[1O11-14] Nuclear Materials 2

4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)

[1O11] X-ray analysis for radioactive particles from Fukushima Daiichi Nuclear Power Plant using synchrotron radiation at SPring-8(1) Development of measuring technique

*Hajime Tanida¹, Tohru Kobayashi¹, Masaaki Kobata¹, Shin-ichi Fujimori¹, Yoshihiro Okamoto¹, Tetsuo Okane¹, Tsuyoshi Yaita¹, Toshihiko Satou², Shingo Suzuki³, Koji Maeda³ (1. JAEA, Materials Sciences Research Center, 2. JAEA, CLADS, 3. JAEA, FMF)

Keywords:

Fukushima Daiichi Nuclear Power Plant-derived radioactive particles,Synchrotron radiation analysis,microbeam,Simultaneous measurement of the same area,XAFS/XRD/XRF

The JAEA Beamline BL22XU at SPring-8 was licensed to use nuclear fuel materials in September 2022 for the purpose of nondestructive X-ray analysis of radioactive particulates collected during an investigation inside the Fukushima Daiichi Nuclear Power Plant (1F) Unit 2 primary containment vessel (PCV) (hereinafter referred to as "radioactive particulates") using synchrotron radiation. In September 2023, we started the operation of handling nuclear fuel materials. The facility is equipped with a Kirkpatrick-Baez (KB) mirror for focusing synchrotron radiation X-rays into a microbeam, a microscope for sample observation, sample holders with kinematic mounts, a precision positioning stage, an X-ray fluorescence (XRF) detector, an X-ray absorption fine structure (XAFS) measurement system for transmission and fluorescence methods, an X-ray diffraction (XRD) system by a two-dimensional detector, enabling elemental mapping of XRF with 1 micrometer X-rays and simultaneous measurement of XAFS and XRD in the same area of incident X-rays below 35 keV.