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Sabri, A. H. A.*; Tajudin, S. M.*; Aziz, M. Z. A.*; Furuta, Takuya
Radiological Physics and Technology, 16(1), p.109 - 117, 2023/03
The spatial distributions of photon dose rates in a brachytherapy room with an Iridium-192 were simulated by using the particle and heavy ion transport code system (PHITS). A geometry of the brachytherapy room with concrete walls and a sliding lead door was reproduced by tracing the existing room in Advanced Medical and Dental Institute at the Universiti Sains Malaysia in Penang. The simulation results were confirmed by comparing to the measured results using a thermoluminescent dosimeter. The simulation study suggested that an additional layer of 3-mm thick lead at the side wall of the entrance will efficiently reduce the dose outside the entrance due to the photons leaked from the edge of the entrance. Simulation with replacing the source with Cobalt-60 was also conducted and revealed the dose level outside the room was too high compared to regulatory value in the current room configuration.
Saito, Kimiaki
Annals of the ICRP, 49(2), p.7 - 9, 2020/10
no abstracts in English
Okubo, Nariaki; Okuno, Yasuki; Kitamura, Akane; Taguchi, Tomitsugu*
Nuclear Instruments and Methods in Physics Research B, 435, p.198 - 202, 2018/11
Times Cited Count：2 Percentile：20.74(Instruments & Instrumentation)Accelerator driven system (ADS) adopts the lead-bismuth eutectic (LBE) as both coolant and spallation target. The oxygen concentration control is one of the most important technical developments. Estimation of durability under gamma-ray irradiation for the oxygen sensor is necessary for the integrity evaluation of ADS components. The Zirconia added by Yttria (YSZ) is the main element in oxygen sensor. Effect of gamma-ray irradiation on the mechanical property and structural change for three types of YSZ with 3, 6, 8 mol% Yttria was evaluated by using 4 points bend test, XRD, SEM and Raman spectroscope. The gamma-ray irradiations were conducted at 1 and 2 kGy/h, which corresponded to the LBE activity after 1 year ADS operation. In the cases of 8Y and 6Y, degradation of strength was not measured and the fracture surface did not change the morphology. In the case of 3Y, however, the strength did not change but phase transformation from tetragonal to monoclinic crystal structure was observed in XRD results, depending on the irradiation dose. This implies that the gamma-ray irradiation causes the phase transformation in 3Y-YSZ.
Seya, Michio; Naoi, Yosuke; Kobayashi, Naoki; Nakamura, Takahisa; Hajima, Ryoichi; Soyama, Kazuhiko; Kureta, Masatoshi; Nakamura, Hironobu; Harada, Hideo
Kaku Busshitsu Kanri Gakkai (INMM) Nihon Shibu Dai-35-Kai Nenji Taikai Rombunshu (Internet), 9 Pages, 2015/01
The Integrated Support Center for Nuclear Non-proliferation and Nuclear Security (ISCN) of Japan Atomic Energy Agency (JAEA) has been conducting (based on collaborations with JAEA other centers) the following basic technology development programs of advanced non-destructive detection/measurement of nuclear material for nuclear security and nuclear non-proliferation. (1) The demonstration test of the Pu-NDA system for spent fuel assembly using PNAR and SINRD (JAEA/USDOE(LANL) collaboration, completed in JFY2013), (2) Basic development of NDA technologies using laser Compton scattered 
-rays (Demonstration of an intense mono-energetic -ray source), (3) Development of alternative to He-3 neutron detection technology, (4) Development of neutron resonance densitometry (JAEA/JRC collaboration)This paper introduces above programs.
