[2F01-05] Fuel Debris 4

[2F05] Establishment of Characterization Method for Small Fuel Debris Using the World’s First Isotope Micro Imaging Apparatus

(5) Micro-Area Isotope Composition Analysis of Fukushima Daiichi Nuclear Power Plant Contaminant

*Takeru Yoshida¹, Yoshihiro Sekio¹, Koji Maeda¹, Masato Morita², Tetsuo Sakamoto², Masato Mizokami³, Mutsumi Hirai³ (1. JAEA, 2. Kogakuin Univ., 3. TEPCO HD)

Keywords:Fuel Debris, FIB-TOF-SIMS, Isotope Anaysis, Composition Analysis, Single Particle Analysis, Uranium

In order to steadily carry out decommissioning of the Fukushima Daiichi Nuclear Power Plant (FDNPP), it is extremely important to understand the properties of fuel debris. In the past, analytical methods such as SEM-EDS, TEM and ICP-MS have been used to determine the properties of fuel debris. However, these analytical methods cannot obtain information on the local isotopic composition of the sample. FIB-TOF-SIMS, which the authors are developing, is expected to be a useful analytical method for determining the properties of fuel debris because it allows local isotopic composition analysis. In this study, we conducted analysis in a micro-area of FDNPP contaminated sample and succeeded in obtaining isotopic composition imaging of Li, B, and U from the measured particulates.