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Furuta, Takuya
Igaku Butsuri, 41(4), P. 194, 2021/12
Number of medical uses of Particle and Heavy Ion Transport code System (PHITS) has been increased due to the recent high demands of medical use of radiations. The summary of such research works was described in the review article on medical application of Particle and Heavy Ion Transport code System PHITS published in Radiological Physics and Technology in 2021. There was a request from the editorial board of Japan Society of Medical Physics (JSMP) for writing an introductory article of this article in their internal journal. The research works on medical applications described in the review article, useful functions for medical application in PHITS, and newly opened user forum of PHITS have been introduced.
Furuta, Takuya; Sato, Tatsuhiko
Radiological Physics and Technology, 14(3), p.215 - 225, 2021/09
Number of the PHITS users has steadily increased since 2010 from when it is officially counted. Among them, increase of new users in medical physics is outstanding. Many research works in medical physics using PHITS have been published and the applications are widely spread in different fields such as applications to different types of radiotherapy, shielding calculations of medical facilities, application to radiation biology, and research and development of medical tools. In this article, we will introduce useful functions for medical application in PHITS by referring to examples of various medical applications.
Oba, Takashi*; Ishikawa, Tetsuo*; Nagai, Haruyasu; Tokonami, Shinji*; Hasegawa, Arifumi*; Suzuki, Gen*
Scientific Reports (Internet), 10(1), p.3639_1 - 3639_11, 2020/02
Times Cited Count：18 Percentile：84.26(Multidisciplinary Sciences)Internal doses of residents after the Fukushima Daiichi Nuclear Power Station accident have been reconstructed. In total 896 behaviour records in the Fukushima Health Management Survey were analysed to estimate thyroid doses via inhalation, using a spatiotemporal radionuclides concentration database constructed by atmospheric dispersion simulations. After a decontamination factor for sheltering and a modifying factor for the dose coefficient were applied, estimated thyroid doses were close to those estimated on the basis of direct thyroid measurement. The median and 95th percentile of thyroid doses of 1-year-old children ranged from 1.2 to 15 mSv and from 7.5 to 30 mSv, respectively.
Kaneko, Fumitoshi*; Radulescu, A.*; Iwase, Hiroki*; Takata, Shinichi; Nishiura, Masayoshi*; Hou, Z.*
Macromolecular Symposia, 386(1), p.1900008_1 - 1900008_5, 2019/08
Times Cited Count：0 Percentile：0.14(Polymer Science)Fukaya, Yuji; Goto, Minoru; Nishihara, Tetsuo
JAEA-Research 2015-023, 44 Pages, 2016/02
JAEA-Research-2015-023.pdf:2.13MB
A study on innovative High Temperature Gas-cooled Reactor (HTGR) to reduce generation of potential radiotoxicity had been performed. Unlike the Fast Breeder Reactor (FBR) and Accelerated Driven System (ADS), which can confine radioactive nuclides into its fuel cycle as multi-recycling and transmute, in this study we attempt to reduce the generation of the radiotoxicity itself by preventing the generation of Pu and MA, which is generated with the energy generation. In this context, we proposed the innovative HTGR that employs the Highly Enriched Uranium (HEU) fuel by removing 
U : source of the Pu and MA. However, there are the problems of fuel integrity, nuclear proliferation, nuclear self-regulation characteristics, and economy of electricity generation which are caused by employing HEU. For these problems, we investigated and proposed the solutions. Especially for the nuclear self-regulation characteristics, which were improved by adding Er, the optimized nuclear design was quantitatively determined and elucidated by the Bondarenko approach. As a result, it was confirmed that the proposed reactor can solves these problem for employing HEU fuel and the high specification and economy as same as those of standard HTGR fueled uranium.