Moribayashi, Kengo; Lee, K.*; Kagawa, Takashi*; Kim, D. E.*
Laser Physics, 16(2), p.322 - 324, 2006/02
Times Cited Count：1 Percentile：7.24(Optics)no abstracts in English
Moribayashi, Kengo; Kagawa, Takashi*; Kim, D. E.*
Journal of Plasma and Fusion Research SERIES, Vol.7, p.233 - 236, 2006/00
no abstracts in English
Moribayashi, Kengo; Kagawa, Takashi*; Kim, D. E.*
Journal of Physics B; Atomic, Molecular and Optical Physics, 38(13), p.2187 - 2194, 2005/07
Times Cited Count：6 Percentile：31.16(Optics)no abstracts in English
Sato, Satoshi; Nakao, Makoto*; Verzilov, Y. M.; Ochiai, Kentaro; Wada, Masayuki*; Kubota, Naoyoshi; Kondo, Keitaro; Yamauchi, Michinori*; Nishitani, Takeo
Nuclear Fusion, 45(7), p.656 - 662, 2005/07
Times Cited Count：8 Percentile：28.04(Physics, Fluids & Plasmas)no abstracts in English
Murakami, Hiroyuki; Minami, Kentaro*
Radioisotopes, 53(3), p.197 - 205, 2004/03
no abstracts in English
Daido, Hiroyuki
Reza Kenkyu, 31(11), p.696 - 697, 2003/11
no abstracts in English
Daido, Hiroyuki
Reza Kenkyu, 31(11), p.698 - 706, 2003/11
no abstracts in English
Ir radiation sources for intravascular irradiationKogure, Hiroto; Sorita, Takami; Iwamoto, Seikichi; Nagata, Yasushi*; Hiraoka, Masahiro*; Iwata, Kazuro*; Kawauchi, Yukimasa*; Suzuki, Kazutoshi*
JAERI-Tech 2003-003, 26 Pages, 2003/03
JAERI-Tech-2003-003.pdf:4.83MB
Intravascular brachytherapy is a novel therapy for preventing the restenosis of coronary artery by use of low-dose irradiation. JAERI and Kyoto University have been developing Ir radiation sources by the cooperative research project entitled as "The research on safety and effectiveness of the intravascular brachytherapy for preventing restenosis of the coronary artery disease" since 1998. The radiation source was introduced into the stenosis through a catheter (a guide-tube to insert directly into vascular) to irradiate the diseased part. Ten Ir seed sources (
0.4 mm 
2.5 mm) were positioned between nylon spacers (0.3 mm 1.0 mm) in a flexible covering tube and the tube was plugged with a core-wire; the tube was shrunk to fix the inside materials and the size is 0.46 mm in diameter and 3 m in length. The physically optimal design was determined to insert the radiation source easily into vascular and to get the dose uniformity in the diseased part. The production method of the radiation source, which is practical to use in the clinics was also established.
Yamauchi, Michinori*; Nishitani, Takeo; Ochiai, Kentaro; Morimoto, Yuichi*; Hori, Junichi; Ebisawa, Katsuyuki*; Kasai, Satoshi; Walker, C.*
Review of Scientific Instruments, 74(3), p.1730 - 1734, 2003/03
Times Cited Count：22 Percentile：70.86(Instruments & Instrumentation)no abstracts in English
Motoki, Ryozo; Nemoto, Masahiro*
JAERI-Tech 2002-030, 46 Pages, 2002/03
JAERI-Tech-2002-030.pdf:3.17MB
no abstracts in English
Saegusa, Jun
Hokeikyo Nyusu, (28), p.2 - 5, 2001/10
no abstracts in English
Moribayashi, Kengo; Sudo, Keiko*; Zhidkov, A. G.; Sasaki, Akira; Kagawa, Takashi*
Laser and Particle Beams, 19(4), p.643 - 646, 2001/10
Times Cited Count：6 Percentile：30.49(Physics, Applied)no abstracts in English
Oishi, Tetsuya
Hoken Butsuri, 36(1), p.93 - 94, 2001/03
no abstracts in English
Imamura, Toshiyuki; Muramatsu, Kazuhiro; Kitabata, Hideyuki*; Kaneko, Isamu*; Yamagishi, Nobuhiro*; Hasegawa, Yukihiro*; Takemiya, Hiroshi*; Hirayama, Toshio
Joho Shori Gakkai Kenkyu Hokoku 2001-ARC-142, p.49 - 54, 2001/03
no abstracts in English
Sakamoto, Yukio; Endo, Akira; Tsuda, Shuichi; Takahashi, Fumiaki; Yamaguchi, Yasuhiro
JAERI-Data/Code 2000-044, 191 Pages, 2001/01
JAERI-Data-Code-2000-044.pdf:7.19MB
no abstracts in English
Suzuki, Masayuki; Yamagami, Susumu; Nagai, Keiji*; Norimatsu, Takayoshi*; Mima, Kunioki*; Murakami, Yoichi*; Nakayama, Takeyoshi*; Yu, W.*; Fiedorowicz, H.*; Choi, I. W.*; et al.
Proceedings of 2nd International Conference on Inertial Fusion Sciences and Applications (IFSA 2001), p.1252 - 1255, 2001/00
no abstracts in English
