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Tobita, Minoru*; Haraga, Tomoko; Sasaki, Takayuki*; Seki, Kotaro*; Omori, Hiroyuki*; Kochiyama, Mami; Shimomura, Yusuke; Ishimori, Kenichiro; Kameo, Yutaka
JAEA-Data/Code 2019-016, 72 Pages, 2020/02
JAEA-Data-Code-2019-016.pdf:2.67MB
In the future, radioactive wastes which generated from research and testing reactors in Japan Atomic Energy Agency are planning to be buried for the near surface disposal. Therefore, it is required to establish the method to evaluate the radioactivity concentrations of radioactive wastes by the time it starts disposal. In order to contribute to this work, we collected and analyzed the samples generated from JRR-2, JRR-3 and Hot laboratory facilities. In this report, we summarized the radioactivity concentrations of 25 radionuclides (
H, 
C, 
Cl, 
Co, 
Ni, 
Sr, 
Nb, 
Mo, 
Tc, 
Ag, 
Sn, 
I, 
Cs, 
Eu, 
Eu, 
U, 
U, 
U, Pu, 
Pu, 
Pu, 
Pu, Am, 
Am, 
Cm) which were obtained from radiochemical analysis of those samples.
Sato, Yoshiyuki; Tanaka, Kiwamu; Ueno, Takashi; Ishimori, Kenichiro; Kameo, Yutaka
Hoken Butsuri, 51(4), p.209 - 217, 2016/12
A large amount of contaminated rubbles were generated by the accident at the Fukushima Daiichi Nuclear Power Station (F1NPS). For safe decommissioning of F1NPS, it is important to evaluate the composition and concentration of radionuclides in the rubbles. In this paper, to characterize the rubbles collected at F1NPS in Unit-1, Unit-2 and Unit-3, radiochemical analysis was operated. As a result of radiochemical analysis, 
-ray-emitting nuclides Co, Cs and 
Eu, 
-ray-emitting nuclides H, C, Sr and Tc, and 
-particle-emitting nuclides 
Pu, Am and Cm were detected. In contrast, Nb and Eu concentrations were below the detection limit. Measured radioactive concentrations implied that H, C, Co and Sr concentrations depended on Cs concentration respectively. This analysis was characterized the radioactivity concentrations of the rubbles.
Shinohara, Nobuo; Kono, Nobuaki; Suyama, Kenya; Inagawa, Jun; Nakahara, Yoshinori; Kurosawa, Setsumi; Watanabe, Kazuo; Usuda, Shigekazu; Oshima, Masumi; Katsuta, Hiroji; et al.
Radiochimica Acta, 89(3), p.135 - 138, 2001/05
Times Cited Count：2 Percentile：19.66(Chemistry, Inorganic & Nuclear)no abstracts in English
*;
Radioisotopes, 34, p.632 - 635, 1985/00
no abstracts in English
;
Nihon Kagaku Zasshi, 86(1), p.74 - 77, 1965/00
no abstracts in English
Tanaka, Kiwamu; Ueno, Takashi; Yasuda, Mari; Shimada, Asako; Hoshi, Akiko; Kameo, Yutaka
no journal, ,
no abstracts in English
Hinai, Hiroshi; Shinoda, Yoshiharu; Kurosawa, Akira; Ikeda, Akira*; Obata, Masamichi*; Shibata, Atsuhiro; Nomura, Kazunori
no journal, ,
no abstracts in English
Nagaoka, Mika; Fujita, Hiroki; Aida, Taku*; Smith, R.*
no journal, ,
Radioactivity concentration in environmental sample such as leaf, seaweed has been measured through chemical separation with organic matter decomposition and extraction of target element. However, the usual chemical treatment could affect worker's health, chemical hood and surrounding environment by usage of chemical regent. On the other hand, supercritical water reaction could decompose organic matter without health and environmental hazard caused by the regent. Therefore, we have tried to apply the supercritical water reaction to radioactivity analysis of environmental samples. In this research, organic matter content and strontium concentration in environmental sample were compared with between before and after the reaction. The organic matters were highly decomposed with the water reaction at higher temperature and for longer reaction time. However the strontium was not extracted into solution after the reaction.
Shimomura, Yusuke; Kochiyama, Mami; Haraga, Tomoko; Ishimori, Kenichiro; Kameo, Yutaka
no journal, ,
no abstracts in English
Hinai, Hiroshi; Sato, Daisuke; Myodo, Masato; Koma, Yoshikazu; Shibata, Atsuhiro; Nomura, Kazunori
no journal, ,
no abstracts in English
Aono, Ryuji; Sato, Yoshiyuki; Ishimori, Kenichiro; Kameo, Yutaka
no journal, ,
no abstracts in English
Motoyama, Risa; Hinai, Hiroshi; Ichige, Yoshiaki; Koma, Yoshikazu; Shibata, Atsuhiro
no journal, ,
no abstracts in English
Sn in radioactive rubbles by ICP-MS/MSOta, Yuki; Do, V. K.; Furuse, Takahiro; Sano, Yuichi; Iwahashi, Hiroyuki; Homma, Shunta; Ichijo, Yurina; Kurosawa, Kiyoko*; Endo, Tsubasa*; Motoki, Yoshiaki*; et al.
no journal, ,
no abstracts in English
Hinai, Hiroshi; Oki, Keiichi; Koma, Yoshikazu; Shibata, Atsuhiro
no journal, ,
no abstracts in English
Nitta, Ayako; Hinai, Hiroshi; Ichige, Yoshiaki; Koma, Yoshikazu; Shibata, Atsuhiro
no journal, ,
no abstracts in English
Motoyama, Risa; Hinai, Hiroshi; Koma, Yoshikazu; Shibata, Atsuhiro
no journal, ,
no abstracts in English
Koma, Yoshikazu
no journal, ,
no abstracts in English
Cd using liquid scintillation counterIto, Chihiro; Tanaka, Yasuyuki; Kurosawa, Kiyoko*; Motoki, Yoshiaki*; Do, V. K.; Furuse, Takahiro
no journal, ,
In this presentation, an HCl-free analytical method for Cd in aqueous solution samples containing multiple radionuclides by liquid scintillation counting is reported. We aimed to develop a chemical separation procedure of Cd from co-existing nuclides such as Co and/or 
Fe, which interfere with the beta-counting. The use of hydrochloric acid (HCl) was avoided to prevent facilities from corrosion. Accordingly, after a sample-matrix separation with a chelating disk, Cd was adsorbed on a cation exchange resin and then selectively eluted by sodium thiosulfate (Na
SO
), which has a high affinity for Cd. This developed method allowed the separation and purification of Cd from the sample matrix without the use of halogen acids.
U using ICP-MS/MSTanaka, Yasuyuki; Do, V. K.; Motoki, Yoshiaki*; Ota, Yuki; Iwahashi, Hiroyuki; Kurosawa, Kiyoko*; Furuse, Takahiro
no journal, ,
We examined the measurement method of U using triple-quadrupole inductively coupled plasma-mass spectrometry (ICP-MS/MS, Agilent 8900). The measurable mass to charge ratio (m/z) is expanded up to 275, the device can measure U
OO (m/z = 268) generated by the reaction with O, which was used as a reaction gas. This mass shift mode decreased the interference from hydride of 
U compared to the previously reported analytical method, which improved limit of detection of U using ICP-MS/MS. In this presentation, the optimized measurement condition of U measured at m/z = 268 by ICP-MS/MS is reported.
