[1D01-05] Chemistry of Cesium

[1D04] Investigation of in-reactor cesium chemical behavior in TEPCO's Fukushima Daiichi Nuclear Power Station accident

(12)Analysis of nuclides in samples collected from primary containment vessel of Unit 1

*Kazuki Morishita^1,2, Takashi Onishi^1,2, Koji Maeda^1,2, Masato Mizokami³, Kenichi Ito³, Shinya Mizokami³ (1. IRID, 2. JAEA, 3. TEPCO HD)

Keywords:Fukushima Daiichi Nuclear Power Station accident, Alpha spectrometry, Gamma-ray spectrometry, Inductively Coupled Plasma Mass Spectrometry

Samples, collected from primary containment vessel of Fukushima Daiichi Unit 1, were immersed in nitric acid. Immersed solutions were analyzed by alpha spectrometry, gamma-ray spectrometry and ICP-MS. Analyses provided similar results with the past measurement and suggest small amount of Pu, Am, and Cm.