
• NII論文ID: 10002072941
• NII書誌ID: AA00703720
• DOI: 10.3327/jnst.32.779
• COI: 1:CAS:528:DyaK2MXotFOkurs%3D
• ISSN: 18811248
• ISSN: 00223131
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可