Yuguchi, Takashi; Sasao, Eiji; Ishibashi, Masayuki; Nishiyama, Tadao*
American Mineralogist, 100(5-6), p.1134 - 1152, 2015/05
Times Cited Count：33 Percentile：73.58(Geochemistry & Geophysics)This paper describes the biotite chloritization process with a focus on mass transfer in the Toki granitic pluton, Central Japan, and also depicts the temporal variations in chemical characteristics of hydrothermal fluid associated with chloritization during the sub-solidus cooling of the pluton. Singular value decomposition (SVD) analysis results in chloritization reaction equations for eight mineral assemblages, leading to the quantitative assessment of mass transfer between the reactant and product minerals, and inflow and outflow of components through the hydrothermal fluid. The matrices for SVD analysis consist of arbitrary combinations of molar volume and closure component in the reactant and product minerals. The eight reactions represent the temporal variations of chemical characteristics of the hydrothermal fluid associated with chloritization: the progress of chloritization results in gradual increase of silicon, potassium and chlorine and gradual decrease of calcium and sodium in the hydrothermal fluid with temperature decrease. The biotite chloritization involves two essential formation processes: Formation Process 1, small volume decrease from biotite to chlorite and large inflow of metallic ions from the hydrothermal fluid, and Formation Process 2, large volume decrease and large outflow of metallic ions into hydrothermal fluid. Chlorite produced during Formation Process 1 dominates over that of Formation Process 2, resulting in the gradual decrease of metallic components in the hydrothermal fluid with chloritization progress. The combination of continuous reactions based on compositional variations in chlorite together with corresponding continuous Al
variations gives an indication of the temporal variations in rates of decreasing and increasing concentration of chemical components in the hydrothermal fluid associated with chloritization.
LiJeong, S.-C.*; Katayama, Ichiro*; Kawakami, Hirokane*; Watanabe, Yutaka*; Ishiyama, Hironobu*; Miyatake, Hiroari*; Sataka, Masao; Okayasu, Satoru; Sugai, Hiroyuki; Ichikawa, Shinichi; et al.
Nuclear Instruments and Methods in Physics Research B, 230(1-4), p.596 - 600, 2005/04
Times Cited Count：6 Percentile：45.52(Instruments & Instrumentation)no abstracts in English
Advanced Radiation Technology Center
JAERI-Review 2004-025, 374 Pages, 2004/11
JAERI-Review-2004-025-p0001-p0116.pdf:20.67MBJAERI-Review-2004-025-p0117-p0247.pdf:21.34MBJAERI-Review-2004-025-p0248-p0374.pdf:23.39MB
This annual report describes research and development activities which have been performed with the JAERI TIARA (Takasaki Ion Accelerators for Advanced Radiation Application) facilities from April 1, 2003 to March 31, 2004. Summary reports of 115 papers and brief descriptions on the status of TIARA in the period are contained. A list of publications, the type of research collaborations and organization of TIARA are also given as appendices.
Advanced Radiation Technology Center
JAERI-Review 2003-033, 390 Pages, 2003/11
JAERI-Review-2003-033-p0001-p0187.pdf:18.1MBJAERI-Review-2003-033-p0188-p0390.pdf:15.87MB
This annual report describes research and development activities which have been performed with the JAERI TIARA (Takasaki Ion Accelerators for Advanced Radiation Application) facilities from April 1, 2002 to March 31, 2003. Summary reports of 113 papers and brief descriptions on the status of TIARA in the period are contained. A list of publications, the type of research collaborations and organization of TIARA are also given as appendices.
Jeong, S.-C.*; Katayama, Ichiro*; Kawakami, Hirokane*; Ishiyama, Hironobu*; Miyatake, Hiroari*; Sataka, Masao; Iwase, Akihiro*; Okayasu, Satoru; Sugai, Hiroyuki; Ichikawa, Shinichi; et al.
