Basic study on remote analysis for low-decontaminated TRU fuel by combination of laser induced breakdown spectroscopy (LIBS) and ablation initiated resonance absorption spectroscopy (AIRAS)

Wakaida, Ikuo  ; Akaoka, Katsuaki ; Oba, Masaki ; Maruyama, Yoichiro; Miyabe, Masabumi   ; Otobe, Haruyoshi  ; Niki, Hideaki*; Katsumura, Soichiro; Seya, Michio

Basic study on remote analysis by combination of LIBS and AIRAS were performed. For the impurity measurement, detection linearity to % order, the detection limit of order 100 ppm and the error of about 3% based on statistical fluctuation were obtained by the use of Lanthanide or Uranium oxide sample. For the isotope analysis, by using the laser system specialized for the resonance spectroscopy, spectrum resolution of 800 MHz was performed and U in natural uranium was clearly detected. These results suggest that the combination of LIBS and AIRAS will be one of the alternative techniques applicable for the safeguards analysis of next generation fuels without neutron detection by He gas. In the next stage, we are going to apply this remote analysis to the measurement of Pu in MOX fuel. In this program, we develop the compact system inside the grove-box and will plan to accomplish the elemental and isotopic analysis of Pu and U within several ten minutes.