[2I01-05] Waste Management 1

[2I02] α-emitting nuclides analysis of the stagnant water including sediments in Fukushima Daiichi NPS

(2) Detection of fine particle containing α-emitters by SEM-EDX and alpha Track

*Takumi Yomogida¹, Kazuki Ouchi¹, Shiori Morii¹, Toshitaka Oka¹, Yoshihiro Kitatsuji¹, Yoshikazu Koma¹, Katuhiro Konno² (1. JAEA, 2. TEPCO HD)

Keywords:Fukushima Dai-ichi nuclear power station, stagnant water, Alpha radionuclide, micro particles, SEM-EDX , alpha track detection, Fukushima Dai-ichi Nuclear Power Station Accident

To investigate the morphology of α-nuclides in solid fraction of the stagnant water in the Fukushima Dai-ichi nuclear Power Station's Unit 3 reactor, we tried to detect particles containing α-nuclides by scanning electron microscopy-X-ray detection (SEM-EDX) and the alpha track method. As a result of SEM-EDX observation, several sub-μm to 10 μm size particles containing U were identified. The particles containing alpha emitters were identified by alpha-track method. These particles with few hundred μm in diameter were mainly composed of iron oxide.