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原子力再処理工程管理における溶液分析へのレーザー誘起ブレークダウン分光法の適用可能性

Application of laser-induced breakdown spectroscopy method for elements analysis of metal ions in an aqueous solution in nuclear reprocessing process control

大場 弘則; 佐伯 盛久; 若井田 育夫 

Oba, Hironori; Saeki, Morihisa; Wakaida, Ikuo

レーザー誘起ブレークダウン分光(LIBS)は前処理無しで迅速、その場、遠隔で元素組成を決定することができる魅力的な手段である。LIBSは工程管理や環境測定における液体柱の溶存元素に適用できる。本稿では、液体へのLIBS適用例や、適用時の問題点とその解決方法を解説するとともに、原子力再処理工程における放射性溶液の物質移動監視へのLIBS適用可能性検討として実施した、高レベル放射性廃液模擬溶解液を用いたLIBS分析例について紹介する。

Laser-induced breakdown spectroscopy (LIBS) is an attractive technique for determining elemental composition in real time, in-situ and remotely without any sample preparation. The LIBS analysis of metal ions in an aqueous solution is available in process control and environmental monitoring. In the present paper, we have reviewed the LIBS methods for a liquid phase that tried to improve the detection sensitivity. We have performed the LIBS measurement with the sheet flow for the simultaneous determination of elements in the simulated high-level radioactive waste liquid and have discussed on the application possibility as a tool for online process monitoring.

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