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Kokubun, Yuji; Nakada, Akira; Seya, Natsumi; Koike, Yuko; Nemoto, Masashi; Tobita, Keiji; Yamada, Ryohei*; Uchiyama, Rei; Yamashita, Daichi; Nagai, Shinji; et al.
JAEA-Review 2023-046, 164 Pages, 2024/03
JAEA-Review-2023-046.pdf:4.2MB
The Nuclear Fuel Cycle Engineering Laboratories conducts environmental radiation monitoring around the reprocessing plant in accordance with the "Safety Regulations for Reprocessing Plant of JAEA, Part IV: Environmental Monitoring". This report summarizes the results of environmental radiation monitoring conducted during the period from April 2022 to March 2023 and the results of dose calculations for the surrounding public due to the release of radioactive materials into the atmosphere and ocean. In the results of the above environmental radiation monitoring, many items were affected by radioactive materials emitted from the accident at the Fukushima Daiichi Nuclear Power Plant of Tokyo Electric Power Company, Incorporated (changed to Tokyo Electric Power Company Holdings, Inc. on April 1, 2016), which occurred in March 2011. Also included as appendices are an overview of the environmental monitoring plan, an overview of measurement methods, measurement results and their changes over time, meteorological statistics results, radioactive waste release status, and an evaluation of the data which deviated of the normal range.
Yamamoto, Kazami; Kinsho, Michikazu; Hayashi, Naoki; Saha, P. K.; Tamura, Fumihiko; Yamamoto, Masanobu; Tani, Norio; Takayanagi, Tomohiro; Kamiya, Junichiro; Shobuda, Yoshihiro; et al.
Journal of Nuclear Science and Technology, 59(9), p.1174 - 1205, 2022/09
Times Cited Count：7 Percentile：80.72(Nuclear Science & Technology)In the Japan Proton Accelerator Research Complex, the purpose of the 3 GeV rapid cycling synchrotron (RCS) is to accelerate a 1 MW, high-intensity proton beam. To achieve beam operation at a repetition rate of 25 Hz at high intensities, the RCS was elaborately designed. After starting the RCS operation, we carefully verified the validity of its design and made certain improvements to establish a reliable operation at higher power as possible. Consequently, we demonstrated beam operation at a high power, namely, 1 MW. We then summarized the design, actual performance, and improvements of the RCS to achieve a 1 MW beam.
Kondo, Yasuhiro; Hirano, Koichiro; Ito, Takashi; Kikuzawa, Nobuhiro; Kitamura, Ryo; Morishita, Takatoshi; Oguri, Hidetomo; Okoshi, Kiyonori; Shinozaki, Shinichi; Shinto, Katsuhiro; et al.
Journal of Physics; Conference Series, 1350, p.012077_1 - 012077_7, 2019/12
Times Cited Count：1 Percentile：48.14(Physics, Particles & Fields)We have upgraded a 3-MeV linac at J-PARC. The ion source is same as the J-PARC linac's, and the old 30-mA RFQ is replaced by a spare 50-mA RFQ, therefore, the beam energy is 3 MeV and the nominal beam current is 50 mA. The main purpose of this system is to test the spare RFQ, but also used for testing of various components required in order to keep the stable operation of the J-PARC accelerator. The accelerator has been already commissioned, and measurement programs have been started. In this paper, present status of this 3-MeV linac is presented.
Sawabe, Yuki*; Ishiyama, Tatsuya; Takahashi, Daisuke; Kato, Yuko; Suzuki, Takahiro*; Hirano, Koichiro; Takei, Hayanori; Meigo, Shinichiro; Kikuzawa, Nobuhiro; Hayashi, Naoki
Proceedings of 13th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.647 - 651, 2016/11
In the J-PARC, a 3 MeV linac has been developed for the tests of beam scraper irradiation and charge exchange by high-power laser. To accomplish tests efficiently and safely, the control system for 3 MeV was designed and developed, and this system consists of four subsystems, personal protection system, machine protection system, timing system, and remote control system using the EPICS. In this paper, the details of control system for a 3 MeV linac are presented.
