Application of Laser based spectroscopy for elemental and isotope analysis in nuclear engineering

Wakaida, Ikuo  ; Akaoka, Katsuaki ; Miyabe, Masabumi   ; Khumaeni, A.; Oba, Hironori  ; Saeki, Morihisa; Ito, Chikara   ; Otobe, Haruyoshi  ; Kato, Masaaki

In the next generation nuclear fuel cycle, low-decontaminated fuel with TRU will be strongly required, and convenience, quick analytical techniques will be necessary. Simultaneous analysis of element and isotope by the combination of Laser Induced Breakdown Spectroscopy (LIBS) and Ablation Resonance Absorption Spectroscopy was demonstrated. For elemental analysis, detection lower limit of 1000 ppm of Pu in U oxide and relative error under 5% have been obtained within 5 min. For isotope analysis, Pu and Pu have been observed completely separated, and detection lower limit of several 10 ppm and error under 1% have been accomplished. A simple antenna coupled microwave assisted LIBS was performed and the enhancement of emission intensity of several 10 times was demonstrated. For liquid sample, ultra-thin laminate flow as the laser focused target was accomplished high sensitivity of ppb. For in-situ monitoring, Optical Fiber LIBS Probe by radiation resistant optical fiber is under construction.