Laser remote spectroscopy for elemental and isotope analysis of nuclear fuel materials

Wakaida, Ikuo  ; Akaoka, Katsuaki ; Miyabe, Masabumi   ; Oba, Hironori  ; Otobe, Haruyoshi  ; Maruyama, Yoichiro; Kato, Masaaki; Khumaeni, A.; Tampo, Motonobu

In decommissioning of nuclear power plant especially in damaged core, development of onsite remote diagnostic methods will be strongly required for planning and the view point of the safeguard. We are now developing the remote diagnostic technique for simultaneous analysis of element and isotope ratio by the combination of laser induced breakdown spectroscopy (LIBS) and ablation resonance absorption spectroscopy. For the development of diagnostic technique, microwave assisted LIBS was studied and enhancement of emission intensity was obtained. For liquid phase sample, ultra-thin laminate flow as the target was accomplished high sensitivity. For onsite diagnostic, Optical Fiber LIBS Probe is now under construction. For analytical development, basic database of optical emission of nuclear fuel materials are indispensable for the analysis of the complex spectra. To obtain emission spectra from MOX sample, we have constructed the remote diagnostic setup in the globe box.