Conversion Reactions of Metal Chlorides into Oxides with Boric Acid Applicability to the Vitrification of Molten Salt Wastes

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Conversion reactions of metal chlorides into oxides with boric acid (H<SUB>3</SUB>BO<SUB>3</SUB>) were studied to develop the method for vitrification of radioactive molten salt wastes generated in the pyroreprocessing process. Mixtures of metal chlorides and H<SUB>3</SUB>BO<SUB>3</SUB> with appropriate compositions in Pt crucible were heated at 1, 000°C for 1h in an electric furnace, followed by rapid cooling to room temperature. The chloride compounds used were LiCl, NaCl, KCl, CsCl, SrCl<SUB>2</SUB>, BaCl<SUB>2</SUB>•2H<SUB>2</SUB>O, and CeCl<SUB>3</SUB>•6H2O. All chlorides other than CsCl were found to be transformed into oxides (borate glass) in the molar ratios of H<SUB>3</SUB>BO<SUB>3</SUB>/chlorides ?? 2. Furthermore, four-component systems, i.e., the mixtures of LiCl, KCl, NaCl (or SrCl<SUB>2</SUB>, BaCl<SUB>2</SUB>•2H<SUB>2</SUB>O, CeCl<SUB>3</SUB>•6H<SUB>2</SUB>O), and H<SUB>3</SUB>BO<SUB>3</SUB> were also examined in a similar manner. The borate glasses were found to be formed in the molar ratio of H<SUB>3</SUB>BO<SUB>3</SUB>/chlorides ?? 2.

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  • Journal of nuclear science and technology  

    Journal of nuclear science and technology 32(11), 1138-1145, 1995-11-25 

    Atomic Energy Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002073612
  • NII書誌ID(NCID)
    AA00703720
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00223131
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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