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Ozu, Akira; Okamoto, Ryuta*; Kawakita, Hiroshi*
Kurin Tekunoroji, 16(3), p.56 - 61, 2006/03
In recent years, particle counting devices capable of monitoring particles suspended in air on real-time basis are of considerable practical concern in the fields of semiconductor and large display panel industries. A remote particle counter, which had been developed for monitoring aerosols released in air from nuclear facilities, has been applied to a measurement system for clean rooms used in the fields. It can visualize the particles in narrow space at a distance of 6m and derive the number and size distribution of particles with diameter of above 0.5 microns. By improving the laser energy, sensitivity of the image intensifier camera, and magnification of the zoom lens used in the system, it is possible to detect the particles with diameters of below 0.5 microns. The method and the current performance of the measurement system are described.
Ozu, Akira
Genshiryoku eye, 51(11), p.68 - 71, 2005/11
In order to develop technologies for predicting and monitoring the atmospheric dispersion of aerosols containing radionuclides, a feasibility study on the real-time measurement of the aerosol being released into atmosphere from nuclear facilities has been conducted by using a laser radar technique. We have developed a remote particle counter capable of monitoring aerosol suspended in a distance space. The particle counter can measure the number and size of the aerosol on real-time basis. The performance of the counter was examined compared with that of conventional particle counters. It was found that aerosols with diameter of 
0.5 microns could be detected at a distance of 5 m. The technique is also applicable and useful for the aerosol monitoring in the other field such as semiconductor industries.
Iguchi, Kazunari
Nihon Shashin Gakkai-Shi, 68(1), p.56 - 59, 2005/02
In order to detect undeclared activities of nuclear facilities, Japan Atomic Energy Research Institute (JAERI) has developed analytical methods for safeguards environmental samples. As for particle analysis of safeguards environmental sample analysis which can determine isotope ratios of nuclear materials for individual particles, secondary ion mass spectrometry (SIMS) is known as a powerful method. However, it is difficult to analyze particles having diameter below 1 
m due to its detection limit. To overcome the problem, JAERI is developing an analytical method using fission track (FT) technique. The outline of the method is described in this report.
Lee, C. G.; Iguchi, Kazunari; Inagawa, Jun; Suzuki, Daisuke; Esaka, Fumitaka; Magara, Masaaki; Sakurai, Satoshi; Watanabe, Kazuo; Usuda, Shigekazu
Dai-26-Kai Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Nenji Taikai Rombunshu, p.171 - 178, 2005/00
Particle analysis by FT-TIMS method is effective for safeguards environmental samples because the isotope ratios of sub-micrometer particles can be determined. The FT-TIMS method developed by the authors, in which the particles are confined in the detector, has merits such as high detection efficiency and the possibility as a screening method for uranium particles according to their enrichment by controlling the etching time. However, it was found that a part of uranium particles contained in a detector may dissolve during the etching process of the detector. In order to overcome the problem, we are developing a novel sample preparing method in which the FT detector and the particle layer are separated. In the conventional FT sample of separated type, the detection process of particles of interest is time-consuming and complicated due to the discrepancy in position between tracks and particles. In contrast, the discrepancy was solved by fixing a part of a detector and a particle layer in our method, which improved the detection efficiency of particles containing fissile materials.
Esaka, Fumitaka; Watanabe, Kazuo; Fukuyama, Hiroyasu; Onodera, Takashi; Esaka, Konomi; Inagawa, Jun; Iguchi, Kazunari; Suzuki, Daisuke; Lee, C. G.; Magara, Masaaki; et al.
Dai-25-Kai Kaku Busshitsu Kanri Gakkai Nihon Shibu Nenji Taikai Rombunshu, p.128 - 135, 2004/00
Japan Atomic Energy Research Institute (JAERI) was qualified as a member of the IAEA network analytical laboratories (NWALs) for particle and bulk analyses of safeguards environmental samples in January 2003. The particle analysis gives more detailed information on nuclear facility operation than the bulk analysis because the isotope ratios of nuclear materials in the samples collected inside nuclear facilities (swipe samples) can be determined for individual particles. We applied, as a method for uranium isotope ratio measurement, secondary ion mass spectrometry (SIMS) to particle analysis. Prior to the SIMS analysis, the particles in a swipe sample are recovered onto a carrier by impaction. The carriers with the recovered particles are then screened by total reflection X-ray fluorescence spectrometry. We integrated these techniques into a standard procedure, which is applied to domestic and IAEA swipe samples routinely.