Japanese Journal of Applied Physics, Part 1, 42(7A), p.4576 - 4583, 2003/07
Times Cited Count：14 Percentile：50.33(Physics, Applied)no abstracts in English
Advanced Radiation Technology Center
JAERI-Review 2002-035, 361 Pages, 2002/11
JAERI-Review-2002-035-p0001-p0112.pdf:14.61MBJAERI-Review-2002-035-p0113-p0236.pdf:19.49MBJAERI-Review-2002-035-p0237-p0361.pdf:12.43MB
This annual report describes research and developement activities which have been performed with the JAERI TIARA (Takasaki Ion Accelerators for Advanced Radiation Application) Facilities from April 1, 2001 to March 31, 2002. Summary reports of 109 papers and brief descriptions on the status of TIARA in the period are contained. A list of publications, the type of research collaborations and organization of TIARA are also given as appendices.
Advanced Radiation Technology Center
JAERI-Review 2001-039, 328 Pages, 2001/11
JAERI-Review-2001-039.pdf:41.69MB
no abstracts in English
Agematsu, Takashi; Kamiya, Tomihiro; Kaneko, Hirohisa; Mizuhashi, Kiyoshi; Saito, Yuichi; Chiba, Atsuya; Fukuda, Mitsuhiro; Arakawa, Kazuo
Proceedings of 13th Symposium on Accelerator Science and Technology, p.467 - 469, 2001/10
A new project aiming a breakthrough in biotechnology and materials science has been proposed at TIARA (Takasaki Ion Accelerators for Advanced Radiation Application) facilities of JAERI. We have started designing a K900 superconducting AVF cyclotron (K900 SCC). The beam transport line for JAERI K900 SCC has been designed preliminary for heavy ion beams with an energy of more than a hundred MeV/n. An achromatic beam transport system has been designed for high transmission efficiency of ion beams and good adjustability of magnet parameters using the computer code “TRANSPORT".
Fukuda, Mitsuhiro; Arakawa, Kazuo; Yokota, Wataru; Okumura, Susumu; Agematsu, Takashi; Kamiya, Tomihiro; Mizuhashi, Kiyoshi; Nara, Takayuki; Saito, Yuichi; Ishii, Yasuyuki; et al.
AIP Conference Proceedings 600, p.189 - 191, 2001/00
A new project aiming for a breakthrough in biotechnology and materials science has been proposed at TIARA(Takasaki Ion Accelerators for Advanced Radiation Application) facilities of JAERI. Heavy ion beams with an energy of more than a hundred MeV/n will contribute to remarkable progress in breeding of plants and development of new materials. We have started designing a new superconducting AVF cyclotron with a bending limit of 900 and a focusing limit of 300. The cyclotron magnet is being designed to cope with acceleration of both the heavy ions and 300 MeV protons.
Advanced Radiation Technology Center
JAERI-Review 2000-024, 326 Pages, 2000/10
JAERI-Review-2000-024.pdf:33.65MB
no abstracts in English
Advanced Radiation Technology Center
JAERI-Review 99-025, p.298 - 0, 1999/10
JAERI-Review-99-025.pdf:23.84MB
no abstracts in English
Goto, Masahiro*; Ichinose, Yuji; Kawanishi, Shunichi; Fukumura, H.*
Japanese Journal of Applied Physics, Part 2, 38(1A-B), p.L87 - L88, 1999/01
Times Cited Count：8 Percentile：39.79(Physics, Applied)no abstracts in English
*; *; *; Seguchi, Tadao; Tabata, Yoneho*
Radiation Physics and Chemistry, 55(4), p.399 - 408, 1999/00
Times Cited Count：15 Percentile：72.22(Chemistry, Physical)no abstracts in English
JAERI-Review 98-016, 288 Pages, 1998/10
JAERI-Review-98-016.pdf:17.33MB
no abstracts in English
Chishiro, Etsuji*; Takado, H.*; Touchi, Y.*; Kusano, Joichi; Mizumoto, Motoharu
Proceedings of 23rd Linear Accelerator Meeting in Japan, p.243 - 245, 1998/00
no abstracts in English
