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Sato, Nobuaki*; Kirishima, Akira*; Sasaki, Takayuki*; Takano, Masahide; Kumagai, Yuta; Sato, Soichi; Tanaka, Kosuke
Current Location of Fuel Debris Chemistry, 178 Pages, 2023/11
Considerable efforts have been devoted to the decommissioning of the TEPCO's Fukushima Daiichi Nuclear Power Station (1F) and now the retrieval of fuel debris is being proceeded on a trial basis. It can be said that the succession of science and technology related to debris, that is, human resource development, is important and indispensable. For that reason, we thought that a specific textbook on decommissioning is necessary. Regarding the 1F fuel debris, we still do not know enough, and it would be difficult to describe the details. However, 12 years have passed since the accident, and we have come to understand the situation of 1F to a certain extent. At this stage, it is essential for future development to organize the current situation by combining examples of past severe accidents. Therefore, we presented in this book the current state of fuel debris chemistry research from the perspectives of solid chemistry, solution chemistry, analytical chemistry, radiochemistry, and radiation chemistry.
Okamoto, Yoshihiro; Yaita, Tsuyoshi
Bunseki, 2015(11), p.478 - 485, 2015/11
Utilization of synchrotron radiation based technique in the chemical analysis of environmental samples were reviewed. At first, the environmental samples were defined as follows, (1) elements contained in the samples are unknown, (2) chemical form of the elements are also unknown and (3) distribution of the chemical species are unknown. To elucidate these chemical state information, fluorescence X-ray analysis, fluorescence based XAFS and imaging XAFS technique were introduced by using some examples.
December 1988JAERI-M 89-058, 342 Pages, 1989/05
no abstracts in English
Bunseki Kagaku, 22(12), p.1642 - 1652, 1973/12
no abstracts in English
Nihon Genshiryoku Gakkai-Shi, 8(1), p.48 - 51, 1966/00
no abstracts in English
*
Bunseki Kagaku, 9(10), P. 894, 1960/00
no abstracts in English
Kazama, Hiroyuki; Sekio, Yoshihiro; Maeda, Koji; Konashi, Kenji*; Abe, Chikage*; Nagai, Yasuyoshi*; Suzuki, Tatsuya*
no journal, ,
Inductively coupled plasma mass spectrometry with triple quadrupoles (ICP-MS/MS) is one of the promising techniques for rapid and highly sensitive wet analysis of fuel debris in Fukushima Daiichi Nuclear Power Plant. The collision/reaction cell technology implanted in ICP-MS/MS is available option to eliminate isobaric interferences, being expected to simplify the pretreatment of fuel debris analysis. In this study, ICP-MS/MS measurements of 
U and 
Th with collision/reaction gases were performed. On the basis of their gas reactivity, analytical methods for U will be discussed.
Kazama, Hiroyuki; Toyota, Chihiro; Onishi, Takashi; Maeda, Koji
no journal, ,
We propose a rapid analysis method for Nd using triple quadrupole inductively coupled plasma mass spectrometry (ICP-MS/MS) for quick burn-up measurement. In the conventional method, Nd-148 is used as burn-up indicator, and some complicated separation processes are required to eliminate isobaric interference from Sm. In this study, we demonstrate the discrimination of Nd/Sm using ICP-MS/MS with reaction gas for rapid Nd analysis.
瀬川 麻里子; 前田 亮; 藤 暢輔
not registered
JP, 2021-173289 
Patent licensing information
【課題】放射性同位体の化学形毎の放射線量を、長期間に亘って正確に分析可能な放射性同位体の分析方法を提供する。 【解決手段】放射性同位体の分析方法は、放射性同位体を化学形毎に分離する分離ステップ(S11)と、可視化シンチレータを介した薄層プレート及び標準光を放出する標準光シンチレータを撮像する撮像ステップ(S12)と、スポット領域の輝度値及び標準光シンチレータの領域の抽出輝度値を抽出する抽出ステップ(S13)と、標準輝度値及び抽出輝度値に基づいて、スポット領域の輝度値を補正する補正ステップ(S14)と、放射性同位体の輝度値と放射線量との予め求められた対応関係に基づいて、補正ステップで補正したスポット領域の輝度値に対応する放射線量を特定する特定ステップ(S15)とを含む。
