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Kusaka, Ryoji
Bunko Kenkyu, 67(6), p.239 - 240, 2018/12
A spectroscopic technique for analysis developed by collaboration between Japan Atomic Energy Agency (JAEA) and Quantum and Radiological Science and Technology (QST) is discussed for readers outside the field of nuclear energy. This paper introduces a quantitative analysis for Pd radioisotope contained in a spent nuclear fuel by using laser-induced photoreduction and inductively coupled plasma mass spectrometry (ICP-MS). The importance and problems of quantitative analysis for radioisotopes in spent nuclear fuels are described, and the principle, advantages, and future applications of the spectroscopic technique are discussed.
Taguchi, Shigeo; Miyauchi, Hironari*; Horigome, Kazushi; Yamamoto, Masahiko; Kuno, Takehiko
Bunseki Kagaku, 67(11), p.681 - 686, 2018/11
In thermal ionization mass spectrometry, de-gassing is one of the important treatments to release impurities of filaments and to minimize the influence of background. In this work, the effect of the surface change in the tungsten filament induced by the conductively heating treatment on uranium isotopic (U/U) measurement has been investigated. It was found that the conductively heating treatment of the filament has the effect of smoothing the surface of the filament and also has the effect of improving the deposition of the sample on the filament surface. As a result of either these effects, the precision of uranium isotopic (U/U) measurement was improved.
Okubo, Ayako; Shinohara, Nobuo; Magara, Masaaki
Journal of Radioanalytical and Nuclear Chemistry, 314(1), p.231 - 234, 2017/10
Times Cited Count:2 Percentile:19.37(Chemistry, Analytical)The model date of two enriched uranium materials were determined using a new method for nuclear forensics investigation. In this method, the Th/U ratio was calculated without spike addition from measured ratios of Th/Th and U/U, and calculated Th/U ratio in secular equilibrium. The obtained model date for the low-enriched uranium material was agreed with the known production date within uncertainty. For the highly enriched uranium material, slightly younger model date than the known production date was obtained. The U interference on Th counting in thermal ionization mass spectrometry measurement was suspected as a potential cause.
Tanzawa, Sadamitsu; Hiroki, Seiji; Abe, Tetsuya
Shinku, 46(3), p.154 - 157, 2003/03
no abstracts in English
Tanzawa, Sadamitsu; Hiroki, Seiji; Abe, Tetsuya; Futatsuki, Takashi*; Tajima, Yoshinori*
Shinku, 46(1), p.44 - 48, 2003/01
no abstracts in English
Hakoda, Teruyuki; Arai, Hidehiko; Hashimoto, Shoji
Journal of Chemical Engineering of Japan, 34(10), p.1300 - 1308, 2001/10
Times Cited Count:2 Percentile:25.1(Engineering, Chemical)The continuous gas monitoring system using the mass filter (CGM-MS) was developed for the measurement of gaseous substances in air under atmospheric pressure. A capillary tube introduces the gases under atmospheric pressure into a mass filter installed in a vacuum chamber. The CGM-MS detected gaseous substances, such as sulfur dioxide, benzene and chlorobenzene, with detectable sensitivity of 0.7-1 ppmv. The monitoring system was also applied for the analysis of the products formed in electron beam irradiation of trichloroethylene (TCE) and air mixture. Dichloroacetyl chloride, carbonyl chloride (COCl), and chlorine (Cl) were quantitatively analyzed. Trichloroethylene and the products were oxidized and completely converted into carbon dioxide, Cl, and hydrochloric acid at 15 kGy. Carbonyl chloride is dissolved in an alkaline solution to be automatically oxidized into CO and Cl. The combination of the irradiation and the dissolution of the irradiated gas decreased to 7 from 15 kGy for the complete oxidation of TCE and the products.
Kobayashi, Hideo; ; ; ; ; *; *
JNC TN8440 2001-005, 33 Pages, 2001/02
Four mass spectrometers are used for plutonium and uranium isotopic composition analysis in the Plutonium Fuel Center. Analytical errors of the analysis was evaluated based on routine control data obtained with measurement of reference materials. It was confirmed that the errors satisfied the International Target Values for safeguard analysis, and the random error of the analysis was improved by changing conventional method to total evaporation method.
Nakajima, Kunihisa; Arai, Yasuo;
Journal of Nuclear Materials, 247, p.33 - 36, 1997/00
Times Cited Count:12 Percentile:67.87(Materials Science, Multidisciplinary)no abstracts in English
Wada, Yukio; Funasaka, Hideyuki; Myochin, Munetaka; Yamamoto, Kazunori; Harada, Hideo; ;
PNC TN8100 96-005, 16 Pages, 1996/01
no abstracts in English
*; Hiroki, Seiji; Abe, Tetsuya; Murakami, Yoshio
Vacuum, 47(11), p.1313 - 1316, 1996/00
Times Cited Count:2 Percentile:16.34(Materials Science, Multidisciplinary)no abstracts in English
Hiroki, Seiji; Abe, Tetsuya; Murakami, Yoshio
Vacuum, 47(6-8), p.767 - 769, 1996/00
Times Cited Count:7 Percentile:39.5(Materials Science, Multidisciplinary)no abstracts in English
Hiroki, Seiji; *; Abe, Tetsuya; Murakami, Yoshio
Shinku, 38(2), p.74 - 79, 1995/00
no abstracts in English
Hiroki, Seiji; *; *; *; Abe, Tetsuya; Murakami, Yoshio
Vacuum, 46(7), p.681 - 683, 1995/00
Times Cited Count:9 Percentile:47.3(Materials Science, Multidisciplinary)no abstracts in English
Hiroki, Seiji; Abe, Tetsuya; Murakami, Yoshio; *; *
J. Vac. Sci. Technol., A, 12(5), p.2711 - 2715, 1994/09
no abstracts in English
Hiroki, Seiji; Abe, Tetsuya; Murakami, Yoshio
Int. J. Mass Spectrom. Ion Process, 136, p.85 - 89, 1994/00
no abstracts in English
Oba, Hironori; Araki, Masanori; Shibata, Takemasa
Japanese Journal of Applied Physics, 33(5A), p.L693 - L695, 1994/00
Times Cited Count:2 Percentile:17.87(Physics, Applied)no abstracts in English
Nagai, Shiro; Yamagishi, Kojiro*
Genshiryoku Kogyo, 39(10), p.40 - 45, 1993/00
no abstracts in English
Hiroki, Seiji; Abe, Tetsuya; Murakami, Yoshio
Shinku, 36(1), p.1 - 7, 1993/00
no abstracts in English