[3B05-08] Deburis 6

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)

[3B07] Analysis of fuel debris obtained from inside the pedestal of Unit 2 of Fukushima Daiichi Nuclear Power Station(7) Chemical state and structural analysis of surface region on fuel debris using synchrotron radiation

*Masaaki Kobata¹, tohru Kobayashi¹, Fukuda Tatsuo¹, Goro Shibata¹, Ikuto Kawasaki¹, Toru Kitagaki¹, Shingo Suzuki¹, Koji Maeda¹, Masato Mizokami², Shinya Mizokami² (1. JAEA, 2. TEPCO HD)

Keywords:

Fukushima Daiichi Nuclear Power Station,fuel debris,synchrotron radiation,chemical state,crystal structure,surface

Synchrotron-based XAFS and XRD analyses were performed on the near-surface region of fuel debris that had been exposed to water for an extended period. The results revealed characteristic oxidation behavior, including a loss of crystallinity and an increase in the oxidation state of uranium.