Verification of low decontaminated/MA-contained MOX of next generation fuel cycle

Katsumura, Soichiro; Seya, Michio; Wakaida, Ikuo  

In next generation fuel fabrication facilities, low decontaminated MOX (Mixed Oxide Fuel) with MA (minor actinide) including Cm is going to be treated. In case of the low decontaminated MOX with MA, if Cm is included more than 0.01% of Pu, the amount of neutron generation from spontaneous fissions of Cm exceed that of Pu. This is because that Cm produces near 10 times higher than Pu. And also determination of Pu isotopic composition by -ray spectroscopy seems to be less-accurate or impossible, because of high back ground -rays generated by bremsstrahlung of beta-decay electrons from FPs in the low decontaminated MOX. In this presentation, the future issues of the verification of the low decontaminated MOX with MA are shown, and as one of possible verification approach, application of LIBS (Laser Induced Breakdown Spectroscopy) + AIRAS (Ablation Initiated Resonance Absorption Spectroscopy) is explained.