[1H04-08] Radionuclide Inventory / Chemical Form

[1H08] Investigation of the existence form of C-14 in PWR

(3)Study on chemical form of the insoluble C-14 in particle samples of actual plant coolant .

*Kenichiro Kino¹, Akira Sakashita², Koutaro Nakata³, Shintaro Tsuji⁴, Toshikazu Waki⁴ (1. Nucler Development Corporation, 2. Mitsubishi Heavy Industries,LTD, 3. Central Research Institute of Electric Power Industry, 4. Kansai Electric Power Co,INC)

Keywords:insoluble C-14, thermogravimetric / mass spectrometry, FT-IR

In order to aid evaluation of C-14 transport behavior in buried environment, the particulate C-14 produced in PWR was sampled and the relation between the decomposition temperature of particulate C-14 and the release component was confirmed by thermogravimetric mass spectrometry (TG / MS) . As a result, it was confirmed that a component having an aromatic ring structure released by thermal decomposition, but most of C-14 did not volatilize in an inert gas and C-14 existed in further carbonized components.