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Miyamoto, Yutaka
Hoshaka Bunseki Handobukku, 7 Pages, 2004/00
no abstracts in English
Miyamoto, Yutaka; Saito, Yoko; Magara, Masaaki; Usuda, Shigekazu
Journal of Radioanalytical and Nuclear Chemistry, 255(3), p.553 - 557, 2003/03
Times Cited Count：4 Percentile：31.59(Chemistry, Analytical)To investigate the effect of weather on the composition of the dust and the possible origin of the dust, the elemental composition airborne dust was determined by INAA. The analyzed elements could be classified into 3 groups by the variation of concentration in the samples. The difference in concentration pattern may reflect the effect of rainfalls.
Miyamoto, Yutaka
Hoshaka Bunseki, (14), p.16 - 22, 2002/05
no abstracts in English
Sasajima, Fumio; Sawahata, Hiroyuki*; Onizawa, Koji*; Ichimura, Shigeju; Otomo, Akitoshi; Ito, Yasuo*; Takayanagi, Masaji
JAERI-Tech 2000-073, 49 Pages, 2000/12
JAERI-Tech-2000-073.pdf:4.43MB
no abstracts in English
-ray analysis with guided neutron beams comparing to NAAYonezawa, Chushiro; Matsue, Hideaki
Journal of Radioanalytical and Nuclear Chemistry, 244(2), p.373 - 378, 2000/05
Times Cited Count：12 Percentile：62.12(Chemistry, Analytical)no abstracts in English
Yonezawa, Minoru
no journal, ,
The Japan Atomic Energy Agency constructed "Fukushima Nuclear Accident Archive (FNAA)" and started its operation in June 2013. We started to develop FNAA in order to support R&D activities related to Fukushima Nuclear Accident and started to collect information of Internet information from government, etc as well as research results presented at related conferences. We cooperate with Web Archiving Project (WARP) of the National Diet Library (NDL) and make use of the Nuclear Accident Taxonomy developed by the International Atomic Energy Agency. We also cooperate with databases inside/outside Japan to increase access route to FNAA. We send metadata of FNAA to NDL Great East Japan Earthquake Archive (HINAGIKU) and International Nuclear Information System (INIS). Activities, issues and future plans are reported.
Kondo, Kosuke*; Yoneyama, Kai*; Sato, Isamu*; Matsuura, Haruaki*; Suzuki, Eriko; Miwa, Shuhei
no journal, ,
The aim of this study is to develop a method to evaluate the effect of Si and Al content on Cs leaching behavior from concrete by combining Instrumental Neutron Activation Analysis (INAA), Particle Induced X-ray Emission (PIXE) and Atomic Absorption Spectrometry (AAS). It could be quite useful for evaluation of radiation source distribution in decommissioning work of 1F and evaluation of radioactivity of dismantled wastes. In this presentation, the research plan and the applicability of INAA based on the measurement results of low-concentration Cs in concrete samples are shown.
Suzuki, Hideya*; Shimojo, Kojiro; Emori, Tatsuya; Tsutsui, Nao; Kurosawa, Tatsuya*; Shibata, Mitsunobu*; Kawasaki, Tomohiro*; Ban, Yasutoshi
no journal, ,
The Japan Atomic Energy Agency (JAEA) has been studying partitioning and transmutation (P&T) systems. In P&T, JAEA proposed a novel hydrometallurgical process called "SELECT (Solvent Extraction from Liquid waste using Extractants of CHON-type for Transmutation) process". In the process, the separation of minor actinide (MA) from the chemically similar Rare earth elements (RE) is the key step. New acidic amide-type extractants, called TONAADA (Tetraoctyl nitriloacetic acid diacetamide) have been developed by JAEA. In this study, solvent extraction tests were performed using TONAADA, THNAADA (hexyl-type), and B-TONAADA (branched side chain type). As a result, the separation of MA from the nitric acid solution was achieved with high separation factor.
Suzuki, Hideya*; Shimojo, Kojiro; Nakamura, Satoshi; Emori, Tatsuya; Kurosawa, Tatsuya*; Shibata, Mitsunobu*; Kawasaki, Tomohiro*; Ban, Yasutoshi
no journal, ,
The Japan Atomic Energy Agency (JAEA) has been studying partitioning and transmutation (P&T) systems. In P&T, JAEA proposed a novel hydrometallurgical process called "SELECT (Solvent Extraction from Liquid waste using Extractants of CHON-type for Transmutation) process" for nuclear fuel reprocessing and minor actinides (MA) separation. In this study, a new MA separation method was investigated to further improve the efficiency of the SELECT process. Batch tests were conducted in a mixed solvent system using the acidic amide-type extractants nitrilotriacetic acid diacetamide with branched side chains (B-TONAADA) and alkyl diamidoamine (ADAAM). As a result, we found an efficient method for separating only americium (Am) from an aqueous nitric acid solution containing MA and rare earth elements by adjusting nitric acid concentration.
Nakamura, Satoshi; Suzuki, Hideya*; Ishii, Sho*; Emori, Tatsuya; Kurosawa, Tatsuya*; Shibata, Mitsunobu*; Shimojo, Kojiro; Ban, Yasutoshi
no journal, ,
To reduce volume and radiotoxicity of high-level radioactive waste, JAEA has been developing a separation process called "SELECT" (Solvent Extraction from Liquid-waste using Extractants of CHON-type for Transmutation) for recovering minor actinides (MA) from high-level radioactive liquid-waste. In this study, the applicability of an acidic diamide-type extractant Branched-TetraOctylNitriloAceticAcidDiAmide (B-TONAADA) was investigated with a view to improving the efficiency of MA/Rare Earth Elements (RE) separation in SELECT process. As a results of extraction tests performed with different nitric acid concentrations, specific changes were observed in the lanthanide patterns of distribution ratios, and the distribution ratios of MA were higher than those of RE over a wide range of nitric acid concentrations.