Amano, Hikaru; Onuma, Yoshikazu*
Journal of Radioanalytical and Nuclear Chemistry, 255(1), p.217 - 222, 2003/01
Times Cited Count：8 Percentile：49.75(Chemistry, Analytical)no abstracts in English
Yanase, Nobuyuki; Isobe, Hiroshi*; Sato, Tsutomu*; Sanada, Yukihisa*; Matsunaga, Takeshi; Amano, Hikaru
Journal of Radioanalytical and Nuclear Chemistry, 252(2), p.233 - 239, 2002/05
Times Cited Count：6 Percentile：39.3(Chemistry, Analytical)no abstracts in English
Usuda, Shigekazu; Watanabe, Kazuo; Sakurai, Satoshi; Magara, Masaaki; Hanzawa, Yukiko; Esaka, Fumitaka; Miyamoto, Yutaka; Yasuda, Kenichiro; Saito, Yoko; Gunji, Katsubumi*; et al.
KEK Proceedings 2001-14, p.88 - 92, 2001/06
no abstracts in English
Adachi, Takeo; Usuda, Shigekazu; Watanabe, Kazuo; Sakurai, Satoshi; Magara, Masaaki; Hanzawa, Yukiko; Esaka, Fumitaka; Yasuda, Kenichiro; Saito, Yoko; Takahashi, Masato; et al.
IAEA-SM-367/10/02 (CD-ROM), 8 Pages, 2001/00
no abstracts in English
Amano, Hikaru; Ueno, Takashi; Arkhipov, N.*; Paskevich, S.*; Onuma, Yoshikazu*
Proceedings of 10th International Congress of the International Radiation Protection Association (IRPA-10) (CD-ROM), 6 Pages, 2000/00
no abstracts in English
Yanase, Nobuyuki; Matsunaga, Takeshi; Amano, Hikaru; Isobe, Hiroshi; Sato, Tsutomu
Proc. of 7th Int. Conf. on Radioactive Waste Management and Environmental Remediation (ICEM'99)(CD-ROM), 6 Pages, 1999/00
no abstracts in English
Hanzawa, Yukiko; Magara, Masaaki; Esaka, Fumitaka; Watanabe, Kazuo; Usuda, Shigekazu; Miyamoto, Yutaka; Gunji, Katsubumi; Yasuda, Kenichiro; Nishimura, Hideo; Adachi, Takeo
Proceedings of OECD/NEA Workshop on Evaluation of Speciation Technology, p.167 - 172, 1999/00
no abstracts in English
Hanzawa, Yukiko; Magara, Masaaki; Esaka, Fumitaka; Watanabe, Kazuo; Usuda, Shigekazu; Gunji, Katsubumi; Yasuda, Kenichiro; Takahashi, Tsukasa; Nishimura, Hideo; Adachi, Takeo; et al.
Proceedings of the Institute of Nuclear Materials Management 40th Annual Meeting (CD-ROM), 7 Pages, 1999/00
no abstracts in English
; Onodera, Junichi; *; Nagaoka, Toshi; *
Genshiryoku Kogyo, 42(10), p.11 - 17, 1996/00
no abstracts in English
Watanabe, Miki*; Amano, Hikaru; Onuma, Yoshikazu*; Ueno, Takashi; Matsunaga, Takeshi; Yanase, Nobuyuki
Proc. of 4th Int. Conf. on Nucl. and Radiochemistry, 2, 4 Pages, 1996/00
no abstracts in English
Tomita, Ryohei; Tomita, Jumpei; Suzuki, Daisuke; Yasuda, Kenichiro; Esaka, Fumitaka; Miyamoto, Yutaka
no journal, ,
It is necessary to correctly calibrate the mass bias effect of uranium isotopes using uranium standard particles in the secondary ion mass spectrometry (SIMS) analysis. The preparation of uranium standard particles is mainly carried out by drying aerosols generated from uranium standard solutions in unique equipment and facility. This is the reason why only few types of commercial uranium standard particles are available. In this study, our purpose is to propose easier way to prepare uranium standard particle by immersing porous silicon particle in the uranium standard solution. Quality of this handmade uranium standard particles were evaluated by analyzing isotopic ratios using SIMS. The uranium isotopic standard solution (
U/
U=0.694, 
U/U=0.922) of 2.21 ppm was concentrated to 4.48
10
ppm, and mixed with porous silicon particle. Uranium isotopic ratios of handmade particles collected on a glassy carbon planchet were analyzed using LG-SIMS (IMS-1300HR
, CAMECA). Analytical results of U/U and U/U agreed with the certified value of standard solution within the standard deviation (1
). This new particle preparation is effective to create standard particles without uranium aerosol, and the particles made by this method showed same isotopic ratios as standard solution in which porous silicon particles was immerged.