Kawase, Masato*; Takahashi, Hiroki; Kato, Yuko; Kikuzawa, Nobuhiro; Ouchi, Nobuo
Proceedings of 10th Annual Meeting of Particle Accelerator Society of Japan (Internet), p.731 - 734, 2014/06
The data acquisition in J-PARC LINAC/RCS are two methods of data archiving of polling data via EPICS Channel Access and synchronized waveform data. The synchronized waveform data are collected by several Wave Endless Recorders (WER). The WER counts the trigger number and holds waveform data in a ring buffer memory. We developed a Trigger Counter in order to manage the trigger number of each WER and synchronize the trigger number of each WER via LAN. At present, in order to install the waveform data synchronization system, we carried out verification using the timing test bench. This report presents about the waveform data synchronization system and future plan of the data acquisition system.
spp. under the ISS environmental conditions for performing exposure experiments of microbes in the Tanpopo missionKawaguchi, Yuko*; Yang, Y.*; Kawashiri, Narutoshi*; Shiraishi, Keisuke*; Takasu, Masako*; Narumi, Issey*; Sato, Katsuya; Hashimoto, Hirofumi*; Nakagawa, Kazumichi*; Tanigawa, Yoshiaki*; et al.
Origins of Life and Evolution of Biospheres, 43(4-5), p.411 - 428, 2013/10
Times Cited Count：42 Percentile：80.22(Biology)Takano, Nao*; Takahashi, Yuko*; Yamamoto, Mitsuru*; Teranishi, Mika*; Yamaguchi, Hiroko*; Sakamoto, Ayako; Hase, Yoshihiro; Fujisawa, Hiroko*; Wu, J.*; Matsumoto, Takashi*; et al.
Journal of Radiation Research, 54(4), p.637 - 648, 2013/07
Times Cited Count：14 Percentile：51.10(Biology)Takano, Nao*; Takahashi, Yuko*; Yamamoto, Mitsuru*; Teranishi, Mika*; Hase, Yoshihiro; Sakamoto, Ayako; Tanaka, Atsushi; Hidema, Jun*
JAEA-Review 2011-043, JAEA Takasaki Annual Report 2010, P. 104, 2012/01
Yoshikawa, Hiroshi; Suzuki, Takahiro; Sakaki, Hironao; Ito, Yuichi; Kato, Yuko; Kawase, Masato; Sako, Hiroyuki; Shen, G.; Takahashi, Hiroki; Fukuta, Shimpei; et al.
Proceedings of 24th International Linear Accelerator Conference (LINAC 2008) (CD-ROM), p.52 - 54, 2009/00
LINAC of J-PARC began to operate in November, 2006, and a achieved an initial performance in January, 2007. Afterwards, the beam supply to RCS begins, and it is operating extremely with stability up to now. Here, the evaluation for comparison of the design and realities of architecture and performance of the LINAC control system are shown. Especially, the conceptual idea of function arrangement in the hierarchy of the control system architecture is shown. Now, the LINAC control system is in the second phase for the high power beam and reducing the beam loss, and the analysis of the system response identification for the high precision beam control is started.
Suzuki, Takahiro; Yoshikawa, Hiroshi; Sakaki, Hironao; Takahashi, Hiroki; Ito, Yuichi; Kato, Yuko; Kawase, Masato; Ishiyama, Tatsuya; Fukuta, Shimpei*; Watanabe, Kazuhiko*
Proceedings of 5th Annual Meeting of Particle Accelerator Society of Japan and 33rd Linear Accelerator Meeting in Japan (CD-ROM), p.84 - 86, 2008/00
no abstracts in English
Yoshikawa, Hiroshi; Sakaki, Hironao; Sako, Hiroyuki; Takahashi, Hiroki; Shen, G.; Kato, Yuko; Ito, Yuichi; Ikeda, Hiroshi*; Ishiyama, Tatsuya*; Tsuchiya, Hitoshi*; et al.
Proceedings of International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS '07) (CD-ROM), p.62 - 64, 2007/10
J-PARC is a large scale facility of the proton accelerators for the multi-purpose of scientific researches in Japan. This facility consists of three accelerators and three experimental stations. Now, J-PARC is under construction, and LINAC is operated for one year, 3GeV synchrotron has just started the commissioning in this October the 1st. The completion of this facility will be next summer. The control system of accelerators established fundamental performance for the initial commissioning. The most important requirement to the control system of this facility is to minimize the activation of accelerator devices. In this paper, we show that the performances of each layer of this control system have been achieved in the initial stage.
Takahashi, Hiroki; Kawase, Masato; Sakaki, Hironao; Yoshikawa, Hiroshi; Ishiyama, Tatsuya*; Ito, Yuichi; Kato, Yuko; Sugimoto, Makoto*; Suzuki, Takahiro*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.442 - 444, 2006/08
no abstracts in English
Sako, Hiroyuki; Sakaki, Hironao; Takahashi, Hiroki; Yoshikawa, Hiroshi; Ito, Yuichi; Kato, Yuko; Kawase, Masato; Shen, G.; Kiyomichi, Akio; Kamikubota, Norihiko*; et al.
