Method for fixing metallic sodium in glass form

    公开(公告)号:JP2004037458A

    公开(公告)日:2004-02-05

    申请号:JP2003174716

    申请日:2003-06-19

    Abstract: PROBLEM TO BE SOLVED: To provide a method for fixing metallic sodium in glass form and more particularly to seal the metallic sodium containing radioactive elements.
    SOLUTION: This method includes an introduction process of introducing vitrified matrix precursor, sodium in metallic state, and iron oxide Fe
    2 O
    3 , in amount sufficient to ensure oxidation of the metallic sodium introduced into a reactor in a dispersed form; a mixing process of producing homogeneous mixture; a heating process heating the mixture obtained to a temperature of between 1,000 and 1,600°C, whereby the homogeneous mixture in molten state is formed, in which the sodium initially introduced is in the sodium oxide state; and a cooling process of recovering the molten mixture obtained by the heating process and cooling it, whereby the vitrified matrix of homogenous composition is obtained that incorporates the initially introduced sodium as constituent oxide of the said vitrified matrix.
    COPYRIGHT: (C)2004,JPO

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