Analysis of alpha radionuclide in the contaminated water at the torus room of unit #2 reactor of Fukushima Daiichi NPS, 1; Outline of the state analysis of alpha radionuclides containing in the solid component

Kitatsuji, Yoshihiro  ; Ouchi, Kazuki  ; Yomogida, Takumi   ; Oka, Toshitaka   ; Nitta, Ayako; Hinai, Hiroshi; Koma, Yoshikazu  ; Konno, Katsuhiro*

In order to clarify the chemical species of alpha nuclides in the contaminated water of the Fukushima Daiichi Nuclear Power Station, sludge was classified by particle size. The concentration of alpha radioisotope was measured and the particles were investigated. Most alpha particles were larger than 10 micrometers and settled at the bottom of the torus chamber.