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.373 - 375, 2006/00
A Relational database (RDB) system, which is the core of the J-PARC Linac control system, has been developed. The beam commissioning of Linac is planned to start in December 2006. The RDB sytem consists of the following databases; "DB1", which records basic device parameters, "DB2", which acquires online EPICS data, "Operation Log DB", which records a history of operating parameters, and "Commissioning DB", which holds information on geometry of devices and commissioning. We report on the development status of each DB as well as status of the unified commissioning environment software which utilizes these databases.
Ishiyama, Tatsuya*; Yoshikawa, Hiroshi; Sakaki, Hironao; Sako, Hiroyuki; Takahashi, Hiroki; Ito, Yuichi; Kato, Yuko; Kawase, Masato; Ueda, Shinji*; Sugimoto, Makoto*; et al.
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.370 - 372, 2006/00
no abstracts in English
Sakaki, Hironao; Takahashi, Hiroki; Ishiyama, Tatsuya*; Kawase, Masato; Sako, Hiroyuki; Kato, Yuko; Ito, Yuichi; Yoshikawa, Hiroshi; Ueda, Shinji*; Suzuki, Takahiro*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM), p.367 - 369, 2006/00
This paper reports Personnel Interlock System, Machine Protection System, and other Interlock System in J-PARC LINAC. The noise measures is important in MPS, we describe the noise decreasing method. The number of accelerating particles in J-PARC LINAC that can be accelerated has been deciding by ministry's guideline. Therefore, it is necessary to do severe surveillance. Here we also explain this particle monitoring instrument.
Takahashi, Hiroki; Sakaki, Hironao; Sako, Hiroyuki; Yoshikawa, Hiroshi; Ito, Yuichi*; Kato, Yuko*; Kawase, Masato*; Sugimoto, Makoto*; Watanabe, Kazuhiko*
Proceedings of 2nd Annual Meeting of Particle Accelerator Society of Japan and 30th Linear Accelerator Meeting in Japan, p.531 - 533, 2005/07
J-PARC 3GeV RCS send the beam of a different parameter to both the institutions of MLF and MR. Therefore, 3GeV RCS Control System is required unprecedented capability to supervise correctly by distinguishing the beam for MLF and MR. Following the status report last year, this report shows the status of 3GeV RCS Control System focusing on Data Acquisition system which is able to collect the synchronized data and Based Data Management system which become the basis for 3GeV RCS Control System.
Sako, Hiroyuki; Sakaki, Hironao; Takahashi, Hiroki; Yoshikawa, Hiroshi; Ito, Yuichi*; Kato, Yuko*; Kamikubota, Norihiko*; Sugimoto, Makoto*; Watanabe, Kazuhiko*; Ikeda, Hiroshi*; et al.
Proceedings of 2nd Annual Meeting of Particle Accelerator Society of Japan and 30th Linear Accelerator Meeting in Japan, p.462 - 464, 2005/07
Current status of the RDB system in J-PARC LINAC is presented. The machine database records static data of devices and the control system, whereas the operation log database records a history of operation parameters. The overall design of control flow among high-level applications, simulators, and database is described. Then results of a control test of the power supply for DTQ, and a prototype test of the operation log database in MEBT1 test bench at KEK are reported. In the end, a scheme to generate simulation configuration files from RDB is shown.
Takahashi, Hiroki; Sakaki, Hironao; Sako, Hiroyuki; Yoshikawa, Hiroshi; Kato, Yuko*; Sugimoto, Makoto*; Kawase, Masato*
Proceedings of 1st Annual Meeting of Particle Accelerator Society of Japan and 29th Linear Accelerator Meeting in Japan, p.233 - 235, 2004/08
3GeVRCS send the beam of a different parameter to both the institutions of MLF and 50GeVMR. Therefore, 3GeVRCS Control System is required to supervise by distinguishing the beam for every institution correctly. Moreover, since a parameter change is made during continuation operation, without suspending an accelerator, it is required that the beam loss by operation should be reduced as much as possible. This report shows the examination and design situation of 3GeVRCS control system that aim at these realizations.
Haga, Yuko*; Neriishi, Keiko*; Takahashi, K.*; Niimura, Nobuo
Nuclear Instruments and Methods in Physics Research A, 487(3), p.504 - 510, 2002/07
Times Cited Count：9 Percentile：50.78(Instruments & Instrumentation)no abstracts in English
Yokobori, Shinichi*; Yang, Y.*; Sugino, Tomohiro*; Kawaguchi, Yuko*; Itahashi, Shiho*; Fujisaki, Kenta*; Fushimi, Hidehiko*; Hasegawa, Sunao*; Hashimoto, Hirofumi*; Hayashi, Nobuhiro*; et al.
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